Finding the best attic fan with a thermostat often comes down to balancing performance, ease of use, and energy efficiency. The Master Flow GAF 1500 CFM stands out as the overall top pick for its durable construction and reliable temperature control. For those seeking quiet operation, the Quietcool AFR SMT ES-2.0 offers smart app control and low wattage. Meanwhile, solar options like the QuietCool AFG SLR-40 appeal for energy-conscious homes. Each choice involves weighing factors like installation complexity, power source, and adjustable features. Continue reading for a full breakdown of these models and how to pick the right one for your attic needs.
Key Takeaways
- Top attic fans combine high airflow with smart thermostat controls for customizable comfort.
- Solar-powered models provide excellent energy efficiency but may have limited power output compared to wired options.
- More sophisticated fans with app control tend to be easier to operate but can come with a higher price tag.
- Durability and build quality are key for long-term operation, especially in harsher climates.
- Choosing the right size and airflow capacity depends on your attic’s square footage and ventilation needs.
More Details on Our Top Picks
Master Flow GAF 1500 CFM Powered Roof Mount Attic Fan with Thermostat Controller for Up to 2800 Sq Ft | Durable Galvanized Steel Construction | Built-In Screen – ERV6BL
This attic fan stands out for its combination of high airflow capacity and reliable durability. Capable of ventilating up to 2,800 square feet, it surpasses many standard models like the QuietCool AFG SLR-40 in sheer power, making it ideal for larger attics. The built-in thermostat and humidistat ensure it activates only when necessary, improving energy efficiency. Its galvanized steel construction guarantees long-term performance, and the easy installation adds to its appeal. However, the unit is relatively bulky and requires a sturdy mounting surface, which could complicate installation in certain roofs. Compared to the QuietCool models, this fan’s larger airflow makes it better suited for big spaces, but it may be overkill for smaller attics. The tradeoff is a slightly higher energy use than smaller fans, though still efficient given its capacity.
Pros:- High airflow capacity up to 1500 CFM for large attics
- Durable galvanized steel construction with long warranty
- Built-in thermostat and humidistat for automatic operation
Cons:- Bulkier size may complicate installation on certain roofs
- Higher energy consumption at maximum airflow compared to smaller fans
Best for: Homeowners with large attic spaces up to 2800 sq ft needing reliable, thermostat-controlled ventilation.
Not ideal for: Small attic spaces or budget-conscious buyers seeking a compact or less expensive fan, as this model is bulkier and pricier.
- CFM:1500
- Coverage Area:2800 sq ft
- Construction:Galvanized Steel
- Thermostat:Built-in
- Humidistat:Yes
- Motor Warranty:15 years
Bottom line: This model makes the most sense for large attic spaces where consistent, automatic temperature and humidity control are priorities.
Quietcool AFR SMT ES-2.0 Roof Mount Smart Attic Fan – Up to 1950 CFM – As low as 25 Watts – Smart App Control – Thermostat and Humidistat – 20ft Power Cord – Plug-and-play – Three Speed
This fan excels in energy efficiency and smart features, making it ideal for mid-sized attics. With a maximum airflow of 1950 CFM, it outperforms smaller models like the QuietCool AFG PRO-2.0 but is less suited for very large spaces. The app control and preset thermostat offer automation, which is especially appealing for tech-savvy users wanting remote management. Its low power consumption—only 25 watts at low speed—reduces energy costs, while the plug-and-play design simplifies installation. The fan’s three-speed options provide flexibility, but at higher speeds, it can get somewhat noisy compared to quieter models like the QuietCool AFG SMT ES-3.0. The tradeoff involves slightly lower airflow capacity but benefits from smart features and lower energy use, perfect for users who prioritize convenience and moderate attic sizes.
Pros:- Energy-efficient operation at as low as 25 watts
- Smart app control for remote operation and automation
- Preset thermostat and humidistat for automatic activation
Cons:- Maximum airflow of 1950 CFM may be insufficient for very large attics
- Some users might find the unit slightly noisier at higher speeds
Best for: Attic owners seeking smart, energy-efficient ventilation for attics up to around 2000 sq ft with remote control features.
Not ideal for: Large attics exceeding 2000 sq ft or those preferring a completely wired, non-app-controlled system, as this model relies on smart app features.
