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Finding the right window air conditioner for upstairs spaces involves balancing cooling power, noise levels, energy efficiency, and ease of installation. The best overall pick, the LG 24,500 BTU Unit, offers powerful cooling for large upstairs areas but comes with higher energy use and installation complexity. Compact models like the LG 5,000 BTU are better suited for smaller bedrooms but may struggle with larger rooms. Tradeoffs often include noise versus power, energy savings versus initial cost, and installation difficulty versus cooling capacity. Continue reading for a detailed breakdown of these top options and what makes each stand out for your upstairs needs.

14
compared
9
brands
Which window air conditioner for upstair should you buy?
★ Top Pick
LG 24,500 BTU Window Air Condi
Best Overall for Large Upstairs Spaces
Exceptional cooling capacity suitable for large spaces
See on Amazon →
Owners of medium-sized upstairs rooms who want quiet operation and smart features
Midea 12,000 BTU U-Shaped Wind
Ultra-quiet operation at only 32 dBA
View on Amazon →
Small upstairs bedrooms or offices requiring efficient, straightforward cooling
Electactic 8000 Btu Window Air
Reliable cooling for up to 350 sq ft
View on Amazon →
Upstairs bedrooms or living rooms seeking quiet, multi-mode cooling with easy setup
Antarctic Star 10,000 BTU U-Sh
Quiet operation below 41dB
View on Amazon →
Upstairs spaces up to 520 sq ft where energy efficiency and quiet operation are valued
ROVSUN 12000 BTU Window Air Co
Energy-efficient inverter compressor reduces power use by 35%
View on Amazon →
Pros & cons at a glance
LG 24,500 BTU Window Air Condi
✓ Exceptional cooling capacity suitable for large spaces
✗ Can be noisy, especially at higher speeds
Midea 12,000 BTU U-Shaped Wind
✓ Ultra-quiet operation at only 32 dBA
✗ Requires precise measurements for window fit
Electactic 8000 Btu Window Air
✓ Reliable cooling for up to 350 sq ft
✗ No specified noise level, potential concern for quiet environments
Antarctic Star 10,000 BTU U-Sh
✓ Quiet operation below 41dB
✗ Limited to window installation only
ROVSUN 12000 BTU Window Air Co
✓ Energy-efficient inverter compressor reduces power use by 35%
✗ Limited to window installation with specific size requirements
LG 6,000 BTU Window Air Condit
✓ Quiet operation at noise levels as low as 52dB
✗ Limited to cooling rooms up to 250 sq. ft.
Frigidaire 8,000 BTU Window Ai
✓ Quiet operation at 54 dBA
✗ Limited to small to medium-sized rooms, no larger spaces
LG 5000 BTU Window Air Conditi
✓ Quiet operation at 50dB
✗ Limited to small rooms up to 150 sq. ft.
Antarctic Star 12,000 BTU Wind
✓ Cools up to 550 sq. ft. efficiently
✗ Requires specific window dimensions for installation
GE Window Air Conditioner 5,00
✓ Quiet operation with 52-56 dBA
✗ Limited to rooms up to 150 sq. ft.
Tehanld 10,000 BTU U-Shaped Wi
✓ Ultra-quiet operation ideal for bedrooms and quiet spaces
✗ May require precise window measurements for perfect fit
LG 5000 BTU Window Air Conditi
✓ Easy to install in standard double-hung windows
✗ Limited to small room cooling (up to 150 sq. ft.)
ROVSUN Smart 24000 BTU Window
✓ Powerful cooling suitable for large rooms up to 1500 sq. ft.
✗ Requires confirmation of window size before purchase
Windowless Portable Air Condit
✓ Multi-function as a fan, humidifier, and cooler
✗ Limited to spaces up to 250 sq. ft.

Complete the kit

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Key Takeaways

  • High BTU ratings are essential for larger upstairs areas but can increase energy consumption and noise.
  • U-shaped models offer flexible installation options and efficient cooling in irregularly shaped rooms.
  • Quiet operation is a key feature for upstairs bedrooms, especially in shared spaces or night use.
  • Ease of installation varies widely—some units require professional setup, others are designed for DIY install.
  • Energy-saving features can significantly reduce running costs but often add to upfront purchase price.
2
Midea 12,000 BTU U-Shaped Wind
Best for Quiet, Smart Upgrades and Flexibility
1
LG 24,500 BTU Window Air Condi
Best Overall for Large Upstairs Spaces
3
Electactic 8000 Btu Window Air
Best for Small to Medium Bedrooms and Offices

