A gas furnace air conditioner combo should match a home’s heating load, cooling load, ductwork, and installation layout rather than simply offering the largest capacity. I rank the Goodman 2 Ton 14 SEER2 Complete Split System as the best overall pick because its complete configuration and moderate capacity suit a broad range of smaller homes. The Oxbox 2 Ton 13.4 SEER2 System is my value choice, while the 5 Ton System with a Two-Stage 120K BTU Furnace stands out for large homes that need more refined heating control. Buyers must weigh equipment size, SEER2 efficiency, furnace staging, component compatibility, and installation cost. Continue reading for the full breakdown of which systems fit different homes and budgets.
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Key Takeaways
- The 2-ton complete systems offer the broadest appeal, with the Goodman 14 SEER2 package taking the lead over the less efficient Oxbox alternative.
- Cooling efficiency varies from 13.4 to 15.2 SEER2, but the highest rating is not automatically the best value in a short or mild cooling season.
- The 5-ton, 120K BTU two-stage system is the premium comfort pick because its furnace can respond more gently than the single-stage models listed.
- Capacity spans 1.5 to 5 tons, making a load calculation more useful than choosing according to price, brand, or square footage alone.
- Two entries are category outliers: the Albott is a ductless electric heat pump, while the Goodman GR9S801005CN is a furnace without an air conditioner.
| gas furnace air conditioner combo | Cooling Capacity | Cooling Efficiency | Furnace Efficiency |
|---|---|---|---|
| Goodman 2 Ton 14 SEER2 Complet | 2 Ton | 14 SEER2 | 80% AFUE |
| Goodman 1.5 Ton 15.2 SEER2 R-3 | 1.5 Ton | 15.2 SEER2 | 80% AFUE |
| 2.5 Ton 14.5 SEER2 AC & 80% 60 | 2.5 Ton | 14.5 SEER2 | — |
| 2 Ton 13.4 SEER2 AC System wit | 2 Ton | 13.4 SEER2 | — |
| 3 Ton AC System 80,000 BTU Gas | 3 Ton | 13.4 SEER2 | 80% AFUE |
| Albott 12,000 BTU Mini Split A | 12,000 BTU | — | — |
| Goodman 2.5 Ton 13.4 SEER2 Com | 30,000 BTU | 13.4 SEER2 | Up to 96% AFUE |
| 5 Ton HVAC System with 120K BT | 5 tons | 13.4 SEER2 | 96% AFUE |
| Goodman 4 Ton 14.5 SEER2 Compl | 4 tons | 14.5 SEER2 | 80% AFUE |
| ACiQ 2 Ton 40000 BTU Gas Packa | 2 tons | 13.4 SEER2 | — |
| Goodman 3 Ton 15.2 SEER2 Air C | 3 ton | 15.2 SEER2 | — |
| Oxbox by Trane 4 Ton HVAC Syst | — | 14.3 SEER2 | — |
| 4 Ton 14.5 SEER2 AC & 80% 80K | 4 ton | 14.5 SEER2 | 80% AFUE |
| Goodman 100,000 BTU 80% Effici | — | — | — |
More Details on Our Top Picks
Goodman 2 Ton 14 SEER2 Complete Split System with Upflow Coil and 80% AFUE Furnace
I rank the Goodman 2 Ton Complete Split System first because it offers the strongest balance of cooling efficiency, heating capacity, component matching, and warranty coverage in this group. Its 14 SEER2 air conditioner slightly outperforms the 13.4 SEER2 Oxbox by Trane 2 Ton system, while the 80,000 BTU furnace supplies twice the nominal heating input. That makes this Goodman better suited to a two-ton cooling load in a colder area, although proper load calculations matter because an oversized furnace can cycle too frequently. The multi-speed ECM blower and aluminum upflow coil support steadier airflow and heat transfer. I would still weigh the 80% AFUE rating carefully: it is dependable mainstream equipment, but buyers facing long heating seasons may prefer a verified high-efficiency furnace. Professional installation remains mandatory.
Pros:- 14 SEER2 cooling exceeds the efficiency of the comparable 13.4 SEER2 Oxbox system
- 80,000 BTU furnace provides ample heating capacity for colder regions
- Multi-speed ECM blower supports more consistent airflow
- Matched upflow coil and 10-year parts warranty simplify full-system replacement planning
Cons:- 80% AFUE leaves more heat in the exhaust than a high-efficiency condensing furnace
- Large furnace capacity requires careful sizing to avoid short cycling
- Professional installation and commissioning add substantial project cost
Best for: Homeowners with an upflow duct configuration who need two-ton cooling paired with substantial heating capacity for a cooler climate
Not ideal for: Homes with mild winters or low heating loads, where an 80,000 BTU furnace may be oversized and less efficient than a smaller unit
- Cooling Capacity:2 Ton
- Cooling Efficiency:14 SEER2
- Furnace Input:80,000 BTU
- Furnace Efficiency:80% AFUE
- System Type:Split System
- Coil Configuration:Upflow
- Parts Warranty:10 years
Our verdict“This is my leading choice for buyers who need balanced two-ton cooling, strong gas heat, and a clearly stated parts warranty.”
