3 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Heat Pump System - Upflow Review 2026

// Bottom Line

This system works best for budget-conscious homeowners or contractors in mixed climates who prioritize upfront cost savings over premium efficiency ratings. At $736, you're getting competent cooling and heating without paying for high-end SEER2 performance, making it practical for rental properties or homes where occupants won't stay long-term.

Review

Goodman's 3-ton gas furnace and heat pump system positions itself squarely in the value segment, and at $736, it delivers on that promise. This upflow configuration suits standard basement or utility closet installations in residential homes. Online Supply markets this as an accessible entry point for contractors and homeowners who need functional equipment without premium pricing. The combination addresses both heating and cooling demands in one integrated package, simplifying procurement for new construction or full system replacements.

Performance specs reveal a competent, if not class-leading, system. The heat pump provides 36,000 BTU of cooling with a 15 SEER rating, while the gas furnace contributes 36,000 BTU heating output at 80% AFUE. Two-stage operation on both heating and cooling means the system modulates capacity rather than cycling on and off constantly, reducing energy waste. The variable speed blower motor at 2,000 CFM maximum allows better humidity control and part-load efficiency. However, 15 SEER falls behind competitors offering 16-18 SEER at similar price points, and 80% AFUE trails modern 95%+ models by roughly 10-15% in gas efficiency.

Pros & Cons

Pros

Exceptional price point at $736 for a complete 3-ton heat pump and furnace combo
Variable speed blower motor handles up to 2,000 CFM for better comfort and humidity control
Two-stage heating and two-stage cooling reduces short cycling and improves efficiency
Energy Star certified with 15 SEER cooling rating, qualifying for some rebate programs
10-year parts warranty with online registration provides reasonable protection against defects

Cons

80% AFUE furnace efficiency is entry-level, meaning higher gas bills compared to 95%+ models
15 SEER cooling is middling by today's standards, with competitors offering 16-18 SEER at similar prices
73 dB noise level is moderately loud during operation, noticeable in quiet neighborhoods
Requires metal exhaust flue and specific 208/230V single-phase electrical setup

Who Should Buy

Best For

Contractors building rental units or multi-family properties where upfront equipment cost directly impacts project margins. Homeowners in moderate climates facing a furnace replacement who don't plan to stay more than 7-10 years and can't justify premium efficiency tiers.

Consider Alternatives If

Anyone in extreme heating climates or seeking lower operating costs should look at 95%+ AFUE furnaces and 16+ SEER heat pumps instead.

3 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

$736

Buy at HVACDirect →

Installation

This upflow unit measures 38.25 inches tall, 35.5 inches wide, and 35.5 inches deep, fitting standard utility closet and basement spaces. Electrical requirements are 208/230V single-phase 60 Hz with a 20.3 to 35 amp breaker range. Metal exhaust flue is mandatory for the gas furnace. Refrigerant lines (R410A) run suction and liquid lines up to 50 feet, with insulation thickness of 3/4 inch on the suction side. Professional installation is strongly recommended for proper airflow balance and refrigerant charging.

Warranty & Reliability

Goodman backs this system with a 10-year parts warranty, activated through online registration. This covers defective components but excludes labor costs, which vary by contractor. Ten years aligns with typical equipment lifespan for budget-tier systems, offering reasonable protection against manufacturing defects. Warranty registration is straightforward and critical, as non-registered units receive shorter coverage windows.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	36,000
Refrigerant	R410A
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
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	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Height	38.25"
Width	35.5"
Depth	35.5"
Resources	Goodman Specifications Goodman Customer Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Technical Information Goodman Technical Publication 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.
Liquid Line	3/8"
Suction Line	7/8"
Tonnage	3 Ton
Style	A-Coil
Product Features	Rebate Available, Two Stage Condenser
Energy Star	Yes
SEER1 (Efficiency)	16
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	20.3 amps
Valve Type	Sweat
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

How does the 15 SEER rating compare to other units at this price? +

15 SEER is respectable but mid-tier. Competitors in the $700-900 range often deliver 16-18 SEER cooling. The difference means roughly 5-10% higher cooling costs over 15 years. If your electricity costs are high, spending $150-200 more upfront for 17 SEER could save money long-term. For moderate climates or short-term ownership, 15 SEER is acceptable.

Can this furnace run on propane instead of natural gas? +

Yes, the specs confirm dual fuel capability for both propane and natural gas. However, conversion requires a certified technician to swap the burner jets and adjust gas pressure. Verify your local installer has propane conversion experience before purchasing, as not all HVAC shops handle this procedure. Propane typically costs 15-25% more per BTU than natural gas.

Is 80% AFUE furnace efficiency worth the cost savings versus 95%? +

Not in cold climates where heating runs 6+ months yearly. A 95% AFUE furnace costs roughly $400-600 more but recycles 15 percentage points of heat into your home. On $1,200 annual heating bills, that difference recovers itself in 4-5 years, with savings continuing. In mild climates, the payback extends beyond 10 years, making the budget model more logical.

How does the two-stage compressor improve performance? +

Two-stage cooling runs at reduced capacity during mild weather, cutting compressor cycling frequency and improving efficiency by 8-12%. Full capacity kicks in only during peak summer heat. This also reduces noise and extends compressor life compared to single-stage designs that toggle on and off constantly, improving both comfort and reliability over time.

Does online registration for the warranty really matter? +

Yes, critically. Unregistered units typically receive 5-year coverage instead of 10 years. Registration takes 10 minutes online and costs nothing. Keep your receipt and original installation documentation. Without proof of professional installation, some claims may be denied, so verify coverage scope before hiring your installer.

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