- CFM:1950
- Power Consumption:25 Watts
- Control:Smart App
- Speeds:3
- Wiring:Plug-and-play
- Length of Power Cord:20 ft
Bottom line: This fan is ideal for users wanting smart, efficient operation in medium-sized attics with remote monitoring capability.
QuietCool AFG SLR-40 Solar Attic Fan for Gable Vents – 40 Watt Adjustable Panel – Included AC/DC Inverter for 24/7 Runtime – Thermostat Controlled
This solar-powered attic fan shines for its eco-friendly operation and ease of installation. With a 40-watt adjustable solar panel and included inverter, it provides continuous ventilation even during overcast days, a feature that sets it apart from purely roof-mount fans like the Maxx Air model. Its thermostat control ensures it activates only when needed, conserving energy, and the 2801 CFM airflow capacity makes it suitable for attics up to 2,800 sq ft. Its solar panel’s adjustability allows for optimal sun exposure, which is a great advantage over fixed panels. However, its reliance on sunlight can limit performance during cloudy weather, and the overall size might require a bit of space for mounting. Compared to electric models, this fan’s biggest advantage is its zero energy cost, making it perfect for eco-conscious homeowners willing to accept some variability depending on weather conditions.
Pros:- Solar panel with adjustable tilt for optimal sun exposure
- Continuous 24/7 operation with inverter
- Thermostat control for automatic activation
Cons:- Performance depends on sunlight availability, which can vary
- Larger installation space needed for mounting the panel
Best for: Homeowners seeking an eco-friendly, solar-powered ventilation solution for medium to large attics with good sun exposure.
Not ideal for: Areas with frequent cloud cover or shaded roofs, where solar panel efficiency could be compromised, or buyers preferring wired fans for consistent airflow.
- CFM:2801
- Panel Wattage:40 Watts
- Operation:Solar with inverter
- Control:Thermostat
- Adjustable Panel:Yes
- Coverage Area:Up to 2800 sq ft
Bottom line: This fan is an excellent choice for eco-conscious homeowners wanting solar efficiency with the flexibility of continuous operation.
Quietcool AFG SMT ES-3.0 Smart Attic Fan for Gable Vents – Up to 2801 CFM – As low as 22 Watts – Smart App Control – Thermostat and Humidistat – 20ft Power Cord – Plug-and-play – Three Speed
This attic fan combines a high airflow capacity with smart features, making it perfect for large or demanding attic spaces. Able to move up to 2801 CFM, it outperforms many traditional fans like the Maxx Air model, especially for sizable attics. Its app control, thermostat, and humidistat automation provide a high level of convenience, while the low power consumption—only 22 watts at the lowest speed—enhances energy savings. The plug-and-play setup simplifies installation, and the three-speed options allow for tailored airflow. However, this model’s noise level at high speeds can reach 45 decibels, which might be noticeable in quiet homes. It’s a tradeoff between top-tier airflow and a slightly louder operation than some smaller or more basic models. This fan is ideal for tech-savvy users with large attics, looking for smart, powerful, and efficient ventilation.
Pros:- High airflow capacity up to 2801 CFM for large attics
- Smart app control with automation features
- Low power consumption at 22 watts in low speed
Cons:- Higher noise levels at maximum speed (~45 dB)
- Price may be higher due to advanced features
Best for: Large attic owners seeking smart, high-capacity ventilation with remote control and automation features.
Not ideal for: Homeowners with smaller attics or those sensitive to noise, as the higher airflow speeds can produce noticeable sound levels.
- CFM:2801
- Power Usage:22-148 Watts
- Control:App & Thermostat
- Speeds:3
- Wiring:Plug-and-play
- Noise Level:45 dB
Bottom line: This fan is best suited for those wanting maximum airflow combined with smart control features in large attic spaces.
Maxx Air Professional Grade Gable Mount | Power Attic Ventilator, 2.6-Amp 60-Hz Motor and 14-Inch Blade | Quiet Home Attic Fan 1300 CFM | 1,850 SQ. FT. (Red)
This model offers solid performance at an attractive price point, making it ideal for smaller or budget-conscious homes. With a capacity of 1300 CFM, it effectively ventilates attics up to approximately 1,850 sq ft, which suits many typical residential spaces. Its galvanized steel construction ensures durability, and the thermostat helps prevent overcooling or overheating. The 14-inch blade provides efficient airflow while maintaining a relatively quiet operation compared to larger, more powerful fans. Compared to the larger-capacity QuietCool models, this fan is more affordable but sacrifices some airflow capacity and advanced features. The tradeoff is a slightly lower maximum CFM, making it better suited for smaller attics or spaces where budget limits options, but it still delivers reliable temperature regulation and noise control.