Goodman 1.5 Ton 15.2 SEER2 R-32 Air Conditioner & Gas Furnace System
The Goodman 1.5 Ton R-32 System earns my small-home slot because its capacity and efficiency are better aligned with compact houses than the larger two- and three-ton packages here. Its 15.2 SEER2 rating is higher than the Goodman 2 Ton 14 SEER2 system, which can reduce cooling electricity use when both units are correctly sized. Unlike the ductless Albott mini split, this is a central system intended to serve existing ductwork, and its 60,000 BTU gas furnace offers stronger whole-home winter heating. The tradeoff is a single-stage, 80% AFUE furnace, so heating output and fuel use are less refined than with modulating or condensing equipment. I also rank it below the overall pick because labor, thermostat, and installation accessories are excluded, and the furnace is unavailable in Colorado.
Pros:- 15.2 SEER2 is the highest stated cooling-efficiency rating among these five products
- R-32 refrigerant offers a current-generation system platform
- Matched condenser, evaporator coil, and furnace reduce component-selection guesswork
- Multi-speed ECM blower provides more airflow flexibility than a basic fixed-speed motor
Cons:- Single-stage 80% AFUE furnace offers limited heating modulation and moderate fuel efficiency
- Labor, thermostat, and installation accessories are not included
- Furnace is not available for installation in Colorado
Best for: Owners of smaller ducted homes that need roughly 1.5 tons of cooling and want higher cooling efficiency with R-32 refrigerant
Not ideal for: Colorado buyers, DIY installers, or larger homes that need more than 1.5 tons of cooling capacity
- Cooling Capacity:1.5 Ton
- Cooling Efficiency:15.2 SEER2
- Refrigerant:R-32
- Furnace Input:60,000 BTU
- Furnace Efficiency:80% AFUE
- Furnace Operation:Single-stage gas
- Blower:Multi-speed ECM
Our verdict“I recommend this system for a properly sized small ducted home where cooling efficiency matters more than premium furnace performance.”
2.5 Ton 14.5 SEER2 AC & 80% 60K BTU Natural Gas Furnace Split System
I chose the 2.5 Ton 14.5 SEER2 Split System for buyers who place unusually heavy weight on warranty length. Its 12-year compressor coverage surpasses the stated 10-year parts warranty on the Goodman 2 Ton system, while the 14.5 SEER2 cooling rating also beats the Goodman 2.5 Ton 13.4 SEER2 package listed elsewhere in the roundup. The 60,000 BTU furnace is a more measured pairing than an 80,000 BTU unit for many moderate heating loads. Yet this product has the lineup’s largest documentation concern: the description claims 96% AFUE, but the title and technical data identify an 80% furnace. I would require written model-number confirmation before purchase because that difference affects venting, installation, and fuel costs. Low-NOx restrictions also rule it out in California and Colorado.
Pros:- 14.5 SEER2 provides better stated cooling efficiency than the comparable 13.4 SEER2 Goodman package
- Matched condenser, cased coil, and natural-gas furnace form a complete split system
- 12-year compressor and lifetime heat-exchanger warranty terms provide strong long-range coverage
- 60,000 BTU furnace may suit moderate heating loads better than larger 80,000 BTU pairings
Cons:- Listing conflicts on furnace efficiency, citing both 96% AFUE and 80%
- Does not meet the stated California and Colorado Low-NOx requirements
- Professional installation and continuing maintenance raise ownership cost
Best for: Buyers needing 2.5-ton cooling who value long component warranties and can verify the exact furnace model before ordering
Not ideal for: California or Colorado installations, or anyone unwilling to resolve the conflicting 80% and 96% furnace-efficiency claims
- Cooling Capacity:2.5 Ton
- Cooling Efficiency:14.5 SEER2
- Furnace Input:60,000 BTU
- Listed AFUE:Conflicting data: 96% in description and 80% in title/specifications
- Included Components:Outdoor condenser, cased evaporator coil, and natural-gas furnace
- Compressor Warranty:12 years
- AC and Coil Parts Warranty:7 years
- Furnace Parts Warranty:10 years
- Heat Exchanger Warranty:Lifetime
Our verdict“This is my warranty-focused pick only for buyers who obtain written confirmation of the furnace efficiency and local code compatibility.”
2 Ton 13.4 SEER2 AC System with 40,000 BTU Gas Furnace – Oxbox by Trane
The Oxbox by Trane 2 Ton System is my pick for a smaller ducted home with modest winter demand. Its 40,000 BTU furnace is half the input of the Goodman 2 Ton 80,000 BTU package, which can make the Oxbox a better fit where oversized heating equipment would cause short cycles and uneven rooms. The variable-speed furnace design is its main comfort advantage, allowing more controlled airflow and quieter operation than a basic single-speed setup. Cooling efficiency is less compelling: at 13.4 SEER2, it trails both the 14 SEER2 Goodman and the 15.2 SEER2 Goodman 1.5 Ton system. I would also expect professional sizing and installation, and the sparse warranty information deserves clarification before purchase. This is a capacity-specific choice, not the right answer for cold climates or high cooling loads.