Our Top Window Air Conditioner For Upstairs Picks

LG 24,500 BTU Window Air Conditioner, 230/208V, Cools 1,560 Sq. Ft., Quiet Operation, Remote, 3 Speeds, Auto Restart, 24H Timer, WhiteLG 24,500 BTU Window Air Conditioner, 230/208V, Cools 1,560 Sq. Ft., Quiet Operation, Remote, 3 Speeds, Auto Restart, 24H Timer, WhiteBest Overall for Large Upstairs SpacesCooling Capacity: 24,500 BTUVoltage: 230/208VCoverage Area: 1,560 sq. ft.VIEW ON AMAZONSee Our Full Breakdown
Midea 12,000 BTU U-Shaped Window Air ConditionerMidea 12,000 BTU U-Shaped Window Air ConditionerBest for Quiet, Smart Upgrades and FlexibilityBTU: 12,000Cooling Area: 550 sq ftNoise Level: 32 dBAVIEW ON AMAZONSee Our Full Breakdown
Electactic 8000 Btu Window Air Conditioner for Rooms up to 350 Sq.FtElectactic 8000 Btu Window Air Conditioner for Rooms up to 350 Sq.FtBest for Small to Medium Bedrooms and OfficesCooling Capacity: 8000 BTURoom Size: Up to 350 sq ftFan Speeds: 3VIEW ON AMAZONSee Our Full Breakdown
Antarctic Star 10,000 BTU U-Shaped Window Air Conditioner, Cools up to 450 Sq.Ft., 6 Modes & 24H Timer, Ultra Quiet, Energy Saving, Easy Installation, WhiteAntarctic Star 10,000 BTU U-Shaped Window Air Conditioner, Cools up to 450 Sq.Ft., 6 Modes & 24H Timer, Ultra Quiet, Energy Saving, Easy Installation, WhiteBest for Quiet, Multi-Mode Comfort in Mid-Sized SpacesCooling Capacity: 10,000 BTUCoverage Area: 450 sq ftModes: Cool, Dry, Fan, Auto, Sleep, Energy SaverVIEW ON AMAZONSee Our Full Breakdown
ROVSUN 12000 BTU Window Air Conditioner with Inverter Compressor, Remote Control, and Easy InstallationROVSUN 12000 BTU Window Air Conditioner with Inverter Compressor, Remote Control, and Easy InstallationBest for Energy Savings and Moderate Cooling NeedsCooling Capacity: 12000 BTUCoverage Area: 520 sq ftVoltage: 115V/60HzVIEW ON AMAZONSee Our Full Breakdown
LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. with Remote, Quiet OperationLG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. with Remote, Quiet OperationBest Overall for Small to Medium BedroomsBTU: 6,000Voltage: 115VCooling Capacity: 250 sq. ft.VIEW ON AMAZONSee Our Full Breakdown
Frigidaire 8,000 BTU Window Air Conditioner with Remote ControlFrigidaire 8,000 BTU Window Air Conditioner with Remote ControlBest for Medium Rooms Up to 350 Sq. Ft.Cooling Capacity: 8,000 BTUCoverage Area: Up to 350 sq. ft.Noise Level: 54 dBAVIEW ON AMAZONSee Our Full Breakdown
LG 5000 BTU Window Air Conditioner, 2023 Model, Ultra-Quiet, Compact, WhiteLG 5000 BTU Window Air Conditioner, 2023 Model, Ultra-Quiet, Compact, WhiteBest Compact for Small Upstairs RoomsCooling Capacity: 5,000 BTUCoverage Area: 150 sq. ft.Noise Level: 50 dBVIEW ON AMAZONSee Our Full Breakdown
Antarctic Star 12,000 BTU Window Air Conditioner with 6 Modes, Cools up to 550 Sq. Ft, Energy Saving, Easy Installation, WhiteAntarctic Star 12,000 BTU Window Air Conditioner with 6 Modes, Cools up to 550 Sq. Ft, Energy Saving, Easy Installation, WhiteBest for Large Upstairs Spaces or Open Plan AreasBTU: 12,000Cooling Capacity: 550 sq. ftModes: 6 (Cool, Dry, Fan, Auto, Sleep, Energy Saving)VIEW ON AMAZONSee Our Full Breakdown
GE Window Air Conditioner 5,000 BTU for Small Spaces up to 150 sq ftGE Window Air Conditioner 5,000 BTU for Small Spaces up to 150 sq ftBest Budget-Friendly Choice for Small RoomsCooling Power: 5,000 BTURoom Size: up to 150 sq ftDimensions: 16.4″ W x 13.4″ D x 12.6″ HVIEW ON AMAZONSee Our Full Breakdown
Tehanld 10,000 BTU U-Shaped Window Air Conditioner, 450 Sq.Ft Cooling, Ultra Quiet, Open Window Flexibility, Energy Saving, Remote ControlTehanld 10,000 BTU U-Shaped Window Air Conditioner, 450 Sq.Ft Cooling, Ultra Quiet, Open Window Flexibility, Energy Saving, Remote ControlBest Overall for Larger Upstairs RoomsCooling Capacity: 10,000 BTURoom Size: 450 sq. ft.Noise Level: 42dBVIEW ON AMAZONSee Our Full Breakdown
LG 5000 BTU Window Air Conditioner with Remote, Compact & Quiet, Cools 150 Sq.Ft., Easy InstallationLG 5000 BTU Window Air Conditioner with Remote, Compact & Quiet, Cools 150 Sq.Ft., Easy InstallationBest for Small Upstairs Rooms or ApartmentsCooling Capacity: 5000 BTUCoverage Area: 150 sq.ft.Installation Size: W 21″ – 35″ x H 12″VIEW ON AMAZONSee Our Full Breakdown
ROVSUN Smart 24000 BTU Window Air Conditioner with RemoteROVSUN Smart 24000 BTU Window Air Conditioner with RemoteBest for Large Upstairs Areas or Open-Plan SpacesBTU: 24000Room Size: up to 1500 sq ftVoltage: 230V/60HzVIEW ON AMAZONSee Our Full Breakdown
Windowless Portable Air Conditioner, 25.2″ Evaporative Cooler with Remote, 3 Speed, 4 Modes, Timer, Ice Packs, Quiet for BedroomWindowless Portable Air Conditioner, 25.2" Evaporative Cooler with Remote, 3 Speed, 4 Modes, Timer, Ice Packs, Quiet for BedroomBest for Rooms Without Window Access or Smaller Upstairs SpacesSize: 25.2 inchesFunctions: Fan, humidifier, evaporative coolerSpeeds: 3VIEW ON AMAZONSee Our Full Breakdown

