2.5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This system works well for homeowners replacing older equipment in moderate climates who prioritize upfront savings over premium features. At $115, you're getting respectable 80% AFUE heating and 16 SEER cooling with a variable-speed blower, though single-stage cooling limits efficiency gains in peak summer.

Review

Goodman's horizontal gas furnace and air conditioner combo at $115 represents solid value in the budget-to-mid-range segment. This 2.5-ton system delivers 100,000 BTU of heating and 29,000 BTU of cooling in a compact horizontal footprint suited for tight mechanical spaces. Online Supply positions this as an affordable option for homeowners and contractors managing replacement projects where capital constraints matter.

The 80% AFUE rating and 16 SEER1 cooling efficiency place this unit in the middle tier, adequate for moderate climates but not cutting-edge. The variable-speed blower motor is the efficiency highlight, modulating output to avoid constant full-power cycling. Two-stage burner heating and R410A refrigerant support round out a practical spec sheet that prioritizes reliability over peak seasonal performance ratings.

Pros & Cons

Pros

Exceptional price point at $115 for a complete 2.5-ton combo system
Variable-speed blower motor adjusts airflow, reducing runtime and energy waste
16 SEER1 rating exceeds the stated 15 SEER in product title, qualifying for Energy Star
100,000 BTU furnace handles most residential heating needs with two-stage burner
Horizontal configuration suits tight attic or basement installations up to 26 inches deep
10-year warranty with online registration provides solid protection

Cons

80% AFUE is entry-level for furnaces; high-efficiency models reach 95%+ AFUE
Single-stage compressor runs at full capacity or off, missing mid-load efficiency opportunities
71.5 dB noise level is moderately loud during peak operation

Who Should Buy

Best For

Budget-conscious homeowners in zones 3-5 replacing 15-20-year-old systems who want reasonable efficiency without premium pricing. Contractors installing in rental properties or fix-and-flip scenarios where upfront cost matters more than long-term operating expenses.

Consider Alternatives If

Homeowners in severe climates or those seeking 95%+ AFUE furnaces and variable-capacity cooling should look at premium Goodman or Lennox units instead.

2.5 Ton 15 SEER 80% AFUE 100,000 BTU Goodman Gas F

$115

Buy at HVACDirect →

Installation

Horizontal configuration requires 21 by 21.125 by 26-inch clearance and metal exhaust flue. Electrical demands are straightforward: 120V, 1-phase, 60Hz with 17.1 to 25-amp breaker sizing. Suction line insulation (3/4 inch thickness) and supplied piping connections (3/8 inch liquid, 7/8 inch suction) are standard installations manageable by any licensed HVAC contractor.

Warranty & Reliability

Ten-year full warranty applies with online registration through Goodman. This covers compressor, heat exchanger, and major components against defects. Registration is essential, so save documentation and complete enrollment promptly after installation to avoid warranty voidance.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71.5
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	25 amps
Min. Breaker Size	17.1 amps
Tonnage	3.5 Ton
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.
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
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 work with R22 refrigerant, or only R410A? +

Specifications list both R410A or R22 compatibility, though R22 is legacy refrigerant. Most new installations use R410A. Confirm your system's original charge before retrofitting, as mixing refrigerants damages compressors. Ask your technician during commissioning.

Will this 2.5-ton unit cool a 3,000-square-foot home adequately? +

Yes, assuming good insulation and moderate climate. Rule of thumb: 12,000 BTU per 400 square feet. At 29,000 BTU cooling capacity, this handles roughly 1,000 square feet effectively. Larger homes require oversizing or multiple units.

What's the difference between 16 SEER1 and the advertised 15 SEER? +

SEER1 is the newer, stricter DOE test standard replacing legacy SEER ratings. This unit exceeds the title claim, which suggests conservative marketing. Higher numbers mean better cooling efficiency and lower electric bills during summer.

How does single-stage compressor cooling compare to two-stage or variable-capacity? +

Single-stage runs at 100% output or shuts off, missing intermediate loads where premium systems modulate. Result: slightly higher cooling runtime and electricity use on mild days. Acceptable for budget buyers, but variable-capacity systems offer 5-10% efficiency gains.

Is online registration required to activate warranty coverage? +

Yes. Without registration, the 10-year coverage is void. Register immediately after installation with proof of purchase and installation date. Goodman's online portal takes five minutes.

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