Pros:- 40,000 BTU furnace is less likely to be oversized for a small or well-insulated home
- Variable-speed operation supports steadier airflow and quieter comfort
- Matched condenser, coil, and furnace cover a complete central-system replacement
- Oxbox equipment is backed by the Trane brand family
Cons:- 13.4 SEER2 trails every other reviewed split-system cooling rating in this batch
- 40,000 BTU heating capacity may be inadequate in colder regions
- Warranty terms are not specified in the supplied product data
Best for: Owners of smaller ducted homes in mild-winter regions who need two-ton cooling and only 40,000 BTU of gas heat
Not ideal for: Cold-climate homes or buyers prioritizing the lowest cooling electricity use, since capacity and 13.4 SEER2 efficiency are modest
- Cooling Capacity:2 Ton
- Cooling Efficiency:13.4 SEER2
- Furnace Input:40,000 BTU
- Furnace Type:Variable-speed
- System Configuration:Central split system
- Included Components:Air conditioner, matched evaporator coil, and gas furnace
- Brand:Oxbox by Trane
Our verdict“I favor this Oxbox for mild-climate homes that value controlled airflow more than maximum cooling efficiency or high heating output.”
3 Ton AC System 80,000 BTU Gas Furnace 13.4 SEER2 Oxbox by Trane
I give the Oxbox by Trane 3 Ton System the larger-home role because its 36,000 BTU-per-hour nominal cooling capacity sits above the two-ton packages without reaching the oversized territory of the four- and five-ton systems elsewhere in the roundup. Its 80,000 BTU, 80% AFUE furnace also supplies more winter output than the 40,000 BTU Oxbox model, making this pairing more suitable for a bigger heating load. The compromise is cooling economy: 13.4 SEER2 performance falls behind the Goodman 1.5 Ton system’s 15.2 SEER2 and the generic 2.5 Ton system’s 14.5 SEER2. R-454B refrigerant places it on a newer platform, but installation crews need compatible tools and training. I would request written warranty terms as well, since none are provided in the supplied data. Proper load calculations remain decisive.
Pros:- Three-ton cooling capacity serves larger loads than the 1.5-ton and two-ton systems
- 80,000 BTU furnace provides substantial heating output
- Matched air conditioner, furnace, and evaporator coil support full-system replacement
- R-454B refrigerant places the equipment on a newer refrigerant platform
Cons:- 13.4 SEER2 is less efficient than several smaller systems in the lineup
- 80% AFUE furnace consumes more fuel than a condensing high-efficiency model
- No warranty duration is supplied, and R-454B service requires compatible installer equipment
Best for: Owners replacing a three-ton ducted system in a medium-to-large home that also needs 80,000 BTU of gas heating input
Not ideal for: Efficiency-focused buyers, small homes, or projects without access to an installer equipped for R-454B refrigerant
- Cooling Capacity:3 Ton
- Cooling Efficiency:13.4 SEER2
- Furnace Input:80,000 BTU
- Furnace Efficiency:80% AFUE
- Refrigerant:R-454B
- System Configuration:Central split system
- Included Components:Air conditioner, matching evaporator coil, and gas furnace
- Brand:Oxbox by Trane
Our verdict“This is my capacity-first choice for a correctly sized three-ton home, provided the buyer confirms warranty coverage and R-454B installer readiness.”
Albott 12,000 BTU Mini Split Air Conditioner & Heating System with Fast-Fit Set
I place the Albott 12,000 BTU Mini Split here as the lineup’s ductless alternative, not as a literal gas-furnace combination. Its inverter heat pump provides efficient heating and cooling for a bedroom, apartment, or living area without existing ducts. At under 29 dB, it is far quieter indoors than the 74 dB Goodman 2.5 Ton system’s listed operating figure, while the pre-wired Fast-Fit design reduces installation work. The tradeoff is scope: 12,000 BTU and 750-square-foot coverage cannot replace a central system for a full-size house, and cold-climate buyers may prefer the stronger gas heat of the Goodman 60,000 BTU furnace. I rank it below true furnace-and-AC packages because it lacks gas heat, but it remains the most approachable choice for single-zone comfort.
Pros:- Inverter heating and cooling supports efficient single-zone operation
- Indoor noise below 29 dB suits bedrooms and quiet living areas
- Pre-wired Fast-Fit configuration reduces installation complexity
- Five-year compressor and eight-year parts coverage
Cons:- It is a heat-pump mini split, not a gas furnace and air-conditioner combination
- The power cord must be purchased separately
- Capacity is limited to spaces up to 750 square feet
Best for: Apartment owners, room-addition projects, and buyers heating or cooling one ductless space up to 750 square feet
Not ideal for: Buyers who specifically need a whole-home gas furnace or dependable high-output heat during severe cold
- System Type:Ductless inverter heat pump
- Cooling Capacity:12,000 BTU
- Voltage:115V
- Efficiency:18 SEER2
- Coverage Area:Up to 750 sq. ft.