More Details on Our Top Picks

  1. LG 24,500 BTU Window Air Conditioner, 230/208V, Cools 1,560 Sq. Ft., Quiet Operation, Remote, 3 Speeds, Auto Restart, 24H Timer, White

    LG 24,500 BTU Window Air Conditioner, 230/208V, Cools 1,560 Sq. Ft., Quiet Operation, Remote, 3 Speeds, Auto Restart, 24H Timer, White

    Best Overall for Large Upstairs Spaces

    View on Amazon

    This LG model stands out for its impressive 24,500 BTU capacity, making it ideal for cooling large upstairs areas up to 1,560 square feet. Compared to smaller units like the Electactic 8,000 BTU, this option offers much more cooling power, but at the expense of higher energy use and noise at higher speeds. Its multiple fan speeds, auto restart, and timer provide flexible comfort and convenience, though it may be noisier during peak operation. Installation could be more involved, especially if additional tools are needed. The digital controls and remote make adjustments simple, but continuous operation might lead to increased electricity bills.

    Pros:
    • Exceptional cooling capacity suitable for large spaces
    • Multiple speeds and auto restart for tailored comfort
    • Remote control and timer offer convenience
    • Easy-to-use digital interface
    Cons:
    • Can be noisy, especially at higher speeds
    • Installation may require extra effort or professional help
    • Higher energy consumption during extended use

    Best for: Homeowners with large upstairs rooms needing powerful and customizable cooling

    Not ideal for: Small apartments or bedrooms where energy efficiency and quiet operation are priorities over raw cooling capacity

    • Cooling Capacity:24,500 BTU
    • Voltage:230/208V
    • Coverage Area:1,560 sq. ft.
    • Number of Speeds:3
    • Features:Auto Restart, 24H Timer, Remote Control, 4-way Air Deflection, Washable Filter
    Our verdict
    “This unit is best for large upstairs areas where maximum cooling and flexibility justify higher energy use and potential noise.”
  2. Midea 12,000 BTU U-Shaped Window Air Conditioner

    Midea 12,000 BTU U-Shaped Window Air Conditioner

    Best for Quiet, Smart Upgrades and Flexibility

    View on Amazon

    This Midea U-shaped model offers a compelling balance of cooling power and quiet operation, ideal for smaller upstairs rooms up to 550 sq ft. Its ultra-quiet noise level of 32 dBA makes it a better choice than the louder LG 24,500 BTU for noise-sensitive spaces, and its smart Wi-Fi controls and voice compatibility provide modern convenience. Compared to the larger LG unit, it sacrifices capacity for energy efficiency and quieter operation. The flexible design with window opening allows fresh air, but precise measurements are needed for installation, and the higher price point might deter budget-conscious buyers. It’s perfect for users seeking smart, quiet cooling with moderate capacity.

    Pros:
    • Ultra-quiet operation at only 32 dBA
    • Energy savings of over 37% with ENERGY STAR certification
    • Smart control via Wi-Fi, Alexa, and Google Assistant
    • Flexible window installation allowing fresh air intake
    Cons:
    • Requires precise measurements for window fit
    • Higher price compared to non-smart models
    • Dependent on Wi-Fi for smart features

    Best for: Owners of medium-sized upstairs rooms who want quiet operation and smart features

    Not ideal for: Large upstairs spaces or those prioritizing maximum cooling power over quietness and smart connectivity

    • BTU:12,000
    • Cooling Area:550 sq ft
    • Noise Level:32 dBA
    • Control:Wi-Fi, SmartHome app, Alexa, Google Assistant
    • Window Compatibility:22-36 inches width, minimal height 13.75 inches
    Our verdict
    “This pick suits those wanting quiet, smart-controlled cooling for medium-sized upstairs rooms without sacrificing energy efficiency.”
  3. Electactic 8000 Btu Window Air Conditioner for Rooms up to 350 Sq.Ft

    Electactic 8000 Btu Window Air Conditioner for Rooms up to 350 Sq.Ft

    Best for Small to Medium Bedrooms and Offices

    View on Amazon

    This 8,000 BTU Electactic unit offers reliable cooling for rooms up to 350 sq ft, making it suitable for bedrooms or small upstairs offices. Its straightforward operation and energy-efficient rating (CEER 10.9) help keep electricity bills manageable. Unlike the larger LG or Antarctic Star units, it doesn’t specify noise levels, which could be a concern for sensitive sleepers or working environments. Installation is simplified with the included mounting kit, but its limited coverage means it’s not suitable for larger spaces. This model is a practical choice for those prioritizing ease of use and cost-effectiveness over raw cooling power.