Pros:- Cost-effective with good performance for smaller attics
- Galvanized steel durable construction
- Thermostat control for automatic operation
Cons:- Lower airflow capacity limits use in larger attics
- Less advanced features compared to high-end models
Best for: Homeowners with modest attic sizes up to about 1850 sq ft seeking a cost-effective, thermostat-controlled ventilation solution.
Not ideal for: Large or heavily insulated attics, or anyone needing high-capacity airflow, as this model’s 1300 CFM may be insufficient.
- CFM:1300
- Motor:2.6 Amp
- Coverage Area:1850 sq ft
- Blade Size:14 inches
- Material:Galvanized Steel
- Control:Thermostat
Bottom line: This fan makes a sensible choice for budget-conscious homeowners with smaller attics in need of reliable, thermostat-controlled ventilation.
Quietcool AFG PRO-2.0 Attic Fan for Gable Vents – 1945 CFM – Adjustable Thermostat – 20ft Power Cord – Plug-and-play – Two Speed Capable
This model earns its place as the best overall due to its plug-and-play design and adjustable thermostat range of 50º to 120º, making installation straightforward for most homeowners. Its dual-speed capability allows for flexible ventilation control, outperforming simpler single-speed fans like the iLiving ILG8G14-12T which lack multiple speed options. Compared to the QuietCool AFR SMT ES-2.0, it offers a similar power but with a more user-friendly setup, though it trades off some smart features. The built-in fire safety shutoff adds peace of mind, but the fan’s size and placement might limit options for tighter spaces. This pick makes the most sense for homeowners seeking reliable, easy-to-install attic ventilation with adjustable control.
Pros:- Simple plug-and-play setup with no wiring required
- Adjustable thermostat from 50º to 120º for customized control
- Two-speed operation for flexible ventilation
Cons:- No smart controls or humidity sensors
- Larger size may not fit in very tight attic spaces
Best for: DIY homeowners or those seeking a quick, hassle-free installation without sacrificing performance.
Not ideal for: Users who prefer smart app control or integrated humidistats, as this model lacks those features.
- CFM:1945
- Motor Type:Permanent Split Capacitor (PSC)
- Thermostat Range:50º to 120º
- Power Cord Length:20 ft
- Number of Speeds:Two
- Wattage:108W at Speed 1, 77W at Speed 2
Bottom line: Ideal for homeowners wanting an easy-to-install, reliable attic fan with adjustable thermostat and dual speeds.
Ventamatic XXFIRESTAT 10-Amp Adjustable Programmable Thermostat with Firestat for Power Attic Ventilators, Replacement Thermostat , White
This product stands out as the best choice for replacing or upgrading older thermostats, controlling up to three units with a 10-amp capacity. Its adjustable bi-metallic switch covers a broad range of 50º to 120º, similar to the Quietcool AFG PRO-2.0, but it requires integration into existing systems rather than standalone operation. Unlike the Quietcool AFG PRO-2.0, it doesn’t include a fan but offers a durable, long-lasting design with a 10-year warranty. This makes it better suited to users who already have compatible fans and need a reliable, adjustable control device. The fixed fire stat at 183º provides safety but limits customization for fire safety thresholds.
Pros:- Controls up to three fans with 10A capacity
- Adjustable temperature range from 50º to 120º
- Long-lasting 10-year warranty
Cons:- No integrated fan or smart features
- Limited to controlling existing systems, not standalone fans
Best for: Homeowners or contractors replacing or upgrading thermostats in existing attic ventilation systems.
Not ideal for: Those looking for a complete fan solution with integrated control, as this is just a thermostat.
