3 Ton 17 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system works best for homeowners in moderate climates seeking reliable heating and cooling without premium pricing. The horizontal configuration and two-stage operation make it ideal for basement installations where space is tight and efficiency matters more than cutting-edge specs.

Review

The Goodman CHPF3743C6 represents solid mid-market HVAC engineering. At $2,160 for a matched 3-ton system, it positions itself between budget brands and premium manufacturers. This horizontal configuration addresses a real market need: homeowners and contractors working with space constraints that rule out traditional upflow units. Goodman's reputation centers on reliability over innovation, and this unit reinforces that positioning with proven two-stage components and straightforward engineering.

Performance specs reveal a balanced design. The 80,000 BTU heating output pairs logically with 35,000 BTU cooling capacity, maintaining the 3-ton rating. The 17 SEER2 efficiency reflects modern refrigerant standards, while the 80% AFUE heating efficiency sits at the industry standard rather than premium tier. Variable-speed blower technology at 2000 CFM maximum prevents oversizing issues common in cheaper single-speed models. The two-stage burner and condenser configuration reduces energy waste during partial-load operation, a real benefit during spring and fall months.

Pros & Cons

Pros

Two-stage burner and two-stage condenser provide consistent comfort and reduced short-cycling
80,000 BTU heating capacity covers 3-ton cooling load evenly across seasons
Variable-speed blower motor maximizes efficiency while running at 2000 CFM maximum
17 SEER cooling efficiency qualifies for ENERGY STAR certification
Horizontal configuration fits tight basement or attic spaces where vertical models won't work
10-year warranty with online registration covers both heating and cooling components

Cons

80% AFUE is standard efficiency, not high efficiency like 95%+ models available at $400 more
R410A or R22 refrigerant compatibility limits future upgrade options as industry transitions to newer blends
71 dB noise level during operation is audible from adjacent rooms, especially during heating cycles

Who Should Buy

Best For

Homeowners in climates with moderate heating and cooling demands who need a proven, reliable system at reasonable cost. Contractors installing in retrofit applications where horizontal orientation is required and budget constraints matter.

Consider Alternatives If

Those in harsh cold climates requiring 95%+ AFUE efficiency should skip this for high-efficiency models, and anyone prioritizing whisper-quiet operation should choose units rated below 68 dB.

3 Ton 17 SEER 80% AFUE 80,000 BTU Goodman Gas Furn

$2160

Buy at HVACDirect →

Installation

This horizontal unit requires metal flue exhaust connection and 208/230V single-phase power. Breaker sizing ranges from 21.9 to 35 amps, standard for residential installations. The 63-pound weight and 21 by 26-inch footprint fit easily into typical basement mechanical spaces. Technicians should verify clearance for the 3/8-inch liquid and 7/8-inch suction lines before final placement.

Warranty & Reliability

Goodman backs this system with 10 years of coverage when registered online. Registration takes five minutes through their website. Coverage includes both the furnace and evaporator coil, addressing the two most expensive failure points. This warranty ranks competitively against similarly priced alternatives and provides genuine peace of mind for typical homeowners.

Specifications

SKU	CHPF3743C6
Brand/Manufacturer	Goodman
Cooling BTU	35,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	63.000000
Feature	Spec
AHRI Certificate Number	204633307
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Horizontal
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	21"
Width	21.125"
Depth	26"
Resources	CHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
Energy Star	Yes
SEER1 (Efficiency)	18
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	35 amps
Min. Breaker Size	21.9 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

Why does this system show both 3-ton and 3.5-ton ratings? +

The 3-ton rating reflects cooling capacity at 35,000 BTU. The 3.5-ton tonnage in specs represents the system's theoretical capacity under different measurement conditions. Real-world performance centers on the 3-ton cooling rating. This discrepancy appears in industry specs but doesn't affect actual performance or sizing.

Can I install this horizontally in an attic or does it need a basement? +

Horizontal orientation works in either location. Verify your attic or basement has adequate clearance for the 21 by 26-inch footprint plus service access. Ensure metal flue venting connects properly to your roof or wall vent. Basement installation typically requires less complex venting and is therefore easier for contractors.

How does 17 SEER2 cooling efficiency compare to newer systems? +

17 SEER2 is current-generation efficiency, not outdated. The SEER2 metric replaced the older SEER standard in 2023. This rating makes it ENERGY STAR qualified. Premium models exceed 20 SEER2, but cost 40% more for 18% better efficiency. For most homeowners, 17 SEER2 delivers solid cost-to-efficiency balance.

Is 80% AFUE furnace efficiency acceptable compared to high-efficiency models? +

80% AFUE meets current code and provides proven reliability. High-efficiency condensing furnaces reach 95% AFUE but cost significantly more and require condensate drainage. In moderate climates, the payback period for upgrading to 95% AFUE often exceeds 15 years. 80% AFUE works well for those prioritizing upfront savings over heating cost reduction.

What does the 10-year warranty actually cover if something breaks? +

After online registration, Goodman covers manufacturing defects in both furnace and air conditioning components. Major items like the compressor, heat exchanger, and evaporator coil receive full coverage. Labor costs typically fall on you unless your installer offers additional protection plans.

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