    Pros:
    • Reliable cooling for up to 350 sq ft
    • Energy-efficient operation reduces costs
    • Easy installation with included kit
    • Programmable timer for convenience
    Cons:
    • No specified noise level, potential concern for quiet environments
    • Limited cooling capacity for larger rooms
    • No smart features included

    Best for: Small upstairs bedrooms or offices requiring efficient, straightforward cooling

    Not ideal for: Large upstairs living areas or open-plan spaces needing more capacity

    • Cooling Capacity:8000 BTU
    • Room Size:Up to 350 sq ft
    • Fan Speeds:3
    • Timer:0.5–24 hours
    • Energy Efficiency:CEER 10.9
    Our verdict
    “This model works well for small spaces where simplicity and energy savings outweigh maximum cooling capacity.”
  4. Antarctic Star 10,000 BTU U-Shaped Window Air Conditioner, Cools up to 450 Sq.Ft., 6 Modes & 24H Timer, Ultra Quiet, Energy Saving, Easy Installation, White

    Antarctic Star 10,000 BTU U-Shaped Window Air Conditioner, Cools up to 450 Sq.Ft., 6 Modes & 24H Timer, Ultra Quiet, Energy Saving, Easy Installation, White

    Best for Quiet, Multi-Mode Comfort in Mid-Sized Spaces

    View on Amazon

    The Antarctic Star 10,000 BTU U-shaped model offers effective cooling for spaces up to 450 sq ft, with the added benefit of six modes including Sleep and Energy Saver. Its noise level below 41dB makes it a strong choice for quieter upstairs bedrooms, especially compared to louder units like the LG 24,500 BTU. Its easy installation and unobstructed window view are pluses, though it’s limited to window installation and requires specific window sizes. Its lack of smart features may be a downside for tech-savvy users, but overall, it delivers versatile, quiet cooling without complex setup.

    Pros:
    • Quiet operation below 41dB
    • Multiple modes for tailored comfort
    • Easy to install without brackets
    • Unobstructed window view
    Cons:
    • Limited to window installation only
    • Requires specific window sizes for fit
    • No smart home integration

    Best for: Upstairs bedrooms or living rooms seeking quiet, multi-mode cooling with easy setup

    Not ideal for: Large open upstairs areas or users wanting advanced smart connectivity

    • Cooling Capacity:10,000 BTU
    • Coverage Area:450 sq ft
    • Modes:Cool, Dry, Fan, Auto, Sleep, Energy Saver
    • Noise Level:Below 41 dB
    • Timer:1-24 hours
    Our verdict
    “This unit is ideal for those who want quiet, multi-mode cooling in a straightforward window installation.”
  5. ROVSUN 12000 BTU Window Air Conditioner with Inverter Compressor, Remote Control, and Easy Installation

    ROVSUN 12000 BTU Window Air Conditioner with Inverter Compressor, Remote Control, and Easy Installation

    Best for Energy Savings and Moderate Cooling Needs

    View on Amazon

    The ROVSUN 12000 BTU unit combines solid cooling capacity with inverter technology, making it a good choice for upstairs rooms up to 520 sq ft where energy efficiency is a priority. Its inverter compressor reduces electricity consumption by about 35%, outperforming traditional models like the Electactic 8,000 BTU in terms of efficiency. Operating at a quiet 42dBA in sleep mode, it provides a peaceful environment. Installation is simplified with pre-installed side panels, although it’s limited to window mounting with specific size requirements. While lacking smart features, it’s well-suited for users wanting reliable, energy-conscious cooling without high tech complexity.

    Pros:
    • Energy-efficient inverter compressor reduces power use by 35%
    • Quiet operation at 42 dBA in sleep mode
    • Quick, easy installation with pre-assembled panels
    • Multiple modes including dehumidifier and fan
    Cons:
    • Limited to window installation with specific size requirements
    • No smart home integration features
    • Requires precise window dimensions (25″ – 36″)

    Best for: Upstairs spaces up to 520 sq ft where energy efficiency and quiet operation are valued

    Not ideal for: Large spaces exceeding 520 sq ft or those seeking smart home capabilities

    • Cooling Capacity:12000 BTU
    • Coverage Area:520 sq ft
    • Voltage:115V/60Hz
    • Energy Efficiency:35% more savings with inverter
    • Noise Level:42 dBA
    • Window Width:25″ – 36″
    Our verdict
    “This model offers a smart balance of energy savings and reliable cooling for upstairs rooms of moderate size.”
  6. LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. with Remote, Quiet Operation

    LG 6,000 BTU Window Air Conditioner, 115V, Cools 250 Sq.Ft. with Remote, Quiet Operation

    Best Overall for Small to Medium Bedrooms

    View on Amazon

    This LG model stands out for its quiet operation, with noise levels as low as 52dB, making it ideal for bedrooms or quiet upstairs spaces. Its multiple fan and cooling speeds allow for tailored comfort, and the auto restart feature provides peace of mind during outages. Compared to the Antarctic Star 12,000 BTU, it’s less powerful but also less bulky and easier to install in smaller rooms. The lack of smart connectivity might be a drawback for tech-savvy users who want remote app control. For those prioritizing quiet, reliable performance in rooms up to 250 sq. ft., this LG is a solid choice.

    Pros:
    • Quiet operation at noise levels as low as 52dB
    • Multiple fan and cooling speeds for customized comfort
    • Auto restart ensures continuous operation after power outages
    • Easy installation with included window kit
    Cons:
    • Limited to cooling rooms up to 250 sq. ft.
    • No smart connectivity features

    Best for: Owners of small to medium upstairs bedrooms who need quiet, dependable cooling.

    Not ideal for: Large upstairs areas exceeding 250 sq. ft. or users seeking smart home integration.

