Independent Review · Updated June 2026

3 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Heat Pump System - Horizontal

Solid 80% AFUE furnace with 16 SEER cooling at a contractor-friendly price point

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Heat Pump System - Horizontal
Current Price
$2142
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This Goodman system works best for contractors and homeowners replacing older equipment in moderate climates where upfront cost matters. The horizontal configuration and two-stage design make it practical for attic or basement installations where space is tight.

Review

Goodman's 3-ton combination gas furnace and heat pump system occupies a practical middle ground in the budget HVAC market. At $2142, this horizontal unit targets contractors and homeowners who need reliable equipment without premium pricing. The dual-fuel design supports both natural gas and propane, making it flexible for diverse installation scenarios. While Goodman's brand reputation emphasizes value over prestige, this system delivers solid performance for straightforward replacement jobs.

The 80% AFUE rating meets 2023 federal minimums but trails modern 95% AFUE furnaces by about 15 percentage points in heating efficiency. Cooling performance reaches 16 SEER with two-stage condenser and scroll compressor technology. The two-stage burner system modulates between high and low firing rates, reducing short-cycling and improving comfort. Maximum airflow reaches 2000 CFM through the variable-speed blower, which adjusts motor speed based on system demand rather than running at constant speed.

Pros & Cons

Pros

  • Two-stage burner and condenser provide efficient partial-load operation, reducing energy waste during mild weather
  • 80% AFUE meets federal minimum standards while keeping installed price under $2200
  • Variable-speed blower motor optimizes airflow and comfort compared to single-speed alternatives
  • ENERGY STAR certified with 16 SEER cooling efficiency rating
  • Horizontal A-coil configuration fits tight spaces where vertical units won't work
  • 10-year warranty with online registration covers parts and labor

Cons

  • 80% AFUE is dated technology, significantly behind 95% AFUE high-efficiency units that cost $300-500 more
  • 16 SEER cooling rating lacks the efficiency premium of 18+ SEER systems in warm climates
  • 73 dB noise level runs louder than quieter competitors during compressor cycles

Who Should Buy

Best For

Budget-conscious contractors doing replacement work in cooler regions where furnace efficiency matters less than equipment cost. Homeowners in modest homes seeking reliable equipment without premium pricing.

Consider Alternatives If

Anyone in hot climates prioritizing cooling efficiency or buyers willing to spend more for 95% AFUE systems that cut heating costs by 15-20% over five years.

3 Ton 15 SEER 80% AFUE 80,000 BTU Goodman Gas Furn
$2142
Buy at HVACDirect →

Installation

Installation requires 208/230V single-phase power with 20.3 to 35-amp breaker capacity, standard for most residential panels. The horizontal configuration demands 38.25 inches of height and 35.5 inches square depth, fitting typical attic or basement cavities. Metal exhaust flue is required. A-coil mounting with 3/8 inch liquid line and 7/8 inch suction line (3/4 inch insulation) follows standard refrigerant practices. Technicians familiar with Goodman equipment will find straightforward ductwork connections.

Warranty & Reliability

Goodman backs this unit with a 10-year parts and labor warranty upon online registration, which is industry standard for mid-range equipment. The warranty covers compressor failure, heat exchanger defects, and component malfunctions. Online registration is essential, so document the AHRI certificate number 204633302. Labor coverage varies by dealer, so confirm details before purchase.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU36,000
Heating BTU36,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)73
Weight (in lbs)30.000000
FeatureSpec
AHRI Certificate Number204633302
Airflow DirectionUpflow/Horizontal
Exhaust Flue RequirementMetal
Furnace Efficiency / AFUE80%
Blower MotorVariable Speed
Maximum CFM2000
ConfigurationHorizontal
Burner StagesTwo
Fuel TypePropane, Natural Gas
Height38.25"
Width35.5"
Depth35.5"
ResourcesGoodman Specifications Goodman Customer Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Technical Information Goodman Technical Publication Goodman Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 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.
Liquid Line3/8"
Suction Line7/8"
Tonnage3 Ton
StyleA-Coil
Product FeaturesRebate Available, Two Stage Condenser
Energy StarYes
SEER1 (Efficiency)16
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size35 amps
Min. Breaker Size20.3 amps
Valve TypeSweat
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

What's the real-world heating output of this furnace? +
The unit delivers 36,000 BTU per hour of heating capacity. With 80% AFUE efficiency, about 28,800 BTU of that actually heats your home, with 7,200 BTU lost through exhaust. This suits homes requiring moderate heating, typical for 1500-2000 square foot spaces in mild climates.
Can I install this in my attic with limited headroom? +
Yes, the horizontal configuration is designed for attics. At 38.25 inches tall and 35.5 inches on each side, it fits most standard joist cavities. Ensure adequate clearance for the metal exhaust flue and refrigerant lines. Some attics may require reinforcement due to the 30-pound weight.
How does 80% AFUE compare to higher efficiency furnaces? +
An 80% AFUE furnace wastes 20% of fuel as exhaust heat. Modern 95% AFUE units waste only 5%, cutting heating costs roughly 15% annually. Over a furnace's 15-20 year lifespan, a 95% unit costs $400-600 more upfront but saves $2000-3000 in fuel.
Is this system better than replacing furnace and AC separately? +
Combined systems reduce installation labor and ensure component matching for reliability. This unit's two-stage design on both heating and cooling provides better efficiency than basic single-stage units. However, you're locked into Goodman parts for future service.
Do I need to register the warranty online? +
Yes, the 10-year coverage requires online registration using the AHRI certificate number 204633302. Without registration, warranty coverage defaults to shorter factory-only terms. Register immediately after installation.

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