- Amp Capacity:10A
- Temperature Range:50º to 120º
- Fire Safety Limit:183º
- Control Type:Bi-metallic switch
- Warranty:10 years
- Color:White
Bottom line: Best for upgrading or replacing thermostats in existing attic fans needing reliable, adjustable control.
iLiving ILG8G14-12T Automatic Gable Mount Attic Ventilator Fan with Adjustable Thermostat, 2.85 Amp, 2339 CFM, Single-Speed
This fan delivers solid performance at a more affordable price point, with a capacity of 2339 CFM suitable for up to 3400 sq. ft. of attic space. Its automatic thermostat adapts to temperature changes, similar to the QuietCool AFG PRO-2.0, but without multiple speed options. Its galvanized steel housing ensures durability, though it’s a single-speed fan, which means less control flexibility compared to dual-speed models. The fan’s straightforward design suits budget-conscious homeowners who want decent airflow without extra bells and whistles. However, the lack of smart features or humidistats limits its versatility in more complex ventilation setups. Overall, this is a reliable, cost-effective choice for basic attic ventilation needs.
Pros:- Affordable price point
- Automatic thermostat for temperature-based activation
- Durable galvanized steel housing
Cons:- Single speed only, less control flexibility
- No smart or humidistatic features
Best for: Budget-conscious homeowners seeking a reliable, thermostat-controlled fan for moderate attic sizes.
Not ideal for: Users wanting variable speeds or smart app control, as this model is a basic single-speed unit.
- CFM:2339
- Power:2.85A
- Size:14 inches diameter
- Coverage Area:Up to 3400 sq ft
- Speed:Single
- Material:Galvanized Steel
Bottom line: Great for budget-minded homeowners needing a straightforward, thermostat-controlled attic fan.
Quietcool AFG SMT PRO-3.0 Smart Attic Fan for Gable Vents – 2940 CFM – Smart App Control – Thermostat and Humidistat – 20ft Power Cord – Plug-and-play – Two Speed
This pick excels in its smart app control and combination of thermostat and humidistat for optimized attic ventilation. With a high airflow capacity of 2940 CFM, it outperforms many single-speed fans like the Cool Attic CX2500, offering advanced automation for energy savings. Its two-speed operation and smart features allow for precise, remote management, although it comes at a higher price point. Unlike the Quietcool AFG PRO-2.0, it adds humidity sensors, making it better suited for attics prone to moisture issues. However, the complexity of setup and reliance on app connectivity could be a drawback for less tech-savvy users. This product makes the most sense for those seeking maximum control and automation.
Pros:- Smart app control with scheduling and remote operation
- Thermostat and humidistat for optimal climate management
- High airflow capacity of 2940 CFM
Cons:- Higher cost compared to basic models
- Requires Wi-Fi and app setup, which may be complex for some
Best for: Tech-savvy homeowners or those wanting automated, humidity-aware attic ventilation.
Not ideal for: Users who prefer simple, manual operation or have limited Wi-Fi connectivity, as setup and reliance on app control are essential.
- CFM:2940
- Power:264W
- Control:Smart app, thermostat, humidistat
- Wiring:Plug-and-play
- Speed:Two
- Cord Length:20 ft
Bottom line: Best suited for homeowners seeking advanced automation, remote control, and moisture management in attic ventilation.
Cool Attic CX2500 Gable Mount Power Attic Ventilator with 3.0-Amp 60-Hz Motor and 14-Inch Blade
The Cool Attic CX2500 offers a solid balance of power and durability, with a 1650 CFM airflow suitable for attics up to 2500 sq. ft., making it a strong alternative to the QuietCool AFG PRO-2.0. Its galvanized steel construction and automatic thermostat provide reliable performance, especially for larger or more demanding attic spaces. Compared to the Quietcool AFG PRO-2.0, it’s less quiet but more robust in power and build quality, though it doesn’t include smart features or multiple speeds. Its easy installation process and durable design make it a good choice for homeowners with larger attics looking for consistent ventilation without complex controls. This model suits those prioritizing raw power and straightforward operation.
Pros:- Powerful 1650 CFM airflow for large attics
- Durable galvanized steel housing
- Automatic thermostat for temperature regulation
Cons:- No smart features or humidity control
- Potentially noisier than smaller fans
Best for: Homeowners with larger attics or seeking a durable, high-capacity gable vent fan.
Not ideal for: Users wanting smart controls, variable speeds, or smaller installation footprints, as this is a fixed, high-power model.
- CFM:1650
- Motor Power:3.0A
- Blade Size:14 inches
- Coverage Area:Up to 2500 sq ft
- Material:Galvanized Steel
- Control:Automatic thermostat
Bottom line: Ideal for those needing a strong, reliable power attic ventilator for large spaces without requiring smart automation.