    • BTU:6,000
    • Voltage:115V
    • Cooling Capacity:250 sq. ft.
    • Fan Speeds:3
    • Features:Remote control, 2-way air deflection, auto restart, washable filter
    Our verdict
    “This model is perfect for those needing quiet, reliable cooling in small to medium upstairs rooms without smart home features.”
  7. Frigidaire 8,000 BTU Window Air Conditioner with Remote Control

    Frigidaire 8,000 BTU Window Air Conditioner with Remote Control

    Best for Medium Rooms Up to 350 Sq. Ft.

    View on Amazon

    Compared with the LG 6,000 BTU, the Frigidaire 8,000 BTU unit offers greater cooling capacity suitable for larger upstairs spaces up to 350 sq. ft. Its quiet operation at 54 dBA makes it suitable for bedrooms or living areas, and its energy-efficient modes help reduce electricity bills. The remote control and maintenance alerts add convenience, but it lacks smart features for remote app control. This pick makes the most sense for users with medium-sized upstairs rooms who want a balance of power and quietness without complicated setup.

    Pros:
    • Quiet operation at 54 dBA
    • Suitable for rooms up to 350 sq. ft.
    • Energy-efficient modes reduce power use
    • Easy remote control with maintenance alerts
    Cons:
    • Limited to small to medium-sized rooms, no larger spaces
    • No smart connectivity features

    Best for: Families or individuals with upstairs rooms between 250-350 sq. ft. needing reliable cooling.

    Not ideal for: Small bedrooms or those desiring smart home integration, as it offers no smart connectivity.

    • Cooling Capacity:8,000 BTU
    • Coverage Area:Up to 350 sq. ft.
    • Noise Level:54 dBA
    • Modes:Eco, Sleep, Dry
    • Fan Speeds:3
    Our verdict
    “Ideal for upstairs spaces up to 350 sq. ft. where quiet, efficient cooling is desired without smart controls.”
  8. LG 5000 BTU Window Air Conditioner, 2023 Model, Ultra-Quiet, Compact, White

    LG 5000 BTU Window Air Conditioner, 2023 Model, Ultra-Quiet, Compact, White

    Best Compact for Small Upstairs Rooms

    View on Amazon

    This LG 5000 BTU model is tailored for small upstairs spaces, cooling up to 150 sq. ft. efficiently. Its ultra-quiet operation at 50dB is ideal for bedrooms or cozy offices, and the washable filter simplifies maintenance. Compared to the GE 5,000 BTU unit, it offers slightly quieter operation, but its mechanical controls may feel less modern. The unit’s compact size makes installation straightforward in tight spaces, yet it’s limited in cooling capacity, which could be insufficient for larger rooms. It’s best suited for small, quiet upstairs nooks where minimal noise is a priority.

    Pros:
    • Quiet operation at 50dB
    • Easy to install with included kit
    • Energy-efficient with multiple fan speeds
    • Compact size fits small windows easily
    Cons:
    • Limited to small rooms up to 150 sq. ft.
    • Requires regular filter cleaning every 30 days
    • Mechanical controls may lack modern features

    Best for: Owners of small upstairs bedrooms or offices needing quiet, space-efficient cooling.

    Not ideal for: Large rooms over 150 sq. ft. or users preferring digital or smart controls.

    • Cooling Capacity:5,000 BTU
    • Coverage Area:150 sq. ft.
    • Noise Level:50 dB
    • Control Type:Mechanical
    • Refrigerant:R32
    Our verdict
    “Best suited for small upstairs spaces where quiet, unobtrusive cooling is a priority.”
  9. Antarctic Star 12,000 BTU Window Air Conditioner with 6 Modes, Cools up to 550 Sq. Ft, Energy Saving, Easy Installation, White

    Antarctic Star 12,000 BTU Window Air Conditioner with 6 Modes, Cools up to 550 Sq. Ft, Energy Saving, Easy Installation, White

    Best for Large Upstairs Spaces or Open Plan Areas

    View on Amazon

    This Antarctic Star 12,000 BTU unit offers substantial cooling power for larger upstairs areas up to 550 sq. ft., making it a strong choice for open lofts or big bedrooms. Its six modes, including Sleep and Energy Saving, provide versatile climate control, and its quiet operation below 41dB stands out. Compared to smaller options like the LG 6,000 BTU, it’s more capable but requires a larger window and more space for installation. The absence of smart controls might be a downside for those wanting remote app access. This model makes sense for bigger upstairs zones where power and flexibility are needed without sacrificing noise levels.

    Pros:
    • Cools up to 550 sq. ft. efficiently
    • Very quiet operation below 41dB
    • Multiple modes for versatile comfort
    • Easy to install with minimal fuss
    Cons:
    • Requires specific window dimensions for installation
    • Larger unit may be less suitable for small spaces

    Best for: Owners of large, open upstairs rooms or lofts up to 550 sq. ft. seeking quiet, multi-mode operation.

    Not ideal for: Small bedrooms or users seeking smart home features, as it lacks connectivity options.