- Operating Temperature Range:5°F–122°F
- Noise Level:Under 29 dB
- Warranty:5-year compressor; 8-year parts
Our verdict“I recommend this for buyers who value quiet, ductless room conditioning more than whole-home gas heating.”
Goodman 2.5 Ton 13.4 SEER2 Complete Split System with 60k BTU Furnace and Install Accessories
The Goodman 2.5 Ton Complete Split System earns my Best Overall position because its capacities fit more homes than the oversized 5 Ton system, while its 96% AFUE furnace wastes much less fuel than the Goodman 4 Ton model’s 80% AFUE unit. The included coil and installation accessories also make this a cohesive replacement package rather than a collection of mismatched parts. Its 13.4 SEER2 cooling rating is adequate rather than class-leading; the Goodman 4 Ton reaches 14.5 SEER2, and the listed 74 dB sound level may be noticeable outdoors. I also factor in the need for professional installation, both for safe gas and refrigerant work and for warranty eligibility. For a correctly sized midrange home, though, the combination of 30,000 BTU cooling, efficient gas heat, and 10-year parts coverage gives it the strongest balance in this group.
Pros:- 96% AFUE furnace reduces fuel waste compared with 80% AFUE alternatives
- Balanced 2.5-ton cooling capacity suits many mid-sized homes
- Package includes an upflow coil and installation accessories
- Ten-year limited parts warranty is available with proper installation
Cons:- 13.4 SEER2 cooling efficiency trails higher-rated systems in the lineup
- Listed 74 dB noise output may be conspicuous near patios or windows
- Professional installation is required for warranty eligibility
Best for: Owners of mid-sized homes who need a complete central replacement and prioritize efficient gas heating
Not ideal for: Noise-sensitive households or buyers seeking premium cooling efficiency above 13.4 SEER2
- Cooling Capacity:30,000 BTU
- Nominal Capacity:2.5 tons
- Cooling Efficiency:13.4 SEER2
- Furnace Output:60,000 BTU
- Furnace Efficiency:Up to 96% AFUE
- Refrigerant:R-32
- Voltage:208V
- Noise Level:74 dB
- Warranty:10-year limited manufacturer warranty
Our verdict“I favor this as the most balanced central package for a mid-sized home needing efficient gas heat without five-ton capacity.”
5 Ton HVAC System with 120K BTU Two-Stage Gas Furnace and 13.4 SEER2 Air Conditioner
I reserve the 5 Ton HVAC System with 120K BTU Furnace for homes that genuinely require high capacity. Its stated 2,500–3,000-square-foot range and two-stage, variable-speed furnace make it better equipped for large layouts than the Goodman 2.5 Ton system, especially when heating demand changes across the day. Two-stage operation can moderate output instead of running at full fire every cycle, supporting steadier temperatures and lower sound. Yet bigger is not automatically better: an oversized five-ton air conditioner may short-cycle, control humidity poorly, and wear faster in a smaller home. Cooling efficiency also stops at 13.4 SEER2, below the Goodman 4 Ton model’s 14.5 SEER2. I rank this as a capacity specialist rather than the universal winner; its 96% AFUE rating is appealing, but professional load calculations are especially valuable before buying equipment this large.
Pros:- Five-ton cooling capacity is designed for large residential floor plans
- Two-stage furnace can deliver steadier heat than a single-stage model
- Variable-speed airflow supports more consistent room temperatures
- 96% AFUE rating limits gas wasted through exhaust
Cons:- Oversized capacity can perform poorly in homes below its intended range
- 13.4 SEER2 trails the 14.5 SEER2 four-ton Goodman system
- Large, complex equipment requires professional sizing and installation
Best for: Owners of 2,500–3,000-square-foot homes whose professional load calculation supports five-ton cooling and 120,000 BTU heating
Not ideal for: Small and mid-sized homes where its high output could cause short cycling, uneven humidity control, and unnecessary expense
- Cooling Capacity:5 tons
- Furnace Capacity:120,000 BTU
- Cooling Efficiency:13.4 SEER2
- Furnace Efficiency:96% AFUE
- Furnace Stages:Two-stage
- Blower Type:Variable-speed
- Refrigerant:R-454B
- Recommended Home Size:2,500–3,000 sq. ft.
Our verdict“I would choose this only for a large home with a verified need for five-ton cooling and high-output gas heat.”
Goodman 4 Ton 14.5 SEER2 Complete Split System with Upflow Coil and 80% AFUE Furnace
The Goodman 4 Ton 14.5 SEER2 Split System takes my cooling-focused slot because it pairs substantial four-ton capacity with the highest cooling-efficiency rating among these four central gas systems. Compared with the 5 Ton 13.4 SEER2 system, it is a more measured choice for a home that needs strong cooling but not five-ton output. The compromise sits on the heating side: its 80% AFUE furnace sends more fuel energy out through the flue than the Goodman 2.5 Ton system’s 96% AFUE furnace. That makes this package more persuasive in warmer climates or homes with moderate winter demand. Buyers also receive an aluminum upflow coil and ten-year warranty, but published details omit sound output and advanced staging features. I would rank it behind the 96% AFUE Goodman for balanced year-round efficiency, yet ahead when cooling capacity and SEER2 carry greater weight.
