2.5 Ton 14 SEER 92% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This horizontal Goodman system works well for contractors installing in tight crawl spaces or attics where space constraints demand a compact footprint. The 92% AFUE and 14 SEER ratings deliver respectable efficiency without premium pricing, making it practical for homeowners upgrading older equipment.

Review

This Goodman horizontal gas furnace and air conditioner combination addresses a specific market need: compact installations where traditional upright equipment simply won't fit. With 100,000 BTU heating output and 92% AFUE efficiency, it bridges the gap between budget-conscious contractors and homeowners seeking reliable performance without flagship pricing. The 2.5-ton cooling capacity with 14 SEER rating places it squarely in the mid-market segment, where most residential replacements happen.

Performance data shows solid fundamentals for the price point. The 92% AFUE furnace efficiency beats government minimum standards by a meaningful margin, translating to approximately 8 percent lower heating costs versus 80% AFUE models. The 14 SEER cooling rating delivers decent seasonal efficiency, though single-stage compressor operation means the system runs at full capacity rather than modulating output. Multi-speed blower capability and PVC exhaust venting streamline installation in modern homes lacking traditional chimneys or adequate vertical space.

Pros & Cons

Pros

92% AFUE furnace rating exceeds federal minimums, reducing heating costs noticeably over baseline models
14 SEER cooling efficiency is competitive mid-range performance for 2.5-ton capacity
Compact horizontal design measures 21 inches high by 26 inches deep, fitting tight installation spaces
Multi-speed blower motor allows variable airflow up to 2000 CFM for balanced heating and cooling
PVC/plastic exhaust compatibility simplifies venting in modern homes without masonry chimneys
10-year warranty with online registration provides reasonable coverage for parts and labor

Cons

SKU shows 3.5 ton rating while title claims 2.5 ton, creating specification confusion at purchase
Single-stage burner and compressor mean less modulation, leading to slightly higher utility bills than two-stage alternatives
72 dB noise level is audible during operation, particularly noticeable in quiet homes or bedrooms
Not Energy Star certified, missing efficiency rebates available for higher-tier equipment
Cooling capacity listed as 30,000 BTU appears undersized for stated tonnage, suggesting potential mismatch

Who Should Buy

Best For

Contractors installing replacement systems in homes with limited mechanical space, and homeowners seeking solid mid-range efficiency without spending on premium brands. This unit fits well in horizontal applications where traditional vertical furnaces won't fit.

Consider Alternatives If

Energy-conscious buyers wanting to maximize rebates should skip this unit, since Energy Star certification isn't listed. Homeowners in very quiet environments may find the 72 dB output disruptive.

2.5 Ton 14 SEER 92% AFUE 100,000 BTU Goodman Gas F

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Installation

This horizontal configuration requires minimal ductwork reconfiguration, making retrofits simpler than swapping to vertical models. Installation demands 208/230V single-phase power, 17.1 to 25 amp breaker sizing, and standard refrigerant line connections using 3/8-inch liquid and 3/4-inch suction lines. PVC flue venting from the right-side exhaust simplifies exhaust routing compared to traditional metal vent pipes, reducing material costs and installation time.

Warranty & Reliability

The 10-year parts warranty requires online registration to activate, a common industry practice that protects your investment. Coverage includes compressor failure, heat exchanger defects, and internal components. However, labor coverage details aren't specified in available documentation, so clarify coverage scope with your installer before purchase to avoid unexpected service bills.

Specifications

SKU	LS38343850
Brand/Manufacturer	Online Supply
Cooling BTU	30,000
Heating BTU	100,000
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)	22.000000
Feature	Spec
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Furnace Efficiency / AFUE	92%
Blower Motor	Multi Speed
Maximum CFM	2000
Configuration	Horizontal
Flue Location	Right
Burner Stages	Single
Fuel Type	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.
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Rotary
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	25 amps
Min. Breaker Size	17.1 amps
Tonnage	3.5 Ton
Liquid Line	3/8"
Suction Line	3/4"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Why does the SKU show 3.5 tons when the title says 2.5 tons? +

This specification discrepancy appears in the manufacturer data, suggesting a potential cooling capacity mismatch. The 30,000 BTU cooling output listed aligns with 2.5-ton nominal capacity, while specifications reference 3.5-ton equipment. Verify exact tonnage with your supplier before ordering to ensure proper system sizing.

Will this furnace fit in my attic with limited headroom? +

At 21 inches tall, 21.125 inches wide, and 26 inches deep, this horizontal unit works in confined spaces where vertical furnaces cannot fit. Confirm your available space dimensions and that joists can support the 22-pound weight before installation.

How does 14 SEER compare to modern air conditioners? +

14 SEER represents solid mid-range cooling efficiency. Current premium units reach 18-20 SEER ratings, but those cost significantly more. For most homeowners, 14 SEER provides adequate savings versus older 10-12 SEER systems without premium pricing, typically reducing cooling costs by 15-20 percent.

Is single-stage operation going to waste energy compared to two-stage systems? +

Yes, single-stage burners run at full 100,000 BTU output constantly, cycling on and off rather than modulating. Two-stage units run at partial capacity most of the time, reducing energy waste and wear. The efficiency gap typically costs $100-200 annually in heating expenses versus comparable two-stage models.

Does the 10-year warranty cover labor costs? +

The warranty description specifies 10 years with registration but doesn't explicitly state labor coverage terms. Contact the seller or Goodman directly to confirm whether labor costs are included, as many warranties cover parts only.

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