    • BTU:12,000
    • Cooling Capacity:550 sq. ft
    • Modes:6 (Cool, Dry, Fan, Auto, Sleep, Energy Saving)
    • Noise Level:Below 41dB
    • Window Width Compatibility:24-48 inches
    Our verdict
    “This unit is ideal for large upstairs zones where power, quietness, and flexibility are priorities.”
  10. GE Window Air Conditioner 5,000 BTU for Small Spaces up to 150 sq ft

    GE Window Air Conditioner 5,000 BTU for Small Spaces up to 150 sq ft

    Best Budget-Friendly Choice for Small Rooms

    View on Amazon

    The GE 5,000 BTU unit offers a straightforward cooling option for small upstairs rooms of about 150 sq. ft. It features simple mechanical controls and a washable filter, making it easy for basic needs. Compared with the LG 6,000 BTU, it’s less powerful but also slightly more affordable and compact. Its noise levels are comparable, but manual operation may feel limiting for modern users seeking digital controls or smart features. Best for budget-conscious buyers or those who prefer simple, reliable operation without fuss in small upstairs bedrooms.

    Pros:
    • Quiet operation with 52-56 dBA
    • Easy to install with included kit
    • Mechanical controls for simplicity
    • Low energy consumption
    Cons:
    • Limited to rooms up to 150 sq. ft.
    • No digital or remote controls
    • Manual operation only

    Best for: Owners of small upstairs bedrooms or offices who prefer manual controls and straightforward operation.

    Not ideal for: Large rooms or users wanting smart, app-controlled features.

    • Cooling Power:5,000 BTU
    • Room Size:up to 150 sq ft
    • Dimensions:16.4″ W x 13.4″ D x 12.6″ H
    • Power Consumption:440W
    • Control Type:Mechanical
    Our verdict
    “A reliable, budget-friendly option for small upstairs spaces needing basic cooling.”
  11. Tehanld 10,000 BTU U-Shaped Window Air Conditioner, 450 Sq.Ft Cooling, Ultra Quiet, Open Window Flexibility, Energy Saving, Remote Control

    Tehanld 10,000 BTU U-Shaped Window Air Conditioner, 450 Sq.Ft Cooling, Ultra Quiet, Open Window Flexibility, Energy Saving, Remote Control

    Best Overall for Larger Upstairs Rooms

    View on Amazon

    This Tehanld model stands out for offering quiet, efficient cooling for rooms up to 450 sq. ft., making it a strong contender for upstairs bedrooms or living areas where noise can be disruptive. Compared with the Antarctic Star 10,000 BTU U-shaped AC, it provides lower noise levels at just 42dB, ideal for sensitive spaces. Its U-shaped design offers flexible installation options and a full view, but precise measurements may be needed to ensure a perfect fit. While it excels in energy savings and quiet operation, performance could decline in extremely hot climates, requiring consideration if your upstairs space regularly hits high temperatures.

    Pros:
    • Ultra-quiet operation ideal for bedrooms and quiet spaces
    • Energy-efficient with 37% less energy use than standard models
    • Flexible U-shaped design fits most windows and provides full view
    • Easy to install with remote control and washable filter
    Cons:
    • May require precise window measurements for perfect fit
    • Limited to window installation, not suitable for wall mounting
    • Performance may decline in extremely hot climates

    Best for: Upstairs bedrooms or quiet living spaces needing efficient, low-noise cooling

    Not ideal for: Homes with irregular window sizes or spaces hotter than 95°F, where performance may suffer

    • Cooling Capacity:10,000 BTU
    • Room Size:450 sq. ft.
    • Noise Level:42dB
    • Energy Efficiency:37% less energy than standard models
    • Modes:Cool, Dry, Fan, Sleep, Auto, Energy Saver
    • Installation:Fits most sliding and double-hung windows
    Our verdict
    “A versatile, quiet choice for upstairs rooms where space and noise are critical concerns.”
  12. LG 5000 BTU Window Air Conditioner with Remote, Compact & Quiet, Cools 150 Sq.Ft., Easy Installation

    LG 5000 BTU Window Air Conditioner with Remote, Compact & Quiet, Cools 150 Sq.Ft., Easy Installation

    Best for Small Upstairs Rooms or Apartments

    View on Amazon

    This LG unit is perfect for small upstairs bedrooms or compact spaces, offering 5000 BTU cooling capacity with quiet operation. Its size makes it easier to install in standard double-hung windows, and the remote control adds convenience. Unlike the larger Tehanld, its cooling is limited to 150 sq. ft., making it ideal for guest rooms or small offices. While it’s simple to operate and maintain with a washable filter, it lacks advanced features like programmable timers, which might be a downside for those seeking more automation. Overall, this model is a straightforward, space-saving option for small upstairs areas.

    Pros:
    • Easy to install in standard double-hung windows
    • Quiet operation suitable for bedrooms and small spaces
    • Remote control for convenient operation
    • Washable filter simplifies maintenance
    Cons:
    • Limited to small room cooling (up to 150 sq. ft.)
    • No programmable timer or advanced features
    • Requires regular filter cleaning for optimal performance

    Best for: Small upstairs bedrooms, guest rooms, or compact offices needing basic, quiet cooling

    Not ideal for: Large or open upstairs living spaces over 150 sq. ft., where this unit cannot provide sufficient cooling

    • Cooling Capacity:5000 BTU
    • Coverage Area:150 sq.ft.
    • Installation Size:W 21″ – 35″ x H 12″
    • Refrigerant:R32
    • Control:Remote with LCD display
    • Fan Speeds:2
    Our verdict
    “A compact, quiet choice for small upstairs rooms where space and simplicity are priorities.”
  13. ROVSUN Smart 24000 BTU Window Air Conditioner with Remote

    ROVSUN Smart 24000 BTU Window Air Conditioner with Remote

    Best for Large Upstairs Areas or Open-Plan Spaces

    View on Amazon

    This ROVSUN model delivers powerful cooling, covering up to 1500 sq. ft., making it suitable for large upstairs rooms or open-plan layouts. Its 24000 BTU capacity surpasses many smaller units, ensuring consistent comfort even in very hot weather. It includes a remote control and multiple modes like Sleep, Eco, and Auto, adding flexibility. Unlike the smaller units, it does not specify noise levels, which could be a concern if quiet operation is needed. Its straightforward installation and eco-friendly design are strong points, but buyers should verify window size compatibility before purchase. This makes it ideal for larger upstairs spaces that demand a more robust cooling solution.

