2.5 Ton 15 SEER 96% AFUE 40,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman system delivers serious efficiency gains for contractors and homeowners upgrading older equipment, particularly in mixed climates where both heating and cooling performance matter. The 96% AFUE furnace paired with a 16 SEER condenser makes it genuinely competitive against premium brands at a lower price point.

Review

The Goodman 2.5-ton system sits in a crowded mid-market segment dominated by contractor-grade equipment and big-box alternatives. This unit pairs a two-stage gas furnace with a single-stage scroll compressor condenser, targeting budget-conscious upgraders who want real efficiency gains without premium pricing. Goodman's reputation for solid durability and parts availability makes this a practical choice for both new construction and replacement applications.

The furnace delivers impressive 96% AFUE efficiency using a two-stage burner that adapts to heating demand, while the condenser rates at 16 SEER, surpassing most mid-tier competitors. The variable-speed ECM blower motor runs at 1,200 CFM maximum, adjusting throughout the day to maintain comfort without wasting electricity. At 71.5 dB, noise levels stay reasonable even during peak operation, important for bedroom-adjacent installations.

Pros & Cons

Pros

96% AFUE furnace rating significantly reduces heating costs compared to 80-90% systems
16 SEER condenser exceeds the title specification, offering better cooling efficiency than advertised
Two-stage burner provides quieter operation and more precise temperature control at 71.5 dB
Variable-speed ECM blower motor optimizes comfort and reduces energy waste throughout the year
10-year warranty with online registration covers parts and compressor protection
Plastic PVC exhaust flue compatibility simplifies installation in retrofit applications

Cons

Single-stage compressor limits part-load efficiency compared to two-stage or inverter models
3-ton condenser tonnage mismatch with 2.5-ton title rating creates specification confusion
29,000 cooling BTU undershoots the 40,000 heating BTU, limiting balance in hot climates

Who Should Buy

Best For

Contractors upgrading residential systems in northern and mixed climates will appreciate the high furnace efficiency and straightforward installation. Homeowners prioritizing winter heating savings over cooling capacity, particularly in homes under 2,500 square feet, find this system cost-effective.

Consider Alternatives If

Skip this if you live in a cooling-dominated climate or need balanced heating/cooling capacity, since the condenser output doesn't match the furnace output.

2.5 Ton 15 SEER 96% AFUE 40,000 BTU Goodman Gas Fu

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Installation

Installation requires standard sheet metal ducting, R410A or R22 refrigerant lines sized at 3/8 inch liquid and 7/8 inch suction with 3/4 inch insulation, and 115V single-phase 60 Hz electrical service. The downflow configuration suits basements and utility closets. PVC exhaust flue simplifies venting compared to traditional metal alternatives. Most HVAC contractors complete setup in 4 to 6 hours.

Warranty & Reliability

Goodman provides 10 years of parts and compressor coverage upon online registration, a solid mid-tier protection level. This covers manufacturing defects and component failure but excludes routine maintenance, refrigerant loss from leaks, or damage from improper installation. Registration is straightforward and essential for claim eligibility.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
Heating BTU	40,000
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 Ton
Height	26"
Width	17.5"
Depth	21"
Resources	CAPF Installation Manual CAPF 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.
AHRI Certificate Number	7368837
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1200
Configuration	Upflow / Downflow
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

Why does the title say 2.5 tons but specs show 3 tons? +

The condenser is rated 3-ton capacity, but the system is marketed as 2.5-ton for typical residential applications. This creates a slight oversizing for cooling. Verify your home's actual cooling load with a manual J calculation before ordering to confirm proper fit.

Can I use this to replace my old R22 system? +

Yes, this unit accepts both R410A and R22 refrigerant, making it retrofit-compatible with older installations. However, mixing refrigerants is forbidden. Completely evacuate old R22 and flush lines before charging with new R410A to avoid cross-contamination and system damage.

How much will this reduce my heating bills compared to an 80% AFUE furnace? +

At 96% AFUE versus 80%, you convert 16 percentage points more fuel to heat. On $1,200 annual heating costs, expect savings around $200 per year in natural gas expenses. Payback typically occurs within 4 to 6 years depending on local gas prices and climate severity.

Is this better than a Lennox or Carrier system at the same price? +

Goodman's specifications match or exceed Lennox and Carrier models in this price range, but lacks their brand premium and extended warranty options. You're paying for proven performance and parts availability, not brand reputation. Contractor support and local service availability matter more than brand name.

Does the 10-year warranty include labor? +

No, the 10-year coverage limits to parts and compressor replacement only. Labor, diagnostics, and service calls are your responsibility. Extended service plans through your installer may cover labor if purchased separately at time of installation.

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