3 Ton 17 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system works best for homeowners in moderate climates who want reliable heating and cooling without premium-tier pricing. The 80% AFUE furnace and 18 SEER cooling deliver respectable efficiency gains over older equipment, making it a practical choice for budget-conscious replacements.

Review

Goodman's 3-ton gas furnace and air conditioner system represents the practical middle ground in the residential HVAC market. With 100,000 BTU heating capacity and 35,000 BTU cooling output, this upflow configuration addresses moderate climate demands without premium pricing. The dual-fuel flexibility for natural gas or propane adds installation flexibility, while the Energy Star rating signals reasonable efficiency for replacement projects targeting systems installed before 2010.

Performance metrics show competent, if not exceptional, engineering. The 80% AFUE furnace converts four-fifths of fuel energy to usable heat, leaving 20% in exhaust losses. Cooling delivers 18 SEER efficiency using R410A refrigerant and a scroll compressor, meeting modern efficiency standards without entering high-efficiency territory. The two-stage configuration on both heating and cooling sides allows partial-load operation, reducing short-cycling and extending component lifespan compared to single-stage alternatives.

Pros & Cons

Pros

18 SEER cooling efficiency qualifies for Energy Star and lowers summer operating costs by 20-30% versus 14 SEER units
Two-stage burner and two-stage compressor provide modulated performance, reducing temperature swings and extending runtime efficiency
Variable-speed blower motor distributes air more evenly throughout the home compared to single-speed alternatives
Compact 21x21x30 inch footprint fits standard closets and utility spaces without major ductwork modifications
10-year warranty with online registration covers parts and labor on most components

Cons

80% AFUE is outdated by modern standards, 95%+ AFUE systems now dominate the mid-range market and save $200-400 annually
71 dB operating noise is noticeably louder than premium variable-speed systems running at 65-68 dB
Two-stage design underperforms during partial-load conditions compared to true modulating furnaces found in higher tiers

Who Should Buy

Best For

Homeowners replacing 15+ year old equipment who prioritize upfront savings over long-term efficiency gains, particularly in regions with moderate heating demands. Contractors seeking reliable baseline equipment for rental properties or budget-conscious clients also benefit from the straightforward installation and proven Goodman reliability.

Consider Alternatives If

Anyone in cold climates where furnace runtime exceeds 1500 hours yearly should invest in 95%+ AFUE units instead, as the energy payback justifies the higher initial cost.

3 Ton 17 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

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Installation

Installation requires metal exhaust flue venting and 208-230V single-phase 60Hz electrical service with 21.9 to 35-amp breaker capacity. The 73-pound unit fits upflow or horizontal configurations in standard utility closets. Sweat-type refrigerant connections (3/8 inch liquid, 7/8 inch suction lines) demand certified EPA-licensed technicians for proper brazing and evacuation procedures.

Warranty & Reliability

Ten-year parts and labor coverage activates through online registration, protecting against compressor failure, heat exchanger defects, and motor burnout. Coverage excludes maintenance issues and improper installation damage. This warranty aligns with industry standards but trails some competitors offering 12-year terms on similar mid-tier equipment.

Specifications

SKU	CAPT4961C4
Brand/Manufacturer	Goodman
Cooling BTU	35,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	73.000000
Feature	Spec
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
Height	30"
Width	21"
Depth	21"
Resources	CAPT Installation Manual CAPT 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	5 Ton
Valve Type	Sweat
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil

Frequently Asked Questions

Does this 3-ton system match my home's cooling needs? +

The 35,000 BTU cooling capacity suits 1,200-1,500 square foot homes in moderate climates. Use professional load calculations to confirm sizing, as undersized units run continuously while oversized units cycle rapidly, reducing efficiency and comfort. Goodman also offers 4 and 5-ton variants if your load calculations exceed 3-ton capacity.

Can I install this furnace in my existing ductwork? +

Yes, the upflow configuration fits standard utility closets with minimum clearance. However, verify your ductwork matches the 2,000 CFM maximum airflow rating and that return air properly sized. Restrictive or leaky ducts reduce efficiency significantly and require sealing or replacement before installation.

How much will this system lower my energy bills compared to my 2005 furnace? +

Expect 25-30% heating cost reductions over 80% AFUE systems and 20-30% cooling savings versus 13-14 SEER units. Annual savings typically range $300-500 depending on climate, runtime, and local utility rates. Payback periods average 7-10 years through energy savings alone.

How does this system compare to Lennox or Carrier equivalents at similar price points? +

Goodman's reputation relies on competitive pricing and proven reliability rather than premium features. Carrier and Lennox mid-tier models often include quieter operation at 68-70 dB and higher AFUE ratings. However, Goodman's variable-speed blower and two-stage compressor perform comparably for residential comfort while maintaining cost leadership.

What does the 10-year warranty actually cover if my compressor fails? +

Full parts replacement and labor for compressor failure are covered under Goodman's warranty when properly registered online. Exclusions apply for improper installation, refrigerant leaks from physical damage, and lack of required maintenance. Always retain service records demonstrating annual maintenance compliance.

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