    Pros:
    • Powerful cooling suitable for large rooms up to 1500 sq. ft.
    • Easy to operate via remote and LED display
    • Energy-efficient with eco-friendly refrigerant
    • Simple installation process
    Cons:
    • Requires confirmation of window size before purchase
    • No noise level information provided
    • Could be overpowered for small spaces, wasting energy

    Best for: Large upstairs rooms or open spaces needing high-capacity cooling and flexible operation

    Not ideal for: Small bedrooms or spaces with limited window size, where the unit’s size might be impractical

    • BTU:24000
    • Room Size:up to 1500 sq ft
    • Voltage:230V/60Hz
    • Remote Control:Yes
    • Modes:Sleep, Eco, Auto, Fan
    • Warranty:1 year
    Our verdict
    “An excellent choice for large upstairs areas needing strong, reliable cooling with modern controls.”
  14. Windowless Portable Air Conditioner, 25.2″ Evaporative Cooler with Remote, 3 Speed, 4 Modes, Timer, Ice Packs, Quiet for Bedroom

    Windowless Portable Air Conditioner, 25.2" Evaporative Cooler with Remote, 3 Speed, 4 Modes, Timer, Ice Packs, Quiet for Bedroom

    Best for Rooms Without Window Access or Smaller Upstairs Spaces

    View on Amazon

    This portable evaporative cooler offers a different cooling approach, providing moisture-rich airflow suitable for bedrooms or living rooms where window access is limited or non-existent. Its 25.2-inch size and mobility allow placement anywhere, and it’s designed to operate quietly at just 36.9dB, making it a good match for upstairs bedrooms. Unlike traditional window units, it adds humidity, which can be a benefit or drawback depending on your climate. Its capacity is limited to about 250 sq. ft., and regular refilling of water and ice packs is necessary for optimal performance. This unit is best for those who prioritize flexibility and quieter operation over raw cooling power.

    Pros:
    • Multi-function as a fan, humidifier, and cooler
    • Quiet operation suitable for sleeping
    • No window installation required for setup
    • Includes ice packs for enhanced cooling
    Cons:
    • Limited to spaces up to 250 sq. ft.
    • Requires regular refilling of water and ice packs
    • Performance varies with environmental conditions

    Best for: Bedrooms or living spaces without window access that need a quiet, multi-function cooling option

    Not ideal for: Very dry or hot environments where evaporative cooling is less effective or for larger spaces over 250 sq. ft.

    • Size:25.2 inches
    • Functions:Fan, humidifier, evaporative cooler
    • Speeds:3
    • Modes:4
    • Timer:1–7 hours
    • Water Tank Capacity:High-capacity (up to 8 hours of cooling)
    Our verdict
    “A flexible, quiet alternative for upstairs bedrooms or smaller living areas without window access.”
window air conditioner for upstairs
What makes a great window air conditioner for upstair
1
Cooling Capacity (BTU)
The primary factor is cooling capacity, measured in BTUs.
2
Noise Levels
Since upstairs bedrooms or living areas are often used for sleep or relaxation, noise level is a crucial consideration.
3
Energy Efficiency
Energy-efficient models with features like inverter compressors or ENERGY STAR certification can significantly cut running costs o
4
Ease of Installation
Many upstairs window units require precise installation, which can range from simple DIY setups to more complex tasks needing prof
How to choose your window air conditioner for upstair
1
How we picked
In selecting these window air conditioners, I prioritized cooling capacity, noise levels, energy efficiency, ease of ins
2
Cooling Capacity (BTU)
The primary factor is cooling capacity, measured in BTUs.
3
Noise Levels
Since upstairs bedrooms or living areas are often used for sleep or relaxation, noise level is a crucial consideration.
4
Energy Efficiency
Energy-efficient models with features like inverter compressors or ENERGY STAR certification can significantly cut runni
5
Ease of Installation
Many upstairs window units require precise installation, which can range from simple DIY setups to more complex tasks ne
Vetted window air conditioner for upstairs ·
The best window air conditioner for upstairs, compared
★ Winner LG 24,500 BTU Window Air Condi
Best Overall for Large Upstairs Spaces
14compared

How We Picked

In selecting these window air conditioners, I prioritized cooling capacity, noise levels, energy efficiency, ease of installation, and value for money. Larger BTU ratings were favored for upstairs spaces where cooling needs are typically higher, but models with energy-saving features and quiet operation were also highly rated. Ease of installation was a key consideration, especially for homeowners who prefer a DIY approach. The ranking reflects a balance between performance and practicality, aiming to recommend units that fit various budget levels and room sizes while avoiding overly complex or underpowered models.
Everyday → specialist
Everyday & valuePremium & specialist
Which window air conditioner for upstair fits you?
The everyday user
All-round, reliable
The enthusiast
Premium & high-performance
The gift-giver
Looks & craftsmanship

Factors to Consider When Choosing Window Air Conditioner For Upstairs

Choosing the right window air conditioner for upstairs use involves understanding several critical factors. Since upstairs rooms often face different cooling challenges than ground-level spaces, selecting a unit that balances power, noise, and installation considerations is key. My guide highlights the most important aspects to consider before making your purchase, helping you avoid common pitfalls and find the best fit for your specific needs.

