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

// Bottom Line

This system targets budget-conscious homeowners and contractors who need a no-frills, dependable combo unit without premium efficiency ratings. At $647, it delivers reasonable performance for homes in mild to moderate climates where 80% AFUE and 15 SEER meet basic energy code requirements.

Review

Goodman's 2.5-ton combo system represents the entry-level segment of the market, designed for contractors and homeowners seeking cost-effective heating and cooling without premium features. Priced at $647, this upflow-configured unit pairs an 80% AFUE gas furnace with a 15 SEER air conditioner, making it competitive for budget-focused replacements. The system handles 100,000 BTU heating capacity and 29,000 BTU cooling output, sufficient for smaller homes and moderate climates. Online Supply's offering includes a 10-year warranty and ENERGY STAR certification, signaling basic compliance with efficiency standards.

Performance specs reveal a straightforward design prioritizing reliability over efficiency gains. The furnace delivers two-stage burner technology, allowing modulated heat output that outperforms single-stage competitors. The variable-speed blower motor adjusts CFM up to 2000, matching cooling and heating demands more smoothly. The air conditioner uses a scroll compressor with R410A or R22 refrigerant options, operating on 208/230 volts single-phase. The 71.5 dBA noise level falls in the acceptable range for residential installations. However, single-stage condenser design limits part-load cooling efficiency on mild-weather days compared to two-stage models.

Pros & Cons

Pros

Excellent price point at $647 for a matched 2.5-ton system with furnace and condenser
Variable speed blower motor optimizes airflow and comfort across heating and cooling cycles
Two-stage burner in furnace allows modulated heating for better efficiency than single-stage models
ENERGY STAR certified, qualifying for some utility rebates in select regions
10-year warranty with online registration provides reasonable long-term protection for the investment

Cons

80% AFUE is below modern standards, meaning higher heating costs compared to 90%+ units
15 SEER rating is mid-tier, not the 16+ SEER2 equivalent many newer units offer
Single-stage condenser limits cooling modulation, reducing part-load efficiency on mild days
Spec sheet shows conflicting tonnage data (title claims 2.5 ton, specs list 3.5 ton), creating confusion

Who Should Buy

Best For

Homeowners in moderate climates replacing older systems who prioritize upfront cost savings over premium efficiency, and HVAC contractors stocking a basic product line for price-sensitive customers who need straightforward, reliable heating and cooling without smart features.

Consider Alternatives If

Anyone in cold climates where 80% AFUE drives excessive heating costs, those seeking high-efficiency systems to maximize utility rebates, or homeowners wanting variable-speed condenser technology for enhanced part-load performance.

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

$647

Buy at HVACDirect →

Installation

Installation complexity is moderate for qualified HVAC technicians. The unit requires 208/230V single-phase power with 17.1 to 25-amp breaker sizing. Metal exhaust flue piping is mandatory for the furnace. Standard refrigeration lines consist of 3/8-inch liquid and 7/8-inch suction connections with 3/4-inch insulation, accommodating up to 50 feet of line sets. The compact 30-by-21-by-21-inch footprint fits tight utility closets. Upflow configuration suits basements and crawlspaces but requires proper return air ducting for performance.

Warranty & Reliability

Coverage extends 10 years on all components with online registration, a reasonable middle ground between economy units (5-year) and premium systems (10-year parts plus compressor extensions). Registration is straightforward and typically completed during installation. The warranty covers manufacturer defects in compressor, heat exchanger, and components but excludes wear items and improper installation. Homeowners should retain documentation for any claims.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
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)	71.5
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	30"
Width	21"
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.
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
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What's the difference between the 2.5-ton title and 3.5-ton specification listed? +

This is a critical discrepancy in the product data. The title claims 2.5 tons cooling capacity, but the specs show 3.5 tons. Verify with the seller before purchase. Typically, 2.5-ton refers to the air conditioning tonnage, which should match cooling BTU output. The 29,000 BTU cooling capacity aligns closer to 2.4 tons, suggesting the specs contain errors. Request clarification on actual tonnage before installation.

Can this system work in a horizontal or downflow attic installation? +

The specs list 'Upflow/Horizontal' and 'Upflow/Downflow' configuration options, suggesting flexibility. However, the product title specifies upflow only. Horizontal and downflow conversions typically require ductwork modifications and different coil orientations. Contact Goodman or your installer to confirm whether this specific unit SKU (LS38783850) supports horizontal or downflow operation without hardware changes.

How does 15 SEER compare to newer efficiency standards? +

15 SEER represents solid mid-tier efficiency but trails modern 16+ SEER2 standards. For a 2.5-ton system cooling 1,200 square feet, the annual cooling cost difference versus 18 SEER could reach $100-150 annually in moderate climates. The 80% AFUE furnace similarly underperforms 90-95% units by roughly $20-40 monthly in winter heating costs. Lower initial price offsets modest efficiency penalties for budget buyers.

How does this compare to entry-level units from Carrier or Lennox? +

Goodman typically undercuts Carrier and Lennox pricing by 15-25% at equivalent efficiency tiers. A comparable Carrier 2.5-ton 15 SEER system runs $850-950. Goodman prioritizes affordability over premium warranty terms and brand prestige. Reliability across brands is comparable for basic models, though Carrier and Lennox offer slightly wider dealer networks and customer support infrastructure in major markets.

Does online registration for the warranty automatically process? +

No, registration is manual and typically completed via Goodman's website or through your HVAC contractor. Most contractors handle registration during commissioning. Failure to register voids the warranty extension benefits. Retain all documentation and purchase receipts. Registration usually requires serial numbers from both furnace and condenser units.

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