3.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This Goodman combo system works best for homeowners replacing older equipment in moderate climates who value straightforward performance over cutting-edge efficiency. The 14 SEER cooling and 80% AFUE heating deliver legitimate savings without premium pricing, making it a practical choice for budget-conscious contractors and DIY installers.

Review

Goodman's 3.5 ton upflow system represents the practical middle ground in residential HVAC. Priced competitively, this unit pairs an 80,000 BTU gas furnace with a matching 42,000 BTU air conditioner, sized correctly for homes around 1,500-1,800 square feet in moderate climates. The upflow A-coil configuration suits basements and utility closets, making retrofit installations relatively straightforward. Online Supply markets this SKU LS38783830 as a budget-conscious contractor choice without compromising on essential performance specifications.

The cooling side delivers 14 SEER efficiency using a scroll compressor and R410A or R22 refrigerant, translating to roughly 20-25% better efficiency than decade-old units. The heating half rates 80% AFUE with two-stage burners, meaning 80 cents of heat reaches your home per dollar of gas burned. A high-efficiency multi-speed blower maxes out at 2,000 CFM, allowing staged operation that reduces runtime cycles and improves comfort. At 73 dB, noise levels stay acceptable for residential placement.

Pros & Cons

Pros

14 SEER rating meets modern efficiency standards with 42,000 BTU cooling capacity for proper 3.5-ton sizing
80% AFUE furnace with two-stage burners and high-efficiency multi-speed blower motor, capable of 2,000 CFM maximum airflow
Scroll compressor design offers proven reliability and quieter operation at 73 dB, typical for single-stage units
Flexible refrigerant compatibility supporting both R410A and R22, useful during system transitions
10-year warranty with online registration provides solid peace of mind protection

Cons

Single-stage compressor means less precise temperature control and higher cycling compared to two-stage models
No ENERGY STAR certification limits rebate eligibility in some regions
80% AFUE is adequate but trails high-efficiency furnaces reaching 95%+ AFUE, costing more in fuel over time

Who Should Buy

Best For

Homeowners in regions with moderate heating and cooling demands who need a balanced, no-frills system replacement. Contractors working on service calls or new construction where clients prefer proven technology over premium pricing will appreciate the straightforward engineering.

Consider Alternatives If

Buyers seeking ENERGY STAR certification, those in extreme climates requiring two-stage compressors, or customers planning 20-year ownership who benefit from ultra-high-efficiency models.

3.5 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Fu

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Installation

This upflow system requires metal exhaust flue, standard 120V single-phase 60Hz power with 22-35 amp breaker capacity, and typical refrigerant line sizing of 3/8 inch liquid and 7/8 inch suction with 3/8 inch insulation. The unit weighs 30 pounds, dimensions are 30 by 21 by 21 inches, and it ships with 30-foot refrigerant line packages. Standard ductwork connections and electrical rough-in present no unusual challenges for licensed installers.

Warranty & Reliability

The 10-year parts warranty, activated through online registration, covers compressor and major components. This timeframe aligns with industry standards for mid-tier equipment. Registration is straightforward but required, so save documentation immediately after installation. The evaporator coil carries separate warranty coverage under Goodman terms. Labor costs and refrigerant charges fall outside coverage.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	14
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 amps
Tonnage	5 Ton
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	High Efficiency Multi-Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

Does this system qualify for energy rebates? +

No ENERGY STAR certification means federal tax credits don't apply here. However, some utility companies offer rebates for 14 SEER cooling or 80% AFUE heating independently. Contact your local power provider to confirm eligibility. Regional efficiency programs vary widely, so verification before purchase prevents disappointment.

Can I install this myself if I'm not HVAC certified? +

Absolutely not. EPA Section 608 certification is legally required for refrigerant handling in all 50 states. Hire a licensed contractor for installation to ensure proper charging, evacuation, and electrical connection. DIY attempts void warranties and risk system damage, plus potential federal fines for refrigerant violations.

How does 14 SEER compare to newer systems? +

14 SEER meets current minimum standards but ranks behind premium 16-18 SEER models. For a 3.5-ton system, expect annual cooling energy costs roughly $100-150 higher than 16 SEER equivalents, depending on climate. The tradeoff is lower upfront cost, ideal for budget-conscious replacements or rental properties.

What's the difference between this and a high-efficiency two-stage model? +

Two-stage compressors modulate capacity for better temperature precision and lower operating noise, reducing monthly utility costs by 5-10%. This single-stage unit cycles on-off more frequently, consuming slightly more energy. Two-stage systems cost $1,500-2,500 more installed, so true savings depend on climate severity and usage patterns.

Is the 10-year warranty transferable if I sell my home? +

Most manufacturers, including Goodman, require the original owner for warranty coverage. Check your registration documents, as some policies allow limited coverage transfer to new homeowners with proof of installation. Contact Goodman directly after purchase to clarify terms for your specific unit.

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