Pros:- 14.5 SEER2 rating leads the reviewed central systems for cooling efficiency
- Four-ton capacity serves larger homes without stepping up to five tons
- Complete package includes the air conditioner, furnace, and aluminum upflow coil
- Ten-year warranty provides long parts coverage
Cons:- 80% AFUE furnace consumes more gas for the same delivered heat than 96% AFUE models
- Upflow configuration may not fit every existing duct layout
- No published noise rating or advanced staging details are provided
Best for: Owners of larger homes in cooling-heavy climates who need four-ton capacity and can accommodate an upflow furnace
Not ideal for: Cold-climate households with high annual gas use, since the 80% AFUE furnace loses more heat through exhaust
- System Type:Split system
- Cooling Capacity:4 tons
- Cooling Efficiency:14.5 SEER2
- Furnace Capacity:80,000 BTU
- Furnace Efficiency:80% AFUE
- Coil Configuration:Upflow
- Coil Material:Aluminum
- Warranty:10 years
Our verdict“I recommend this for cooling-dominant larger homes where 14.5 SEER2 matters more than high-efficiency gas heating.”
ACiQ 2 Ton 40000 BTU Gas Package Unit Central System, 13.4 SEER2
I give the ACiQ 2 Ton Gas Package Unit a distinct place because it combines heating and cooling in one outdoor cabinet. That layout can suit properties without indoor space for a furnace and coil, unlike the split-format Goodman 2.5 Ton system. Its two-ton cooling and 40,000 BTU gas heat also target smaller buildings rather than the large-home market served by the five-ton package. Galvanized steel construction supports outdoor durability, and a ten-year parts warranty adds useful protection. Still, the 380-pound cabinet demands equipment and professional labor to position, while packaged duct connections may require more site work than buyers expect. The included backlit thermostat is easy to read but non-programmable, limiting schedule-based savings. I rank it as the best configuration-specific choice, not Best Overall, because 13.4 SEER2 efficiency is ordinary and no AFUE rating is supplied.
Pros:- Single outdoor cabinet saves indoor mechanical space
- Two-ton cooling and 40,000 BTU heat suit smaller properties
- Galvanized steel housing is built for permanent outdoor placement
- Ten-year limited parts warranty supports long-term ownership
Cons:- The 380-pound unit requires professional handling and installation
- Included thermostat lacks programmable scheduling
- No furnace AFUE rating is provided for comparing gas consumption
Best for: Owners of smaller homes or light-commercial properties that lack indoor mechanical-room space and can support an outdoor packaged unit
Not ideal for: Buyers wanting a lightweight DIY installation, programmable controls, or a published high-efficiency AFUE rating
- System Type:Packaged central system
- Cooling Capacity:2 tons
- Heat Output:40,000 BTU
- Cooling Efficiency:13.4 SEER2
- Fuel Type:Natural gas
- Heating Method:Forced air
- Electrical Supply:208/230V, single-phase, 60Hz
- Dimensions:51 in. D x 47 in. W x 34.5 in. H
- Weight:380 lb.
Our verdict“I favor this when indoor space rules out a split system and a compact-capacity outdoor package fits the property.”
Goodman 3 Ton 15.2 SEER2 Air Conditioning System with 9-Speed Motor and Free Thermostat
I rank the Goodman 3 Ton 15.2 SEER2 System as the best cooling-side upgrade for a home with a serviceable gas furnace. Its 15.2 SEER2 efficiency beats the 14.3 SEER2 Oxbox 4 Ton HVAC System, while the nine-speed motor offers finer airflow adjustment than a basic fixed-speed setup. The included thermostat also removes one small purchase from the installation list. The catch is that this is not a complete furnace-and-AC combination: buyers must confirm coil, furnace, ductwork, electrical, and thermostat compatibility with an HVAC contractor. Its three-ton output also serves less floor area than the four-ton Oxbox system. I would choose it for targeted AC replacement, but skip it when both heating and cooling equipment are aging or when documented noise and warranty terms are buying priorities.
Pros:- 15.2 SEER2 rating is higher than several complete systems in the lineup
- Nine-speed motor supports more refined airflow control
- Thermostat is included
- Three-ton capacity suits many medium-to-large homes
Cons:- Does not include a gas furnace, so it is not a complete combo
- Compatibility with an existing furnace and coil requires professional verification
- Noise and warranty details are not supplied
Best for: Homeowners replacing only the cooling side of a matched central system while retaining a compatible gas furnace
Not ideal for: Buyers needing a complete heating-and-cooling package or documented compatibility, noise, and warranty details
- Cooling Capacity:3 ton
- Cooling Efficiency:15.2 SEER2
- Refrigerant:R-410A
- Installation Type:Split system
- Motor:9-speed
- Power Wattage:3,500 watts
- Control Method:Remote and touch
- Power Levels:10
- Outdoor Unit Required:Yes
Our verdict“This is my cooling-upgrade pick for buyers keeping a compatible furnace, not for anyone replacing the entire HVAC system.”
