Goodman 3.5 Ton 14 SEER 80% 120,000 BTU Furnace & AC System - R410A Upflow Review 2026

// Bottom Line

This Goodman system works best for budget-conscious homeowners and contractors replacing aging equipment in moderate climates where 80% AFUE heating and 16 SEER cooling are acceptable. At $415, you're getting a competent workhorse that prioritizes affordability without sacrificing essential performance standards.

Review

The Goodman 3.5-ton system represents a solid entry point in the mid-tier HVAC market. Supplied by Online Supply and built with proven scroll compressor technology, this combo unit handles the heating and cooling needs of typical 1,500 to 1,800 square-foot homes. The upflow A-coil configuration makes integration straightforward in conventional basement or utility room installations, while the $415 price point positions it competitively against other nameplate brands in the accessible segment.

Cooling delivers 42,000 BTU at 16 SEER2 efficiency, which actually exceeds the advertised 14 SEER specification and should result in tangible summer energy savings. The heating side produces 120,000 BTU at 80% AFUE using a two-stage gas burner, meaning it runs efficiently during moderate winter days and kicks to full output during cold snaps. Multi-speed blower motor modulation helps manage comfort without constant cycling, though the single-stage compressor will cycle on-off rather than ramp smoothly.

Pros & Cons

Pros

16 SEER2 cooling efficiency exceeds the advertised 14 SEER rating, delivering better-than-expected performance on utility bills
Dual-stage burner and multi-speed blower motor enable flexible heating and cooling operation across seasons
Single-stage scroll compressor is proven technology with fewer failure points than variable-speed alternatives
Upflow A-coil configuration fits standard return-air setups in most residential installs
10-year warranty with online registration provides solid coverage at this price point

Cons

80% AFUE is adequate but trails modern 95% AFUE systems by approximately 15 points, costing more long-term
Single-stage cooling compressor cycles on-off rather than modulating, reducing comfort during mild weather operation
73 dB noise level is noticeably louder than variable-speed competitors, problematic for noise-sensitive areas

Who Should Buy

Best For

Contractors handling budget residential replacements in transitional climates and homeowners in areas where high-efficiency equipment costs exceed their budget. This system delivers adequate comfort and efficiency for homes that don't demand premium performance.

Consider Alternatives If

Anyone prioritizing lowest operating costs, seeking ultra-quiet operation, or living in cold climates where 80% AFUE means significant annual heating waste compared to condensing alternatives.

Goodman 3.5 Ton 14 SEER 80% 120,000 BTU Furnace &

$415

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Installation

Installation requires standard R410A refrigerant line setup with 3/8-inch liquid line and 7/8-inch suction line, both supplied with 1/2-inch insulation over 50 feet. The 120V, 60Hz single-phase electrical demand sits between 22.4 and 35 amps, fitting standard residential panels. Metal exhaust flue is mandatory. Most installations take 4-6 hours for experienced crews familiar with A-coil upflow geometry.

Warranty & Reliability

Online registration activates a 10-year parts and labor warranty covering manufacturing defects, compressor failure, and coil leaks. Registration is straightforward and required immediately after installation. This protection level is competitive for the price range but shorter than premium 12-year warranties on higher-tier equipment.

Specifications

SKU	LS381183850
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
Heating BTU	120,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	48.000000
Feature	Spec
Product Features	Rebate Available
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	35 amps
Min. Breaker Size	22.4 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Height	30"
Width	24.5"
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.
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Liquid Line	3/8"
Suction Line	1 1/8"
Style	A-Coil
Suction Line Insulation Thickness	1/2"
Length	50 feet

Frequently Asked Questions

Does this system use R410A refrigerant, and is it compatible with existing R22 equipment? +

The specs indicate dual compatibility with both R410A and R22, though you cannot mix refrigerants. If replacing an R22 indoor coil, ensure your contractor specifies the correct charge. New installations should use R410A exclusively since R22 production has ceased.

What electrical work is needed before installation? +

Your breaker box needs a 30-35 amp circuit dedicated to the unit. Most homes have available capacity. The 120V, 60Hz, single-phase requirement is standard residential. Have a licensed electrician confirm adequate service before your HVAC contractor arrives.

How does 80% AFUE compare to modern furnaces in heating efficiency? +

80% AFUE means 20% of gas energy escapes up the chimney. Today's condensing furnaces reach 95%+ AFUE, cutting heating waste significantly. Over 15-20 years, that efficiency gap adds thousands to heating bills, especially in cold climates.

Is 16 SEER2 good enough, or should I pay more for variable-speed cooling? +

16 SEER2 is respectable for moderate climates and typical usage. Variable-speed systems hit 20+ SEER2 and reduce noise, but cost 40-60% more upfront. If your electric bills are under $80 monthly for cooling, single-stage performance suffices.

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

Yes, the registered warranty covers compressor and sealed-system failures due to manufacturing defects. Leaks from installation errors or physical damage are excluded. Register immediately after installation to activate coverage.

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