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

// Bottom Line

This Goodman system works best for homeowners replacing older equipment in moderate climates where upflow installation is practical. At $2,789, you're getting solid efficiency ratings, Energy Star certification, and two-stage operation without premium pricing.

Review

The Goodman 3.5 ton split system sits squarely in the middle market, offering balanced performance without luxury pricing. With 35,000 BTU cooling and 80,000 BTU heating capacity, it suits homes around 2,000 to 2,500 square feet. The upflow/downflow configuration gives installers flexibility, while the A-coil design integrates cleanly with most ductwork setups. At $2,789, you're buying established brand reliability with Energy Star backing, not cutting corners on quality.

Performance numbers tell a practical story. The 17 SEER2 rating, two-stage scroll compressor, and variable-speed blower deliver measurable cooling efficiency gains over single-stage units. The furnace's 80% AFUE hits code minimums but lags behind 90%+ options that dominate new construction. Running at 71 dB during peak load means you'll hear it cycle, especially in quieter homes. The system handles R410A or R22 refrigerant, works on standard 120V single-phase power, and needs breaker capacity between 21.9 and 35 amps for safe operation.

Pros & Cons

Pros

17 SEER2 cooling efficiency with two-stage scroll compressor reduces runtime and energy waste
80% AFUE furnace meets minimum efficiency standards across most US jurisdictions
3.5 ton capacity handles 35,000 BTU cooling and 80,000 BTU heating for typical 2,000-2,500 sq ft homes
Variable-speed blower motor with 2,000 CFM max airflow improves comfort and distribution
Energy Star certified with 10-year warranty when registered online, covering parts and labor

Cons

80% AFUE is baseline efficiency, not high-tier, missing 90%+ options that reduce heating costs significantly
71 dB noise level runs louder than premium units, noticeable during full-load cooling cycles
Single product listing lacks details on sound dampening, installation labor costs, and local contractor availability

Who Should Buy

Best For

Homeowners upgrading from 10+ year old systems who want reliable, code-compliant equipment without premium pricing. Contractors installing in rental properties or price-sensitive markets will appreciate the AHRI certification and straightforward two-stage design.

Consider Alternatives If

Anyone prioritizing quiet operation or living in cold climates where 90% AFUE furnaces deliver faster ROI should compare higher-efficiency alternatives.

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

$2789

Buy at HVACDirect →

Installation

Installation requires metal exhaust flue for the furnace and proper evacuation of refrigerant lines. The 3/8 inch liquid line and 7/8 inch suction line are standard sizing, fitting most existing systems. Upflow configuration demands proper return air plenum space above the furnace. Licensed technicians typically complete installations in 4 to 6 hours. The 63-pound weight makes solo handling difficult, so plan for two-person installation crews.

Warranty & Reliability

Goodman backs this system with 10 years coverage when you register online, covering compressor, parts, and labor. This matches industry standards for mid-tier equipment. Registration is straightforward through their website. The evaporator coil carries separate extended protection. Warranty transfers if you sell your home, adding resale value. Proof of professional installation is required, so DIY setup voids coverage.

Specifications

SKU	CAPF3743C6
Brand/Manufacturer	Goodman
Cooling BTU	35,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	63.000000
Feature	Spec
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
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF 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.
AHRI Certificate Number	204633302
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

What does the 17 SEER2 rating mean in practical terms? +

SEER2 measures cooling efficiency under real-world conditions. At 17 SEER2, this unit uses roughly 20% less electricity than baseline 14 SEER equipment, translating to $150 to $300 annual savings depending on climate and usage. The two-stage compressor ramps down during mild weather, boosting efficiency further.

Will this system fit my existing upflow furnace space? +

The 30 inch height, 21 inch width, and depth fit most furnace closets and basements. Verify your current space dimensions before ordering. The A-coil configuration takes additional space above the furnace, so confirm 18 to 24 inches of clearance. Call your HVAC contractor to measure before purchasing.

How much will heating costs run with 80% AFUE efficiency? +

80% AFUE means 20% of fuel heat escapes through the flue. In cold climates with natural gas, annual heating costs average $800 to $1,200 depending on thermostat settings. Upgrading to 90% AFUE saves roughly $150 to $250 yearly, paying back in 3 to 5 years for northern homes.

How does this Goodman compare to Lennox or Carrier alternatives? +

Goodman offers similar SEER2 and AFUE ratings at lower prices than Lennox or Carrier premium lines. Reliability is comparable across brands. Goodman trades slightly on noise and aesthetic design but maintains strong parts availability through most contractors nationwide.

What happens if something breaks after year five? +

After the 10-year warranty expires, repairs are your responsibility. Service calls run $150 to $300, plus parts. Scroll compressors typically last 15 to 20 years with proper maintenance, so major failures beyond year 10 are less common than early defects.

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