Oxbox by Trane 4 Ton HVAC System with 120K BTU Gas Furnace and 14.3 SEER2
The Oxbox by Trane 4 Ton HVAC System earns my large-home role because it combines the air conditioner, matching evaporator coil, and a powerful 120,000 BTU furnace in one coordinated package. Compared with the 4 Ton 14.5 SEER2 and 80K BTU system, this model gives cold-climate buyers 50% more listed heating capacity, though its 14.3 SEER2 cooling rating is slightly lower. Its stated 2,200-to-3,000-square-foot range makes the intended scale clearer than listings that provide tonnage alone. That capacity can become a liability in a tighter, milder-climate, or well-insulated house: an oversized furnace may cycle frequently unless a load calculation supports it. I also place it below more efficient or two-stage alternatives for comfort control. The complete matched configuration is convenient, but professional installation and the full-system purchase create a substantial upfront bill.
Pros:- Includes the air conditioner, gas furnace, and matching evaporator coil
- Four-ton cooling capacity is suited to larger homes when load calculations agree
- 120,000 BTU furnace offers more heating output than the 80K BTU four-ton alternative
- 14.3 SEER2 rating meets the stated 2025 efficiency standard
Cons:- Large furnace may short-cycle if selected without a proper load calculation
- Cooling efficiency trails the 14.5 SEER2 four-ton alternative
- Complete-system cost and professional installation can be substantial
Best for: Owners of 2,200-to-3,000-square-foot homes with ductwork and a verified heating load near 120,000 BTU
Not ideal for: Well-insulated or mild-climate homes where a 120,000 BTU furnace could be oversized
- Air Conditioner Capacity:4 ton
- Gas Furnace Output:120,000 BTU
- Cooling Efficiency:14.3 SEER2
- Suggested Home Size:2,200–3,000 sq ft
- System Type:Complete central HVAC system
- Included Components:Air conditioner, gas furnace, and matching evaporator coil
- Heating Fuel:Gas
- Efficiency Standard:Meets stated 2025 standard
Our verdict“I would choose this matched system for a large home that genuinely needs both four-ton cooling and 120,000 BTU of gas heat.”
4 Ton 14.5 SEER2 AC & 80% 80K BTU Natural Gas Furnace Split System
I see the 4 Ton 14.5 SEER2 and 80K BTU Split System as the more balanced four-ton pairing in this group. It supplies the same cooling tonnage as the Oxbox 120K BTU package but pairs it with 80,000 BTU of natural-gas heat, which may fit a moderately insulated home better than the Oxbox unit’s much larger furnace. Its 14.5 SEER2 rating also holds a small cooling-efficiency advantage. Buyers still need a Manual J load calculation; matching four-ton cooling with 80K BTU heating by intuition can produce poor humidity control or frequent cycling. The 80% AFUE furnace vents a meaningful share of fuel energy rather than converting it to indoor heat, so colder-region buyers may prefer a higher-AFUE system. I would also rule it out where California or Colorado Low-NOx compliance applies. Its component warranties add reassurance, but the supplied data does not state their exact duration.
Pros:- Four-ton cooling is paired with a less aggressive furnace size than the 120K BTU Oxbox
- 14.5 SEER2 rating slightly exceeds the comparable Oxbox system
- Package includes the AC, evaporator coil, and gas furnace
- Major components are covered by stated warranties
Cons:- 80% AFUE heating loses more energy through exhaust than a high-efficiency furnace
- Does not comply with stated California and Colorado Low-NOx requirements
- Exact warranty durations are not provided
Best for: Buyers needing four-ton central cooling with moderate 80,000 BTU natural-gas heating outside restricted Low-NOx markets
Not ideal for: California or Colorado installations subject to Low-NOx rules, or cold-climate buyers seeking a higher-AFUE furnace
- Cooling Capacity:4 ton
- Cooling Efficiency:14.5 SEER2
- Heating Capacity:80,000 BTU
- Furnace Efficiency:80% AFUE
- Heating Fuel:Natural gas
- System Type:Split system
- Included Components:Air conditioner, evaporator coil, and gas furnace
- Low-NOx Compliance:Not compliant for stated California and Colorado requirements
Our verdict“This is my balanced four-ton choice for buyers whose load calculation supports 80K BTU heating and whose location permits the furnace.”
