3 Ton 16 SEER 97% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman system is ideal for budget-conscious homeowners and contractors seeking solid efficiency without premium pricing. The 97% AFUE furnace and SEER 18 air conditioner make it practical for moderate climates where both heating and cooling get regular use.

Review

This 3-ton Goodman combo system represents the practical middle ground in residential HVAC. Priced at $736 with energy rebates available, it combines a gas furnace and air conditioner into one SKU for straightforward installation. The unit carries Energy Star certification and a 10-year warranty with online registration. For contractors and homeowners replacing older equipment, this system delivers modern efficiency standards without luxury-tier pricing that often doesn't justify the investment.

The efficiency numbers genuinely impress at this price tier. The furnace achieves 97% AFUE using modulating burners that adjust output rather than cycle on and off, while the air conditioner reaches SEER 18 with a two-stage scroll compressor. The variable-speed ECM blower runs at 1200 CFM maximum and adapts to demand automatically. Refrigerant options include both R410A and R22 compatibility. At 71 dB operating noise, this unit remains quieter than many competitors in the budget category.

Pros & Cons

Pros

SEER 18 cooling efficiency rated well above baseline 13 SEER standard, cutting AC energy costs measurably
97% AFUE furnace efficiency means minimal heating fuel waste, tops most residential gas furnaces
Modulating burner stages provide precise heat output rather than on-off cycling, improving comfort
Variable-speed ECM blower motor adapts to demand, reducing unnecessary runtime and electricity consumption
Two-stage compressor and scroll design deliver quieter operation at 71 dB and longer component life

Cons

Spec sheet lists confusing tonnage discrepancy (3 ton vs 3.5 ton) that requires clarification before purchase
Title claims 80,000 BTU heating with 16 SEER cooling, but specs show 80,000 BTU and SEER 18, creating marketing inconsistency
Energy Star qualified but no mention of advanced features like smart thermostat compatibility or zone control

Who Should Buy

Best For

Homeowners in mixed-climate regions needing both reliable heating and efficient cooling should target this system. Contractors looking for affordable combo units that don't sacrifice efficiency ratings will find the modulating burner and two-stage compressor compelling.

Consider Alternatives If

Buyers in extreme cold climates should explore higher-capacity units, and those requiring premium warranty coverage beyond 10 years should compare extended options elsewhere.

3 Ton 16 SEER 97% AFUE 80,000 BTU Goodman Gas Furn

$736

Buy at HVACDirect →

Installation

This downflow/horizontal A-coil configuration suits basement or attic installation in most homes. Requires 115V single-phase 60 Hz electrical service with 21.3 to 35-amp breaker capacity, standard in residential applications. PVC plastic flue piping accommodates both natural gas and propane fuel. Standard sweat connections use 3/8-inch liquid line and 7/8-inch suction line with included 3/4-inch insulation, simplifying field connections for experienced HVAC technicians.

Warranty & Reliability

Online Supply backs this unit with 10 years coverage when registered online at purchase. This aligns with industry standards for mid-tier equipment. Comprehensive coverage protects against compressor and component failures during the warranty period. Registration is mandatory, so documentation and proof of installation matter. For extended protection beyond 10 years, contact the manufacturer about supplemental plans at installation time.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	35,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	30.000000
Feature	Spec
Product Features	Rebate Available
Energy Star	Yes
SEER1 (Efficiency)	18
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	21.3 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	7424270
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	97%
Blower Motor	Variable Speed - ECM
Maximum CFM	1200
Configuration	Upflow / Downflow
Flue Location	Right
Burner Stages	Modulating
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Does this system qualify for utility rebates? +

Yes, Online Supply advertises rebate availability on this listing. Rebate amounts vary by location and utility provider. Contact your local electric and gas companies for current incentive programs, which often range from $300 to $1,200 for ENERGY STAR certified systems. Keep purchase documentation and have the installer register the unit properly.

What's the difference between SEER 18 and the advertised 16 SEER in the title? +

The specifications clearly show SEER 18 efficiency rating. The product title appears inconsistent with the actual specs. Verify directly with Online Supply that SEER 18 is the correct rating before purchase. This discrepancy suggests reviewing all documentation carefully, as marketing copy sometimes lags behind updated equipment ratings.

Is this unit right for a home in Minnesota winters? +

The 80,000 BTU heating capacity suits moderate to moderately cold climates adequately. Minnesota's most severe winters may require sizing verification through a professional load calculation. An HVAC contractor can assess whether 3 tons meets peak heating demand. The 97% AFUE efficiency helps offset heating costs regardless of whether sizing proves sufficient.

Can I use R22 refrigerant or should I upgrade to R410A? +

This unit accepts both R22 and R410A per specifications, though R410A is standard practice for new installations. R22 phaseout continues, making future service harder as stocks deplete. New systems typically install R410A, which also pairs with modern lubricants for better component protection and efficiency.

What happens if something fails after the 10-year warranty expires? +

Coverage ends after 10 years, leaving you responsible for repairs. Compressor replacement alone typically costs $1,000 to $2,500. Extended warranties available at purchase offer peace of mind. After year 10, evaluate whether repair or replacement makes financial sense based on system age.

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