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

// Bottom Line

This Goodman system works best for homeowners seeking a no-frills, affordable complete heating and cooling solution without premium efficiency ratings. It delivers adequate performance at a competitive price point, making it ideal for budget-conscious replacements in moderate climates.

Review

Goodman's 4 Ton 14 SEER system represents the practical middle ground in residential HVAC, balancing affordability with respectable efficiency. This complete package pairs a 48,000 BTU cooling coil with a 100,000 BTU furnace, addressing both seasonal needs in a single upflow configuration. It's positioned as a contractor-friendly option for straightforward replacements where budget constraints outweigh performance luxury.

The cooling side delivers 14 SEER performance using R410A refrigerant and a scroll compressor on a single stage, which simplifies service but limits modulation during partial load conditions. Heating reaches 100,000 BTU through a two-stage burner with 80% AFUE efficiency, adequate for moderate climates yet inferior to modern condensing furnaces hitting 95%+. The variable-speed blower motor running up to 2,000 CFM provides some efficiency recovery across seasonal cycling.

Pros & Cons

Pros

14 SEER cooling efficiency exceeds baseline standards for most U.S. regions
100,000 BTU furnace with two-stage burner provides responsive heating control
Variable-speed blower motor maximizes comfort and reduces energy waste during partial load operation
5 Ton tonnage handles larger homes while maintaining single-stage compressor reliability
10-year warranty with online registration offers solid coverage at this price tier

Cons

80% AFUE heating is outdated compared to modern 95%+ systems, costing more to operate over time
Single-stage compressor cannot modulate cooling capacity, reducing humidity control and comfort precision
Not Energy Star certified, indicating it meets only baseline efficiency requirements
74 dB noise level ranks higher than premium units, potentially noticeable in quiet environments

Who Should Buy

Best For

Homeowners replacing failed systems who need immediate, budget-friendly cooling and heating without waiting for premium financing options. This works well for properties in moderate climates where 14 SEER and 80% AFUE meet local efficiency codes.

Consider Alternatives If

Anyone prioritizing long-term energy savings or comfort precision should explore higher SEER/AFUE equipment, as the operating cost premium will exceed the purchase price difference within 7-10 years.

4 Ton 14 SEER 80% AFUE 100,000 BTU Goodman Gas Fur

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Installation

This upflow A-coil configuration requires standard ductwork connections with 3/8 inch liquid lines and 7/8 inch suction lines, both sized for straightforward field assembly. The unit needs 120V single-phase 60Hz electrical service with 26.4 to 45 amp breaker capacity. Metal exhaust flue is mandatory, and 3/8 inch suction line insulation prevents condensation issues in humid regions.

Warranty & Reliability

Goodman includes 10 years of coverage when you complete online registration after purchase. This protects against manufacturer defects but excludes labor, refrigerant, and normal maintenance. The warranty term is competitive for mid-tier equipment, though coverage duration varies by retailer, making registration critical.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	48,000
Heating BTU	100,000
Refrigerant	R410A
Electrical	120 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	74
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	45 amps
Min. Breaker Size	26.4 amps
Tonnage	5 Ton
Height	34.5"
Width	21"
Depth	28.75"
Resources	Goodman Brochure Goodman Installation Instructions Goodman Parts Manual Goodman Service Manual Goodman Technical Information Goodman User Information Goodman Warranty You will need AdobeÂ® AcrobatÂ® 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.
Configuration	Upflow/Horizontal
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Airflow Direction	Upflow/Horizontal
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Variable Speed
Maximum CFM	2000
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

How does 14 SEER compare to current efficiency standards? +

14 SEER meets or slightly exceeds 2023 federal minimums in most regions but falls below modern 16-18 SEER units. It's acceptable for code compliance but won't qualify for Energy Star incentives. Older systems typically rate 8-10 SEER, making this a worthwhile upgrade.

Is this unit suitable for upflow attic installation? +

Yes, the upflow/horizontal configuration handles attic placement properly. At 34.5 inches tall and 30 pounds, it fits standard attic spaces. Ensure adequate clearance around the unit for airflow and future service access, typically 12 inches minimum on sides.

Will single-stage cooling affect my comfort? +

Single-stage compressors run at full capacity or off with no in-between, making them less efficient at partial loads and reducing humidity removal during mild weather. Two-stage or variable-capacity systems provide finer control. You'll notice the difference most in shoulder seasons like spring and fall.

How does this furnace's 80% AFUE compare to high-efficiency models? +

80% AFUE is standard for non-condensing furnaces and means 20% of fuel energy exits through the flue unused. Condensing furnaces at 95%+ AFUE recover that heat. Over 15 years, the efficiency gap translates to thousands in operating costs, favoring premium units despite higher initial price.

What does the 10-year warranty actually cover? +

Parts defects are covered for 10 years with online registration, but labor, refrigerant, and maintenance costs fall on you. Review the full warranty document before purchase, as some retailers impose stricter conditions or limited coverage on specific components.

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