3 Ton 17 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Horizontal Review 2026

// Bottom Line

This Goodman system makes sense for budget-conscious homeowners upgrading from older equipment in moderate climates where heating demands aren't extreme. At $89, you're getting respectable 17 SEER cooling and 80% AFUE heating with variable-speed blower technology, though you'll sacrifice some efficiency compared to higher-tier units.

Review

The Goodman 3-ton horizontal gas furnace and heat pump system targets cost-conscious buyers looking to replace aging equipment without premium pricing. Online Supply positions this unit as an entry-level solution combining gas heating with heat pump cooling in one package. The horizontal configuration suits attic or basement installations common in retrofit situations. At $89, you're entering the value segment rather than the performance tier, but the equipment delivers measurable efficiency improvements over 15-year-old systems.

Performance specs reveal a competent but not exceptional machine. The 17 SEER cooling rating handles moderate climates well, with 35,000 BTU capacity delivered by a scroll compressor using R410A or R22 refrigerant. Two-stage condenser operation reduces cycling losses during partial-load conditions. Heating delivers 35,000 BTU through two-stage burner operation at 80% AFUE efficiency, adequate for shoulder seasons but modest in sustained cold. The variable-speed blower motor adjusts from 0 to 2,000 CFM, improving comfort during low-demand periods. 72 dB sound level indicates louder operation than premium brands.

Pros & Cons

Pros

17 SEER cooling efficiency exceeds federal minimum standards by meaningful margin
Two-stage burner and condenser provide better part-load efficiency than single-stage alternatives
Variable-speed blower motor reduces runtime and energy consumption during mild weather
3.5-ton capacity handles typical single-family homes up to 2,000 square feet comfortably
10-year warranty with registration offers solid long-term protection for critical components

Cons

80% AFUE heating efficiency lags behind modern high-efficiency furnaces reaching 95% AFUE
35,000 BTU heating output is modest, limiting effectiveness in cold climates below freezing
72 dB noise level runs louder than premium competitors, noticeable during operation
Limited brand recognition compared to Carrier, Trane, or Lennox reduces resale confidence

Who Should Buy

Best For

Homeowners in mild to moderate climates seeking affordable system replacement without premium pricing. Best suited for homes under 2,000 square feet where heating demands are moderate and cooling is the primary season concern.

Consider Alternatives If

Anyone in northern climates requiring sustained heating, buyers wanting maximum efficiency ratings, or contractors needing quieter operation for noise-sensitive installations.

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

$89

Buy at HVACDirect →

Installation

Horizontal configuration requires metal exhaust flue for gas furnace section, standard in most installs. Unit operates on 208/230V single-phase 60 Hz power with 21.9 to 35-amp breaker sizing, fitting standard home electrical panels. Compact dimensions (21 by 21.125 by 26 inches) suit tight spaces. Installation needs A-coil evaporator pairing and proper refrigerant lineset configuration with 3/4-inch suction line insulation.

Warranty & Reliability

10-year warranty with online registration covers manufacturer defects on compressor, heat exchanger, and sealed refrigeration system. Registration is required, so incomplete paperwork voids coverage. Coverage is component-level rather than system-replacement, meaning failed parts get repaired or replaced rather than swapping entire units.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	35,000
Heating BTU	35,000
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	72
Weight (in lbs)	30.000000
Feature	Spec
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Configuration	Horizontal
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	21"
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.
Product Features	Two Stage Condenser
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
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How does 17 SEER compare to modern heat pump standards? +

17 SEER meets Energy Star requirements and beats federal 16 SEER minimums by modest margin. However, newer units reach 18-22 SEER regularly. If cooling dominates your climate, higher SEER investments deliver faster payback. For mild climates with light cooling use, 17 SEER suffices adequately.

Can I use this system in freezing climates? +

Not optimally. The 35,000 BTU heating output and 80% AFUE efficiency create challenges below 20 degrees Fahrenheit. Backup electric heat activates, raising operating costs significantly. Northern climates need minimum 95% AFUE furnaces and higher BTU output for economic viability.

Is the variable-speed blower worth the added cost? +

Yes, especially in mild weather. Variable-speed motors ramp down during low-demand periods, cutting energy consumption by 10-15% annually compared to single-speed alternatives. Better comfort control and quieter operation add value beyond pure efficiency metrics.

How does Goodman compare to Carrier or Lennox at similar price points? +

Goodman undercuts both on initial cost but with slightly lower efficiency ratings and build reputation. Carrier and Lennox hold value better and offer quieter operation. For budget installations where first cost drives decisions, Goodman competes effectively despite smaller brand recognition.

What happens if I don't register the warranty? +

Registration is required to activate the 10-year coverage. Without it, warranty defaults to shorter terms or becomes void. Contractors should register immediately upon installation to protect homeowner investment.

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