15″ Attic Fan with Thermostat & Remote Control, 1800 CFM Gable Vent Exhaust Fan, Auto On/Off Based on Temperature, 2500 Sq Ft Coverage, 70W, 3 Speeds, 18-Hour Timer, Plug-and-Play
This attic fan stands out for its combination of high airflow, automatic thermostat control, and remote operation, making it a versatile choice for homeowners who want convenience and efficient ventilation. Compared to the Quietcool AFR SMT ES-2.0, which offers smart app control but slightly lower airflow, this model’s remote control and three-speed options provide more immediate, tactile adjustments. The plug-and-play design simplifies installation, but its 70W motor, while powerful, results in higher energy use than some smaller units. The corrosion-resistant galvanized frame and wide blades ensure durability in humid environments, yet the unit’s size and wiring requirements could challenge DIYers with limited experience. This fan is ideal for homeowners seeking a user-friendly, feature-rich attic ventilation solution.
Pros:- Powerful airflow of 1800 CFM effectively exhausts heat and moisture
- Includes remote control with a 65-foot range for convenient operation
- Automatic thermostat with multi-speed settings reduces energy costs
- Corrosion-resistant galvanized steel construction for durability
Cons:- Higher wattage at 70W, leading to increased energy consumption
- Size and wiring may be challenging for DIY installation
- More expensive than basic models without smart features
Best for: Homeowners who prioritize ease of installation, remote control operation, and thermostat automation in their attic fans.
Not ideal for: Those with limited electrical skills or small attics, as the unit’s size and wiring complexity may be a hurdle.
- Airflow Capacity:1800 CFM
- Power Wattage:70W
- Coverage Area:2500 sq ft
- Speed Settings:3 speeds
- Timer:18 hours
- Control Type:Remote control
- Construction Material:Galvanized steel
- Installation:Plug-and-play
Bottom line: This fan suits homeowners seeking a reliable, feature-packed attic exhaust with remote control and smart thermostat capabilities.
iLIVING 12″ Wall Mounted Shutter Exhaust Fan, Automatic Shutter, with Thermostat and Variable Speed controller, 0.6A, 960 CFM, 1400 SQF Coverage Area Silver (ILG8SF12V-ST)
This model excels in industrial and commercial settings, offering a robust 960 CFM airflow with adjustable speed and thermostat control, making it ideal for garages, warehouses, or greenhouses. Unlike the 15″ Attic Fan, which is optimized for residential attics, the ILG8SF12V-ST’s wall-mounted design and durable galvanized steel frame suit larger, more demanding spaces. Its variable speed feature and thermal control range from 32 to 130°F enable precise climate management, but its lower wattage of 65W means less energy consumption—yet it may not be sufficient for very large or heavily insulated attics. The automatic shutters enhance safety and durability, but installation requires electrical wiring and mounting, making it less plug-and-play than some attic-specific units. This fan is a strong choice for those needing industrial-grade ventilation with customizable control.
Pros:- High airflow of 960 CFM for large or commercial spaces
- Variable speed control with thermostat for precise climate regulation
- Durable galvanized steel frame and aluminum shutters for longevity
- UL listed with corrosion resistance for harsh environments
Cons:- Requires electrical wiring and wall mounting, less DIY friendly
- Lower wattage may limit airflow in very large attics
- More complex installation process compared to plug-and-play units
Best for: Business owners or homeowners with large, high-heat environments needing reliable, adjustable ventilation.
Not ideal for: Small residential attic users seeking a simple, plug-and-play solution without extensive wiring.
- Airflow Capacity:960 CFM
- Power Consumption:65W
- Coverage Area:1400 sq ft
- Speed Control:Variable
- Temperature Range:32-130°F
- Material:Galvanized steel with aluminum shutters
- Control Type:Thermostat and variable speed controller
- Mounting:Wall-mounted
Bottom line: This exhaust fan is best suited for commercial or large-area applications where durability and adjustable control are priorities.
