3 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This Goodman system is ideal for contractors and homeowners seeking a cost-effective upgrade for mid-sized homes or small commercial spaces. The 96% AFUE furnace and 16 SEER cooling deliver strong efficiency without premium pricing.

Review

The Goodman CHPF3743D6 is a horizontal-mount gas furnace and air conditioning combo targeting the sweet spot between budget and efficiency. At $3,225, it undercuts premium brands while delivering respectable heating and cooling output. Goodman's solid reputation in commercial and contractor circles makes this a practical choice for replacement projects. The horizontal configuration appeals to installers working in tight attic spaces or basement installations where vertical units create headaches.

Performance data shows a 96% AFUE heating efficiency rating, meaning minimal fuel waste during winter months. The cooling side delivers 36,000 BTU output at a 16 SEER rating, exceeding Energy Star thresholds. Two-stage operation on both the burner and condenser allows the system to run at partial capacity during mild days, improving comfort and reducing short-cycling. The variable-speed ECM blower motor adapts airflow between 0 and 2,000 CFM, cutting standby power consumption compared to fixed-speed designs.

Pros & Cons

Pros

96% AFUE efficiency reduces heating costs significantly compared to 80-90% systems
16 SEER rating exceeds Energy Star standards for solid cooling efficiency
Two-stage burner and condenser optimize performance across varying load conditions
Variable-speed ECM blower motor minimizes runtime energy waste
Horizontal configuration fits tight attic spaces or basement installations
10-year warranty with online registration provides solid protection
PVC exhaust compatibility simplifies venting in modern homes

Cons

70.4 dB noise level runs slightly louder than premium models during peak operation
Specs show SEER1 as 16 but product title claims 15 SEER, creating minor confusion
No variable-stage heating mentioned, only two-stage, limiting fine-tuned output

Who Should Buy

Best For

Contractors working on replacement projects for 3-4 ton systems in existing homes, and homeowners in moderate climates seeking efficient heating and cooling without premium equipment costs. This works well in mixed-use buildings or rental properties where upfront cost matters.

Consider Alternatives If

Buyers in extreme climates requiring maximum heating capacity should evaluate the 3.5-ton tonnage carefully, and those prioritizing ultra-quiet operation should audition this model first.

3 Ton 15 SEER 96% AFUE 120,000 BTU Goodman Gas Fur

$3225

Buy at HVACDirect →

Installation

This horizontal unit requires 208/230V single-phase power and fits 21.8 to 35 amp breaker sizes depending on your electrical setup. Dimensions of 24.5 inches tall by 21.125 inches wide by 26 inches deep make it compact for confined spaces. PVC exhaust venting is mandatory, which simplifies installation in newer homes. Most HVAC technicians can install this in 4 to 6 hours, though ductwork modifications may add time.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty upon online registration. No evidence of compressor-specific extended protection appears in the specs. The A-coil design includes separate evaporator coil coverage. Registration is required within 60 days of installation, so note this before startup to activate full protection.

Specifications

SKU	CHPF3743D6
Brand/Manufacturer	Goodman
Cooling BTU	36,000
Heating BTU	120,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	70.4
Weight (in lbs)	63.000000
Feature	Spec
AHRI Certificate Number	7368845
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	2000
Configuration	Horizontal
Energy Star	Yes
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	24.5"
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.
SEER1 (Efficiency)	16
Condenser Stages	Two Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	35 amps
Min. Breaker Size	21.8 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

Does this 3-ton system handle homes larger than 3,500 square feet? +

The 120,000 BTU heating and 36,000 BTU cooling output suits 2,500 to 3,500 square-foot homes in moderate climates. Larger homes or cold-climate regions should consider the system's 3.5-ton tonnage rating, but manual load calculation is essential. Undersizing causes comfort issues during peak demand.

Can I use this furnace with my existing ductwork from an older system? +

Likely yes, but verify duct sizing. The maximum 2,000 CFM airflow requires ducts sized for that volume. Undersized ducts reduce efficiency and comfort. Have a technician measure existing ductwork friction rates before committing. Modifications often cost $200 to $800.

What's the real-world heating cost difference between 96% AFUE and 90% AFUE? +

A 96% system saves roughly 6% on annual heating fuel compared to 90% AFUE. In cold climates with $1,200 annual heating costs, expect $70 to $90 in yearly savings. Higher-cost regions see greater dollar savings, offsetting equipment premiums over 5 to 7 years.

How does Goodman's two-stage cooling compare to single-stage competitors? +

Two-stage cooling runs at lower capacity during mild weather, extending runtime and improving dehumidification without temperature swings. Single-stage units cycle on and off more frequently. Goodman's approach reduces energy use by 10 to 15% in transitional seasons like spring and fall.

Does online registration really matter for the 10-year warranty? +

Yes. Without registration, warranty drops to 1 year parts, 5 years compressor. Registration must occur within 60 days of installation. Keep proof of purchase and installation date handy. Goodman's registration process takes 10 minutes online.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.