Goodman 100,000 BTU 80% Efficiency Multi-Speed Single-Stage Upflow/Horizontal Furnace Model GR9S801005CN
The Goodman GR9S801005CN fills a narrower role than the full Oxbox and 4 Ton 14.5 SEER2 packages: it is my furnace-only choice for replacing failed heat equipment while retaining a compatible AC system. Its 100,000 BTU input and multi-speed blower sit between the 80K BTU four-ton pairing and the 120K BTU Oxbox, giving contractors another load-matching option. Upflow or horizontal positioning offers useful installation flexibility, and the listed 56-decibel figure gives buyers a noise reference missing from the Goodman 3 Ton AC listing. Yet this is not a gas furnace and air conditioner combo by itself; a coil, condenser, controls, venting parts, and other accessories may add substantial cost. It also cannot serve a downflow layout. At 175 pounds and 80% efficiency, it demands professional handling and consumes more fuel than a high-AFUE condensing furnace for the same delivered heat.
Pros:- 100,000 BTU capacity bridges the lineup’s 80K and 120K furnace options
- Supports both upflow and horizontal installation
- Multi-speed blower offers more airflow flexibility than a fixed-speed design
- Long listed parts and unit-replacement warranty coverage
Cons:- Furnace only; AC equipment and several accessories are separate
- Cannot be installed in a downflow configuration
- 80% efficiency produces higher fuel use than a high-AFUE furnace
Best for: Homeowners with an upflow or horizontal system who need a 100,000 BTU furnace while keeping compatible cooling equipment
Not ideal for: Downflow installations, whole-system replacements, or cold-climate households prioritizing high-AFUE heating
- Model:GR9S801005CN
- Heating Capacity:100,000 BTU
- Efficiency:80%
- Installation Orientation:Upflow or horizontal; not downflow
- Dimensions:28 x 21 x 34 inches
- Weight:175 pounds
- Voltage:115 volts
- Listed Noise Level:56 decibels
- Listed Warranty:10-year parts limited and 10-year unit replacement with qualifying installation and registration
Our verdict“I recommend this only as a matched furnace-side replacement for an upflow or horizontal system, not as a ready-to-install HVAC combo.”
How We Picked
I ranked these systems by capacity fit, configuration completeness, efficiency, and comfort control. Complete matched systems received preference over listings that describe only part of the required equipment or leave component details unclear. I also compared SEER2 ratings, furnace output, AFUE, blower design, and staging because each affects operating behavior in a different way. A higher-capacity unit did not rank above a smaller one merely because it produces more heating or cooling. My top positions favor balanced systems with broad residential usefulness rather than equipment aimed at unusually large or narrowly defined spaces.
Installation demands and long-term ownership shaped the order as well. I gave added weight to included coils, accessories, thermostats, or packaged construction when they could simplify project planning, but I did not treat those extras as substitutes for compatibility checks. Systems with two-stage heat or higher SEER2 ratings gained ground when their added cost could produce a clear comfort or energy benefit. The mini-split and furnace-only entries ranked as specialized alternatives because neither is a direct replacement for a conventional gas furnace and central-air pairing. This method makes the hierarchy visible: fit and completeness come first, followed by comfort, efficiency, installation practicality, and price.
Factors to Consider When Choosing Gas Furnace Air Conditioner Combo
The best choice begins with the building rather than the equipment label. I would narrow the field using heating and cooling loads, then compare system layout, efficiency, comfort control, and installed cost. This approach prevents an attractive equipment price from hiding poor sizing or expensive installation changes.
Match Cooling Tons and Furnace Output Separately
Cooling tonnage and furnace BTU output solve different problems, so they should not be scaled together automatically. A home may need strong heating but modest cooling, particularly in a cold climate, while a hot-climate property may have the opposite load profile. I recommend asking an HVAC contractor for a room-by-room Manual J load calculation instead of relying on a square-footage shortcut. Oversized air conditioners tend to run short cycles, which can leave indoor humidity higher and create uneven temperatures. An oversized furnace may produce fast temperature swings and extra noise at the registers. The broad 1.5-to-5-ton range in this lineup is useful only when the selected capacity matches the house.
Choose the Right Equipment Layout
A split system places the condenser outside and the furnace with its evaporator coil indoors, making it the usual choice for homes with existing ducts and mechanical space. A packaged gas-electric unit, such as the ACiQ option, puts heating and cooling equipment in one outdoor cabinet and can simplify projects designed for that layout. It is not automatically an easy swap because duct connections, drainage, clearances, and the equipment base may need changes. The Albott mini-split serves a different purpose: it provides ductless electric heating and cooling for a room or zone rather than gas heat for an entire ducted home. I would choose it for an addition, workshop, or problem room, not as a direct equivalent to the central systems. Identifying the required split, packaged, or ductless format early removes many incompatible products from the shortlist.
Balance SEER2, AFUE, and Furnace Staging
SEER2 describes seasonal cooling efficiency, while AFUE estimates how much furnace fuel becomes usable heat. Moving from 13.4 to 15.2 SEER2 can reduce cooling energy use, but the financial return depends on climate, utility rates, system runtime, and purchase price. Most furnaces named in this roundup are 80% AFUE models, which typically require conventional venting and lose more heat through exhaust than higher-efficiency condensing furnaces. Furnace staging affects comfort in another way. A two-stage furnace can run at a lower output during mild weather, often producing steadier temperatures and quieter airflow than a single-stage unit. I would pay extra for staging or higher efficiency only when the local climate and expected ownership period support the added cost.
