3.5 Ton 14 SEER 92% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 3.5-ton system is best for homeowners upgrading from older equipment who want respectable efficiency without premium pricing. The 92% AFUE furnace and 14 SEER air conditioner deliver balanced heating and cooling for moderate climates, backed by Goodman's reputation for durability.

Review

The Goodman 3.5-ton upflow gas furnace and air conditioner system sits firmly in the accessible mid-market segment. This unit combines a 100,000 BTU furnace with 42,000 BTU cooling capacity in one package, marketed toward homeowners replacing older split systems. Goodman's reputation for straightforward, maintainable equipment makes this attractive to both DIY-inclined owners and contractors balancing cost with dependability. The upflow configuration suits typical basement or utility closet installations across most U.S. homes.

Performance numbers tell a practical story. The 92% AFUE furnace rating beats standard 80% models by 12 percentage points, meaning real savings on winter heating bills. On the cooling side, 14 SEER delivers moderate efficiency, matching systems from five years ago. The multi-speed blower motor adjusts to heating and cooling loads, improving comfort over fixed-speed alternatives. At 73 decibels, outdoor noise falls in the average range for single-stage compressors. Electrical demands are manageable at 22 to 35-amp breaker sizing.

Pros & Cons

Pros

92% AFUE furnace efficiency reduces heating costs compared to 80% baseline units
14 SEER cooling rating qualifies for mid-tier incentives in many states
Multi-speed blower motor allows variable airflow for comfort and efficiency
Plastic PVC exhaust compatible with modern homes, no masonry vent required
10-year warranty with online registration provides solid long-term peace of mind
Single-stage burner and scroll compressor are proven, low-maintenance designs

Cons

Not ENERGY STAR certified, so misses the highest efficiency tier and federal tax credits
73 dB noise level is moderately loud for some applications, especially night operation
5-ton capacity listed in specs creates confusion with 3.5-ton system claim that needs clarification

Who Should Buy

Best For

Homeowners in moderate climates replacing 15+ year old systems who value reliability and modest efficiency gains without paying top-tier prices. Contractors installing in rental properties or secondary homes where mid-range performance meets budget constraints.

Consider Alternatives If

Anyone in ENERGY STAR incentive programs, high-heat zones needing larger capacity, or those seeking cutting-edge efficiency should explore 16+ SEER units or variable-speed models.

3.5 Ton 14 SEER 92% AFUE 100,000 BTU Goodman Gas F

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Installation

Installation is straightforward for licensed HVAC technicians. The unit accepts standard 3/8-inch liquid lines and 7/8-inch suction lines with 3/8-inch insulation thickness. PVC exhaust simplifies venting compared to masonry chimneys, and the right-side flue location offers flexibility. Upflow design requires adequate vertical clearance, typically 30 inches minimum height. Electrical connection is 208/230V single-phase 60Hz standard utility power. Most installations run 4-6 hours for experienced crews.

Warranty & Reliability

The 10-year parts warranty requires online registration, standard for Goodman units. This covers manufacturer defects in compressor, heat exchanger, and components but excludes wear items like capacitors and refrigerant. Registration takes five minutes and activates coverage immediately. For homeowners keeping systems 10+ years, this warranty provides meaningful protection against catastrophic failures during the critical early years.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
Heating BTU	100,000
Refrigerant	R410A
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	Plastic / PVC
Furnace Efficiency / AFUE	92%
Blower Motor	Multi Speed
Maximum CFM	2000
Configuration	Upflow / Downflow
Flue Location	Right
Burner Stages	Single
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

Why does the spec sheet list 5-ton capacity when this is marketed as 3.5-ton? +

The tonnage specification in the data appears to be a data entry error. The actual system cooling capacity is 42,000 BTU, which equals 3.5 tons. Verify the correct tonnage with the seller before purchase to ensure proper sizing for your home.

Can I install this system myself if I'm handy? +

Federal law requires EPA certification for anyone handling refrigerant, so the AC portion requires a licensed technician. The furnace gas connections also require licensed work in most states. Professional installation ensures safety, warranty validity, and proper system performance.

How does 14 SEER compare to newer air conditioners? +

14 SEER meets minimum federal standards and runs 2-3 SEER points behind current high-efficiency units. For moderate climates, the difference in monthly bills is roughly 15-20% higher than 16-18 SEER systems, but upfront cost is substantially lower.

Is this system better than a 16 SEER Carrier or Lennox at the same price point? +

At true equivalent pricing, 16+ SEER units from name brands typically offer better long-term savings and quieter operation. However, Goodman systems have lower service costs and parts availability. Choose based on climate, run-time hours, and planned ownership length.

What does the 10-year warranty actually cover? +

It covers defects in compressor, heat exchanger, and sealed components. Refrigerant, labor, and wear items are excluded. Registration is required. Most failures occur within the first 5 years anyway, so this provides solid protection.

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