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

// Bottom Line

This Goodman combo works best for homeowners upgrading from older equipment who want reliable performance without premium pricing. The 80% AFUE furnace and 14 SEER cooling deliver solid returns, though they won't match high-efficiency models in long-term energy savings.

Review

The Goodman 3.5 Ton furnace and AC combo represents a practical middle-ground option in the residential HVAC market. This bundled system pairs an 80% AFUE gas furnace with a 14 SEER air conditioning unit, positioning itself as an economical choice for homeowners upgrading aging equipment. Goodman maintains strong contractor credibility despite competitive pricing, making these systems visible in residential replacements across moderate climates.

The furnace delivers 120,000 BTU heating output through a two-stage burner design, while the cooling side provides 42,000 BTU capacity with a scroll compressor. The 14 SEER rating sits slightly above minimum Energy Star thresholds, typically qualifying for $300-600 regional utility rebates. Operating at 73 dBA during cooling cycles keeps noise at acceptable levels. Multi-speed blower adjustment helps balance heating and cooling performance, though the single-stage compressor lacks the efficiency modulation found in higher-tier models.

Pros & Cons

Pros

Two-stage burner furnace reaches 120,000 BTU heating output for adequate capacity in moderate climates
14 SEER rating qualifies for Energy Star certification and HVAC rebates in most regions
Multi-speed blower motor adjusts airflow between 2-stage heating and single-stage cooling cycles
Scroll compressor on AC side offers quiet operation at 73 dBA in cooling mode
10-year parts warranty with online registration provides reasonable coverage for mid-tier equipment

Cons

80% AFUE efficiency is baseline for modern furnaces, meaning higher gas bills than 90%+ models over 15 years
Single-stage cooling compressor cycles on/off rather than modulating, reducing comfort and efficiency consistency
5 ton AC tonnage contradicts headline 3.5 ton rating, creating specification confusion and potential oversizing issues

Who Should Buy

Best For

Homeowners in regions with moderate heating demand who need a complete system replacement and can qualify for utility rebates. This setup makes sense for those with tight installation budgets who accept slightly higher operating costs in exchange for lower upfront investment.

Consider Alternatives If

Anyone in high-heating climates, homes with poor insulation requiring maximum efficiency, or buyers planning to stay 20+ years should invest in 90%+ AFUE furnaces and variable-capacity AC units instead.

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

Buy at HVACDirect →

Installation

Installation requires a 35-amp maximum electrical breaker and standard 120V single-phase power. Suction lines need 1/2-inch insulation thickness with 50-foot maximum length included in specs. Metal exhaust flue venting is mandatory for the furnace section. A-coil configuration supports both upflow and downflow mounting, offering flexibility in equipment room layouts. Sweat valve connections and standard refrigerant ports ensure compatibility with most existing line sets.

Warranty & Reliability

Online registration unlocks a 10-year parts coverage period covering manufacturing defects. This standard industry offering protects against compressor failure, heat exchanger cracks, and component malfunctions during that window. Coverage excludes labor costs and refrigerant charges, so repair bills typically run $200-600 after parts warranty kicks in. Documentation requirements vary by distributor.

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	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

Why does the spec sheet list both 3.5 ton and 5 ton ratings? +

The 3.5 ton headline reflects cooling capacity calculation, while 5 ton appears as a secondary tonnage classification. This discrepancy suggests potential oversizing. Clarify with your installer whether actual system matches your home's load calculation before purchase.

Can this system work with existing R22 refrigerant lines? +

Specs indicate R410A or R22 compatibility, but R22 systems require licensed EPA handling and recovery. New installations mandate R410A use. Converting older R22 systems involves significant labor costs and often justifies complete system replacement anyway.

How much will operating costs differ from a 95% AFUE furnace? +

At 80% AFUE, roughly 20% of heating fuel becomes waste heat up the chimney. Upgrading to 95% AFUE saves approximately $200-400 annually depending on local gas rates and climate. Over 15 years, that difference easily exceeds the $500-800 price premium of high-efficiency units.

Should I choose this over Rheem or Carrier equivalents at similar price points? +

Goodman offers identical component quality to parent company Daikin's higher-priced brands. The primary differences are warranty length and contractor support networks. Carrier and Rheem typically cost 15-25% more for equivalent efficiency ratings.

Does the 10-year warranty cover labor if my compressor fails? +

No. The warranty covers parts only. Compressor replacement labor typically costs $500-1,200 depending on your region and installer rates, adding significant expense beyond the parts warranty benefit.

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