2.5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Horizontal Review 2026

// Bottom Line

This horizontal configuration works best for attic or basement installations where vertical space is limited and upflow orientation isn't possible. The 96% AFUE furnace and multi-speed ECM blower make it efficient for mixed-climate regions, though pricing information is absent.

Review

The Goodman 2.5-ton horizontal system represents a practical solution for retrofit installations where traditional vertical furnaces won't fit. Online Supply positions this unit as a complete comfort solution combining furnace and air conditioning in one package. The horizontal A-coil design appeals to contractors working in constrained spaces like attics and crawlspaces, where conventional upflow units create installation headaches. Goodman's reputation for reliable midrange equipment backs this offering, though specification discrepancies between the product title and actual unit specs warrant careful attention during ordering.

Performance ratings show a furnace delivering 100,000 BTU at 96% AFUE efficiency, which ranks solid for gas-fired systems. The air conditioning condenser produces 29,000 BTU cooling with a SEER1 rating of 16, exceeding the 15 SEER claim in the title. The multi-speed ECM blower motor handles up to 1,600 CFM, automatically matching airflow to actual heating and cooling loads. Two-stage burners on the furnace improve efficiency at part load, though the single-stage compressor on the AC side limits cooling flexibility during moderate-load conditions.

Pros & Cons

Pros

96% AFUE furnace efficiency with two-stage burners for better modulation and comfort
SEER1 16 rating on the condenser unit exceeds the stated 15 SEER marketing claim
Multi-speed ECM blower motor adjusts to actual heating and cooling demand, reducing energy waste
Horizontal A-coil configuration fits tight attic or basement spaces where standard upflow units won't fit
10-year warranty with online registration provides solid coverage for parts and labor peace of mind
PVC exhaust flue compatibility simplifies installation in homes with tight chimney access

Cons

Spec sheet lists 3.5-ton actual tonnage but product title claims 2.5-ton, creating confusion for sizing accuracy
Cooling capacity of 29,000 BTU doesn't align well with 2.5-ton marketing, potentially undersizing cooling for hot climates
Single-stage compressor means less efficient part-load operation compared to variable-capacity competitors
Weight of only 30 lbs seems unusually light for a 3.5-ton unit, raising durability questions
No pricing provided makes value assessment impossible for budget-conscious buyers

Who Should Buy

Best For

Contractors installing replacement systems in homes with limited vertical space, particularly in attics or basements where horizontal orientation is mandatory. This unit suits mixed-climate homeowners prioritizing furnace efficiency and quiet operation through the ECM motor.

Consider Alternatives If

Hot-climate homeowners needing aggressive cooling capacity should look at higher-tonnage units, and buyers in areas with extreme temperatures may want two-stage compressors for better part-load efficiency.

2.5 Ton 15 SEER 96% AFUE 100,000 BTU Goodman Gas F

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Installation

Installation requires 115V single-phase 60Hz electrical service with a 17.1 to 25-amp breaker, making it compatible with most residential panels. The horizontal orientation demands careful ductwork planning above or beside the unit. Connection points include 3/8-inch liquid lines and 7/8-inch suction lines, with 50 feet of pre-insulated suction line included. PVC exhaust venting simplifies flue routing compared to metal alternatives. This configuration suits attics and mechanical rooms but needs proper support and vibration isolation.

Warranty & Reliability

Goodman provides a 10-year parts warranty when you register the unit online after purchase. This covers compressor, heat exchanger, and major components, which is competitive for the price range. Labor coverage typically varies by installer and regional agreements, so clarify with your contractor before installation. Registration is required within 30 days to activate the full term.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	115 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	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Multi-Speed - ECM
Maximum CFM	1600
Configuration	Horizontal
Flue Location	Right
Burner Stages	Two
Fuel Type	Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Why does the product title say 2.5 ton but the specs show 3.5 ton? +

This appears to be a listing error between the marketing title and actual unit specifications. The specs clearly state 3.5-ton tonnage and 29,000 BTU cooling capacity. Verify with Online Supply before ordering to confirm which unit you're actually receiving, as this affects sizing and system performance.

Can this horizontal unit be converted to upflow orientation? +

The A-coil design permits both horizontal and upflow positions, but converting requires repositioning the entire unit and rerouting refrigerant lines. This isn't a field conversion you'd do casually. Keep it horizontal unless your installation specifically changed since planning.

How does the 96% AFUE compare to modern condensing furnaces? +

96% AFUE is competitive and indicates this is a condensing furnace, capturing heat from exhaust gases. Most modern high-efficiency furnaces range from 95-98% AFUE. At this efficiency level, you'll see measurable heating cost reduction compared to older 80% units, justifying the upgrade in heating-dominated climates.

Is the single-stage AC compressor a limitation compared to two-stage models? +

Single-stage compressors run fully on or fully off, using more energy during partial cooling loads. Two-stage competitors modulate capacity, improving efficiency in shoulder seasons. For consistently hot climates, two-stage is better, but in mixed climates this unit performs adequately, especially with the multi-speed blower helping fine-tune comfort.

What does the 10-year warranty actually cover? +

Online registration activates coverage for compressor, heat exchanger, and internal components for ten years from installation. This typically covers parts only, with labor costs handled separately through your installer's service agreement. Read the registration documents carefully.

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