Verify Matched Components Before Ordering
A condenser, evaporator coil, furnace blower, and metering device must work as a matched system. Similar brand names or tonnage labels do not prove certified performance or physical compatibility. I recommend requesting the complete model-number combination and its AHRI certificate from the seller or installer before payment. Refrigerant type also matters because the Goodman 1.5-ton listing specifies R-32, which requires compatible components, tools, and service practices. Coil orientation, cabinet width, electrical requirements, line-set dimensions, and available static pressure can all alter installation cost. Confirming these details prevents a low equipment price from becoming an expensive field-modification project.
Compare the Complete Installed Price
The advertised equipment price rarely represents the final project total. Labor may include removing old equipment, altering sheet metal, replacing a line set, adding drainage, upgrading electrical service, modifying gas piping, and handling permits. A system with installation accessories included may offer real value, but only if those parts fit the property and meet the installer’s requirements. I would compare written bids using the same scope, including thermostat, startup, disposal, labor coverage, and post-installation service. Brand familiarity also affects how quickly local contractors can source parts and diagnose faults. The better purchase is often the system with strong local service and a clear labor agreement, even when another listing has a lower upfront price.
Frequently Asked Questions
How do I choose the right AC tonnage and furnace BTU rating?
I would base both figures on a professional Manual J load calculation, not on home size alone. Insulation, window area, air leakage, orientation, ceiling height, climate, and duct losses can change the required capacity. Cooling tonnage should match the calculated heat gain, while furnace output should match the winter heat loss. The furnace’s input rating is not its delivered output; an 80% AFUE 60,000 BTU furnace supplies roughly 48,000 BTU per hour under rated conditions. Correct sizing usually produces longer, steadier cycles than an oversized system.
Is a 15.2 SEER2 system worth paying more for than a 13.4 SEER2 model?
A 15.2 SEER2 system is more appealing in a hot climate or a home where air conditioning runs for long periods. The savings may be modest in a cool region, especially if the higher purchase price is substantial. Installation quality, duct leakage, and correct refrigerant charging can affect actual energy use as much as the difference between nearby ratings. I would compare estimated annual operating costs using local electricity prices and the contractor’s load calculation. Choose the higher rating when its comfort, energy, or incentive benefits justify the installed-price gap.
Should I buy a packaged unit or a split furnace and AC system?
A split system usually makes the most sense when the home already has an indoor furnace, compatible ductwork, and space for a new coil. A packaged unit fits properties designed to connect their ducts to a single outdoor cabinet. Packaged construction can reduce indoor equipment demands, but it exposes more components to outdoor conditions and may require major duct alterations when replacing a split system. I would use the home’s existing layout as the deciding factor rather than treating one format as universally better. The ACiQ packaged system is attractive for the right installation, but it is not a shortcut for every project.
Can I install a gas furnace and air conditioner combo myself?
I would reserve a conventional combo installation for licensed HVAC professionals. The work can involve gas piping, combustion venting, high-voltage wiring, refrigerant handling, condensate drainage, airflow setup, and code inspections. Even a system sold with accessories still needs correct commissioning and safety checks. DIY work may also affect warranty eligibility or make future service harder to obtain. The Albott mini-split is marketed with a DIY-oriented line set, but its electric heat-pump design does not make the gas systems equally suitable for self-installation.
Are the mini-split and furnace-only listings true gas furnace AC combos?
No, those two products fill narrower roles. The Albott 12,000 BTU mini-split uses electricity for ductless heating and cooling, so it does not include a gas furnace. The Goodman GR9S801005CN is an 80% AFUE gas furnace, but it still needs a compatible coil, condenser, controls, and installation materials to provide cooling. I would keep the Albott on the list only for single-zone or supplemental comfort and the Goodman furnace for replacement projects where usable AC components remain. Buyers seeking a complete central combo should focus on listings that identify both matched heating and cooling equipment.
Conclusion
For most appropriately sized smaller homes, my best overall choice is the Goodman 2 Ton 14 SEER2 Complete Split System because it balances completeness, familiar central-system design, and moderate efficiency. The Oxbox 2 Ton 13.4 SEER2 system is the best value for buyers who prioritize a lower-cost conventional configuration over a higher cooling rating. For a large home with a verified load, the 5 Ton System with the 120K BTU Two-Stage Furnace is the premium pick because staging offers a stronger comfort advantage than raw capacity alone. First-time HVAC buyers may find the ACiQ packaged unit easier to scope when their property already uses that layout, though professional sizing and installation remain necessary. For specific needs, I would choose the Goodman 1.5-ton R-32 system for a small home seeking higher cooling efficiency, the Albott for one ductless zone, or the Goodman GR9S801005CN for a furnace-only replacement. The final choice should follow the load calculation and matched-system documentation, not the largest BTU or tonnage figure.
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