3 Ton 14 SEER 97% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This is ideal for budget-conscious homeowners and contractors replacing aging 3-ton systems, especially in moderate climates where the 97% AFUE furnace and 16 SEER2 air conditioner deliver genuine energy savings. At $643, it represents exceptional value for a matched, AHRI-certified Goodman system with solid warranty backing.

Review

Goodman has dominated the value HVAC market for years, and this 3-ton downflow system shows why. At $643 for a matched furnace and air conditioner combo, it undercuts most competitors by hundreds of dollars while maintaining solid efficiency credentials. The 97% AFUE furnace and 16 SEER2 air conditioner both carry Energy Star labels, meaning buyers get certified efficiency without premium pricing. The downflow configuration fits tight spaces, making this a practical choice for attic installations in existing homes.

Performance specs are honest without pretense. The furnace delivers 80,000 BTU of heating using a modulating burner that adjusts output, and the air conditioner produces 34,800 BTU of cooling with a scroll compressor. The variable-speed ECM blower motor caps out at 1,200 CFM and runs efficiently at lower speeds between cycles. Refrigerant compatibility covers both R410A and R22, useful if you are replacing older systems. At 73.5 dB, noise levels run slightly higher than premium models, but typical for this price tier and cooling capacity.

Pros & Cons

Pros

97% AFUE heating efficiency means nearly all fuel converts to usable heat, reducing gas bills significantly
16 SEER2 cooling rating is well above 14 SEER minimum, earning Energy Star certification
Modulating burner stages adjust heating output automatically, preventing short-cycling and improving comfort
Variable-speed ECM blower motor runs at lower speeds when possible, cutting electricity consumption
Downflow A-coil configuration works in tight attic spaces, simplifying retrofits in existing homes

Cons

73.5 dB noise level is louder than premium variable-capacity systems, noticeable during heating cycles
Single-stage compressor cannot modulate cooling capacity, so it cycles on and off rather than running continuously at part load
Entry-level Goodman brand lacks premium features like two-stage heating or inverter-driven cooling found in higher-tier units

Who Should Buy

Best For

Budget-focused homeowners replacing worn furnaces and air conditioners, and HVAC contractors stocking reliable 3-ton packages for residential replacement jobs. This system makes sense if energy efficiency matters but premium bells and whistles do not.

Consider Alternatives If

Anyone in extremely cold climates needing backup electric heat should consider systems with staged heating, and homeowners in already-quiet neighborhoods may want to compare noise levels against variable-capacity competitors.

3 Ton 14 SEER 97% AFUE 80,000 BTU Goodman Gas Furn

$643

Buy at HVACDirect →

Installation

Downflow installation suits attic or basement spaces where ductwork runs downward through the home. The A-coil design requires proper condensate drainage, and PVC or plastic flue venting is mandatory. Connection points include 3/8 inch liquid lines and 7/8 inch suction lines with 3/4 inch insulation. Electrical demand runs 115V single-phase 60 Hz with breaker sizing between 18.7 and 30 amps. Standard residential installation typically takes one to two days.

Warranty & Reliability

Goodman backs this system with a 10-year parts and labor warranty when you complete online registration. Registration is straightforward and protects your investment across the compressor, heat exchanger, and all major components. Ten years is competitive at this price point, though some premium brands offer longer coverage. Keep your registration documentation accessible for service calls.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73.5
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	30 amps
Min. Breaker Size	18.7 amps
Tonnage	3 Ton
Height	34.5"
Width	17.5"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® 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.
Configuration	Downflow/Horizontal
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
AHRI Certificate Number	7424270
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	97%
Blower Motor	Variable Speed - ECM
Maximum CFM	1200
Flue Location	Right
Burner Stages	Modulating
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What does 97% AFUE actually mean for my heating costs? +

AFUE measures how efficiently fuel converts to heat. At 97%, this furnace wastes only 3% of gas as exhaust, compared to 80-90% on older units. A typical home spending $1,200 yearly on heating might save $200 or more annually. Savings depend on your local gas rates, climate, and home insulation quality.

Can this system handle R22 refrigerant if I have an old R22 system? +

Yes, it accepts both R410A and R22, which is helpful during transition periods. However, R22 is being phased out and becomes increasingly expensive. Many contractors recommend installing R410A and retiring the old R22 unit completely rather than mixing refrigerant types across equipment.

Is a 16 SEER2 rating good for cooling efficiency? +

Absolutely. SEER2 replaced the older SEER rating in 2023 and uses tougher testing standards. A 16 SEER2 unit exceeds minimum requirements and qualifies for Energy Star status. Expect cooling electricity costs 20 to 30 percent lower than 14 SEER models in comparable homes.

How does the modulating burner improve comfort compared to single-stage heating? +

Modulating burners vary flame size based on heating demand rather than cycling full-on and full-off. Your home reaches target temperature faster, maintains steadier warmth, and uses less gas during mild days. Single-stage burners work fine, but modulating technology prevents temperature swings and improves efficiency.

What does the 10-year warranty actually cover? +

Parts and compressor labor are covered when you register online. It protects major components like the heat exchanger and compressor. Installation defects and maintenance issues may fall outside coverage, so ask your installer about extended service plans if desired.

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