3.5 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 3.5 ton Goodman system delivers 14 SEER cooling and 80% AFUE heating at an attractive price point, making it ideal for replacement jobs where budget constraints matter. It's a workhorse choice for contractors managing multiple residential installs without premium pricing.

Review

The Goodman 3.5 ton gas furnace and air conditioner system represents the practical middle ground in residential HVAC. This upflow configuration handles 100,000 BTU heating and 42,000 BTU cooling, making it suitable for homes in the 1,500 to 2,000 square foot range. Goodman's reputation for straightforward reliability and affordability makes this system popular with contractors managing multiple residential installations where budget remains a primary concern.

Performance metrics show a 14 SEER cooling rating and 80% AFUE heating efficiency, both solid figures without reaching premium tiers. The high efficiency multi-speed blower motor runs at up to 2,000 CFM maximum, allowing flexible airflow matching across load conditions. Two-stage burner operation on the heating side reduces cycling compared to single-stage units, improving comfort and reducing wear, though the 73 dB noise level may be noticeable in quieter homes during operation.

Pros & Cons

Pros

High efficiency multi-speed blower motor reduces runtime costs by optimizing airflow delivery
14 SEER rating provides solid cooling efficiency for 3.5 ton capacity, 42,000 BTU output
Dual-stage burner allows flexible heating with two-stage operation for better modulation
Two-stage operation improves comfort by reducing temperature swings and short cycling
10-year warranty with online registration protects against major compressor and parts failures

Cons

80% AFUE is baseline efficiency, not high efficiency, meaning higher heating costs than 95% AFUE units
73 dB noise level registers as loud for residential settings, especially during heating cycles
Single-stage condenser limits part-load efficiency during mild weather operation

Who Should Buy

Best For

Contractors installing replacement systems in existing homes where ductwork and electrical service are already adequate. Homeowners in moderate climates seeking reliable equipment without premium pricing or advanced efficiency features.

Consider Alternatives If

Anyone prioritizing maximum energy savings should consider 95% AFUE furnaces or those seeking ENERGY STAR certification should look elsewhere.

3.5 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas F

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Installation

Installation requires standard 208/230V single-phase 60 Hz service with breaker sizing between 22 and 35 amps, fitting most residential electrical panels. The upflow configuration and compact 30 by 21 by 21 inch dimensions ease placement in attics, basements, or utility closets. Metal flue exhaust venting and refrigerant line sets with 3/8 inch suction insulation follow conventional requirements, keeping labor straightforward for experienced HVAC technicians.

Warranty & Reliability

The 10-year parts and compressor warranty with online registration provides solid protection against failure, though registration is required to activate full coverage. Coverage includes the evaporator coil under the Goodman extended warranty. This duration is standard for mid-tier equipment and reflects Goodman's confidence in scroll compressor and component durability under normal operating conditions.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
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)	73
Weight (in lbs)	30.000000
Feature	Spec
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
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	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
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 14 SEER compare to newer systems? +

14 SEER is respectable but not cutting edge. Current mid-tier units reach 16-18 SEER. This system delivers solid cooling at lower initial cost. For homeowners prioritizing lower monthly bills over five years, newer high-efficiency units may offer better ROI through energy savings despite higher upfront cost.

Can this handle extreme heat climates? +

The 42,000 BTU cooling capacity and single-stage compressor work adequately for moderate climates. In extreme heat regions above 100°F regularly, a two-stage or variable capacity condenser would better handle sustained cooling demands and maintain efficiency. Consider regional climate data before specifying for hot zones.

What makes the two-stage burner beneficial? +

Two-stage burners run at reduced output during mild weather, cycling less frequently. This reduces temperature swings, improves comfort, and decreases startup wear on components. Single-stage burners run full blast immediately, causing more obvious heating cycling and reduced comfort in homes with good insulation.

Is R410A refrigerant better than R22? +

R410A is the modern standard with higher pressure ratings and better efficiency properties. R22 is legacy refrigerant being phased out. This unit accepts either, but R410A is recommended for new installations due to better performance, availability, and environmental compliance in most regions.

Do I need to register for the warranty? +

Yes. The 10-year warranty requires online registration with Goodman to activate full coverage. Unregistered units typically receive shorter warranties. Ensure customers register immediately after installation to protect their investment and avoid coverage disputes later.

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