How We Picked
These products were evaluated based on performance, ease of installation, build quality, energy efficiency, and smart features. We prioritized models with adjustable thermostats and humidistats for precise climate control, as well as those offering reliable power sources—wired, solar, or hybrid. Value and user convenience also played a significant role, along with customer reviews and brand reputation. The ranking reflects a balance of high airflow capacity, smart control integration, and durability, ensuring options suit various homeowner priorities and budgets.Factors to Consider When Choosing Best Attic Fans With Thermostat
When selecting an attic fan with a thermostat, it’s important to consider several factors that impact efficiency, usability, and long-term value. The right model should match your attic’s size, your climate, and your preference for energy sources. Additional features like smart controls or automatic shutoff can enhance comfort, but often at a premium. Understanding these tradeoffs can help you avoid common pitfalls, such as overspending on unnecessary features or choosing a fan too small for your space.Airflow Capacity and Attic Size
Matching the fan’s airflow capacity (measured in CFM) to your attic’s size is essential. An undersized fan won’t ventilate effectively, leading to higher temperatures and humidity, while an oversized fan may waste energy and cause excessive cooling. As a rule of thumb, larger attics require higher CFM ratings, but check manufacturer recommendations for your specific square footage. Proper sizing ensures efficient airflow without unnecessary energy consumption.
Type of Power Source
Wired fans offer consistent power and generally higher airflow, making them suitable for larger or more frequently used attics. Solar fans, like the QuietCool AFG SLR-40, excel in energy savings and are ideal for homes with good sun exposure, but may struggle in shaded or low-light conditions. Hybrid models, combining both power sources, can offer a balanced approach, providing flexibility and reliable operation in various weather conditions.
Smart Features and Thermostat Control
Fans with smart controls and thermostats allow for automatic operation based on temperature or humidity. This reduces manual adjustment and improves energy efficiency by turning the fan on only when needed. However, these features often come at a higher cost and may require app setup or Wi-Fi connectivity. Consider whether these smart options match your comfort preferences and tech familiarity before investing.
Build Quality and Durability
Attic fans are exposed to temperature fluctuations and possibly harsh weather if mounted externally. Look for models with galvanized steel or corrosion-resistant components to ensure longevity. Cheaper plastic parts may fail prematurely, leading to costly repairs or replacements. Investing in a well-built fan can save time and money over its lifespan.
Installation and Maintenance
Ease of installation varies; some models are plug-and-play, while others require professional setup. Consider your DIY skills and whether you need additional accessories or mounting hardware. Regular maintenance, like cleaning screens and checking electrical connections, is necessary to keep the fan operating efficiently. Choosing a model with accessible parts can simplify ongoing upkeep.
Frequently Asked Questions
How do I know what size attic fan I need?
To determine the right size, measure your attic’s square footage and select a fan with a CFM rating that matches or exceeds the recommended airflow for that space. A common guideline is 1 CFM per square foot of attic space, but factors like climate, insulation, and existing ventilation can influence this. Proper sizing ensures your attic ventilates effectively without wasting energy, which is especially important when using thermostatically controlled fans.
Are solar attic fans as effective as wired fans?
Solar attic fans can be very effective in sunny conditions and offer energy savings, but their performance depends heavily on sunlight exposure. Wired fans often provide higher airflow and more consistent operation, especially in shaded or cloudy areas. Your choice should balance energy efficiency with the need for reliable, continuous ventilation, particularly in larger or more frequently used attics.
What are the advantages of fans with smart thermostats?
Fans with smart thermostats automatically activate when certain temperature or humidity thresholds are met, reducing manual adjustments and improving efficiency. They can help maintain a more consistent attic climate, prevent overheating, and save energy by turning off when not needed. However, they may require Wi-Fi setup and come at a higher price, so consider whether automation aligns with your comfort and budget.
How often should I maintain my attic fan?
Regular maintenance, such as cleaning dust and debris from screens and blades, is recommended every 6 to 12 months. Checking electrical connections and ensuring the thermostat is calibrated can prevent operational issues. Well-maintained fans operate more efficiently and last longer, reducing the risk of breakdowns during peak seasons. Follow the manufacturer’s guidance for specific maintenance intervals and procedures.
Is it worth paying extra for a smart or solar attic fan?
Investing in a smart fan can be worthwhile if you value automation, remote control, and energy savings, especially in hot climates. Solar fans can significantly reduce energy costs and are excellent for eco-conscious homes, but may lack the power needed for larger attics or cloudy days. Consider your attic size, climate, and budget to decide whether the added features justify the extra expense.
