3.5 Ton 13 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman system makes sense for budget-conscious homeowners and contractors working with tight margins on replacement jobs. At $647, you're getting a competent two-stage furnace paired with a single-stage air conditioner that won't win efficiency awards but delivers dependable year-round comfort.

Review

The Goodman 3.5-ton upflow system represents a straightforward approach to HVAC replacement. At $647, it sits at the entry level of the market, appealing to budget-minded contractors and homeowners avoiding unnecessary complexity. This is a genuine combination unit pairing furnace and air conditioning in one package, not a stripped-down product. It carries Goodman's established reputation for dependability without premium pricing that comes with variable-capacity or high-SEER alternatives.

Performance metrics show this system delivers adequate efficiency for its price point. The furnace generates 100,000 BTU of heating capacity at 80% AFUE, which meets baseline efficiency requirements set by federal standards. The 3.5-ton air conditioner produces 42,000 BTU of cooling at 13 SEER, operating on a single-stage compressor that cycles on and off rather than modulating output. The two-stage burner on the furnace side provides better heating control than single-stage alternatives, though the cooling side lacks similar sophistication.

Pros & Cons

Pros

Exceptional value at $647 for a complete 3.5-ton heating and cooling combo
Two-stage burner on furnace allows modulated heating, reducing short-cycling and improving comfort
Variable-speed blower motor provides flexibility in airflow management up to 2000 CFM
80% AFUE meets minimum efficiency standards without premium pricing
10-year warranty with online registration covers both components
R410A and R22 refrigerant compatibility offers installation flexibility

Cons

13 SEER rating is baseline for modern standards, not competitive with 14-16 SEER alternatives
Single-stage condenser means cooling operates at full capacity regardless of demand
Not Energy Star certified, missing qualification for some rebate programs
75 dB noise level is louder than premium units, notable in quiet neighborhoods
Reciprocating compressor design has higher maintenance requirements than scroll types

Who Should Buy

Best For

Contractors managing tight project budgets and homeowners replacing older systems who prioritize affordability over maximum efficiency ratings. This unit works well for moderate climates where heating and cooling demands are moderate to normal.

Consider Alternatives If

Energy-conscious buyers in hot or cold climates seeking maximum efficiency, anyone eligible for utility rebates requiring 14+ SEER, or properties where compressor noise is a concern.

3.5 Ton 13 SEER 80% AFUE 100,000 BTU Goodman Gas F

$647

Buy at HVACDirect →

Installation

Installation requires standard HVAC procedures with no unusual complications. The upflow configuration fits standard closet or basement installations with 30-inch height and 21-inch width, leaving room for clearances. Electrical requirements are straightforward, 120V single-phase 60 Hz service with breaker sizing between 23.9 and 40 amps. Metal exhaust flue requirement is standard. Refrigerant lines use 3/8-inch liquid and 7/8-inch suction lines with standard sweat valve connections.

Warranty & Reliability

The 10-year warranty on both furnace and air conditioner components provides solid protection when registered online. This covers manufacturing defects in compressor, heat exchanger, and major components. However, coverage excludes labor and installation costs. Registration is straightforward and typically completed during startup. This warranty aligns with mid-range industry standards, offering peace of mind without the extended benefits some premium brands provide.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	75
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	7/8"
Liquid Valve Size	3/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	3.5 Ton
Valve Type	Sweat
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.
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
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 13 SEER compare to newer air conditioners on the market? +

13 SEER meets current federal minimum standards but ranks below modern alternatives. Most current replacements achieve 14-16 SEER. Higher SEER units cost more upfront but lower operating costs in warm climates. This unit suits moderate cooling demands or cooler regions where air conditioning runs fewer hours annually.

Will this system qualify me for utility rebates? +

Not likely. Many utility rebate programs require Energy Star certification or 14+ SEER minimum. You should contact your local utility company to confirm their current specifications. Missing Energy Star qualification eliminates access to many incentive programs that could offset initial costs.

What makes the two-stage burner better than single-stage? +

Two-stage burners operate at reduced capacity during mild weather, running longer at lower output. This eliminates rapid on-off cycling, maintaining steadier indoor temperatures and improving comfort. Single-stage systems blast heat at full 100,000 BTU regardless of outdoor temperature, creating temperature swings.

Is a reciprocating compressor less reliable than scroll types? +

Reciprocating compressors are proven designs with long track records, but they're mechanically more complex than scroll designs. They require more frequent maintenance and generate higher noise levels. Scroll compressors typically offer quieter, more efficient operation over extended service life.

Does the 10-year warranty cover refrigerant leaks or compressor failure? +

Yes, the warranty covers manufacturer defects in the compressor and refrigeration system including leaks from faulty welds or components. However, damage from installation errors, improper maintenance, or electrical issues may not be covered. Always verify specific exclusions in your warranty documentation.

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