Cooling Capacity (BTU)

The primary factor is cooling capacity, measured in BTUs. Larger BTU ratings mean more powerful cooling, which is necessary for bigger or hotter upstairs rooms. However, overspending on BTU can lead to unnecessary energy use and higher costs. Smaller units are ideal for bedrooms or smaller spaces, while larger rooms need higher capacity units to maintain comfort without overworking the system. Matching BTU to your room size ensures efficient and effective cooling without excess energy consumption.

Noise Levels

Since upstairs bedrooms or living areas are often used for sleep or relaxation, noise level is a crucial consideration. Look for units specifically designed for quiet operation, especially if the AC will run overnight. Some units advertise ultra-quiet features, but real-world performance varies. Choosing a model with noise ratings below 55 decibels can help maintain a peaceful environment. Keep in mind that larger, more powerful units tend to be noisier, so balance your cooling needs with comfort.

Energy Efficiency

Energy-efficient models with features like inverter compressors or ENERGY STAR certification can significantly cut running costs over time. These units often have smart timers and eco modes, which prevent unnecessary operation and reduce electricity bills. While they might cost more upfront, the long-term savings often justify the investment. Be wary of cheaper models that lack efficiency features, as they can lead to higher bills and more frequent maintenance.

Ease of Installation

Many upstairs window units require precise installation, which can range from simple DIY setups to more complex tasks needing professional help. Consider how accessible your window area is, and whether the unit comes with clear instructions or installation kits. U-shaped models or units with flexible mounting options can simplify setup. Avoid overly complicated installations if you’re not comfortable with tools or want a quick setup, as improper installation can reduce efficiency and cause damage.

Additional Features and Controls

Features like remote controls, programmable timers, multiple fan speeds, and modes such as dehumidify or sleep can enhance usability. For upstairs rooms, remote operation and programmable timers are especially handy to adjust settings without frequent manual intervention. However, extra features often add to the cost; prioritize those that align with your lifestyle and room usage. Consider also the ease of cleaning filters and maintaining the unit to ensure long-term performance.

Frequently Asked Questions

Can I install a window air conditioner myself in an upstairs window?

Many window air conditioners are designed for DIY installation, but the complexity depends on the unit and window type. U-shaped or sliding models often come with installation kits and clear instructions, making setup manageable for most homeowners. However, if your window is hard to access, or you’re unsure about securing the unit safely, hiring a professional might be safer. Proper installation ensures efficiency, safety, and prevents damage to the window or unit over time.

How do I choose the right BTU for my upstairs room?

To select the appropriate BTU, measure your room’s square footage and consider insulation and sunlight exposure. Larger rooms or those with poor insulation require higher BTU ratings to maintain comfort. For typical bedrooms up to 150 sq ft, a 5,000-8,000 BTU unit might suffice, while larger spaces up to 1,500 sq ft could need 20,000+ BTU units. Overestimating BTU can waste energy, so aim for a balanced match based on your specific room size and conditions.

Are U-shaped window units better for upstairs installation?

U-shaped window units offer greater flexibility and often easier installation in irregular or larger windows, which are common upstairs. They can also provide better sealing and stability, reducing drafts and energy loss. However, they tend to be more expensive and may require more space or window modifications. If your upstairs window has an unusual shape or size, a U-shaped model might be worth the extra effort, but for standard windows, traditional units are usually sufficient.

What features should I prioritize for a bedroom upstairs?

For upstairs bedrooms, prioritize quiet operation, adjustable fan speeds, and sleep modes to ensure comfort without disturbance. Remote controls and programmable timers add convenience for nighttime adjustments. Energy efficiency is also important to keep bills manageable, especially if the unit runs frequently. Additionally, look for units with filters that are easy to clean, as maintaining air quality is beneficial in sleeping areas.

Is it worth paying extra for energy-efficient models?

Investing in energy-efficient window air conditioners can lead to significant savings over the lifespan of the unit. They consume less power, which translates into lower electricity bills, and often feature better components that last longer. Although the initial cost may be higher, the return on investment through savings and reduced environmental impact makes these models a smart choice, especially if the unit will run frequently during hot months.

Conclusion

For those seeking the best overall performance, the LG 24,500 BTU Window Air Conditioner stands out, ideal for large upstairs living spaces. Budget-conscious buyers should consider the GE 5,000 BTU Model for smaller rooms, offering reliable cooling at a lower price. If quiet operation is your top priority, the Antarctic Star 10,000 BTU Ultra Quiet Unit makes a strong case. For first-time buyers or those valuing ease of installation, models like the LG 6,000 BTU Quiet Unit offer straightforward setup. Finally, for larger or irregular spaces, the ROVSUN Smart 24,000 BTU Unit delivers powerful cooling with smart features. Tailor your choice based on your room size, noise tolerance, and budget to find the best fit for your upstairs space in 2026.

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