4 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Furnace and Air Conditioner System - Upflow Review 2026

// Bottom Line

This 4-ton Goodman system delivers strong heating and cooling efficiency for homeowners seeking balanced performance without premium pricing. Best suited for residential applications where both heating and cooling matter equally, particularly in mixed climates where the 96% AFUE furnace and 14 SEER air conditioner justify the investment.

Review

The Goodman 4-ton gas furnace and air conditioner system represents the practical middle ground in residential HVAC. This upflow configuration handles both heating and cooling in one integrated package, appealing to contractors who need straightforward, proven equipment for replacement jobs. Goodman's reputation centers on reliability over innovation, making this system a solid choice for homeowners who value dependability and affordable service options in established markets.

Performance specs show capable equipment across both functions. The furnace delivers 100,000 BTU at 96% AFUE, meaning 96 cents of every dollar spent on gas becomes usable heat. The air conditioner pulls 48,000 BTU with 14 SEER efficiency, moderate by today's standards but respectable for the price point. The scroll compressor runs single-stage, meaning it delivers full capacity immediately rather than ramping up gradually. The multi-speed blower motor at 2,000 CFM maximum provides flexibility for different duct configurations.

Pros & Cons

Pros

96% AFUE furnace efficiency means lower heating bills and minimal wasted fuel during winter operation
14 SEER cooling efficiency provides mid-range performance in an affordable package
Single-stage scroll compressor is proven reliable with straightforward maintenance and repair
Multi-speed blower motor improves comfort by reducing temperature swings and loud cycling
PVC/plastic exhaust flue reduces installation cost compared to metal vent requirements

Cons

Single-stage compressor cannot modulate capacity, resulting in less precise temperature control than variable-speed units
74 dB operating sound level is audible in living spaces, particularly during air conditioning
No ENERGY STAR certification, missing potential rebates or utility incentives available in some regions

Who Should Buy

Best For

Homeowners upgrading aging furnace and AC systems who prioritize reliability and efficiency balance over premium features. Contractors installing standardized equipment in moderate-climate regions where a workhorse mid-tier system makes more economic sense than high-efficiency alternatives.

Consider Alternatives If

Buyers seeking ENERGY STAR certification, variable-capacity operation, or those sensitive to equipment noise should consider alternatives with inverter-driven compressors.

4 Ton 14 SEER 96% AFUE 100,000 BTU Goodman Gas Fur

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Installation

Installation complexity sits at moderate difficulty. The upflow configuration suits attics or basements in typical residential layouts. Suction and liquid lines measure 7/8 inches and 3/8 inches respectively, with 3/8 inch insulation thickness standard. Electrical requirements are straightforward, requiring 115V single-phase 60Hz service with breaker sizing between 26.4 and 45 amps. PVC flue exhaust simplifies venting through exterior walls compared to metal alternatives.

Warranty & Reliability

Goodman includes a 10-year warranty when you register the product online. This covers parts and labor, providing genuine protection during the system's peak performance years. Registration is essential, so preserve documentation and complete the process within required timeframes. Online Supply backs this with their own support infrastructure, though you should verify local service availability before purchase.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	48,000
Heating BTU	100,000
Refrigerant	R410A or R22
Electrical	115 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 Specifications 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	Plastic / PVC
Furnace Efficiency / AFUE	96%
Blower Motor	Multi Speed
Maximum CFM	2000
Flue Location	Right
Burner Stages	Single
Fuel Type	Gas
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

Why does this spec sheet show 4 tons and 5 tons for the same unit? +

The system tonnage references differ between heating and cooling capacity. The 4-ton cooling rating (48,000 BTU divided by 12,000 BTU per ton) is the actual cooling capacity. The 5-ton tonnage specification appears to reflect an oversized compressor arrangement. Confirm with the installer which rating applies to your ductwork sizing.

Can this system use both R410A and R22 refrigerant? +

No. The system ships charged with one refrigerant type. R410A and R22 are not interchangeable and require different fittings and oil types. Verify which refrigerant is pre-charged before purchase, as availability and regulations vary by region. R410A is standard in new residential systems.

How does 14 SEER compare to newer air conditioners? +

14 SEER represents solid mid-tier performance from approximately 2010-2015 standards. Modern systems range 16-24+ SEER depending on compressor type and quality. The 14 SEER rating costs less upfront but runs higher electric bills than variable-capacity units, offsetting savings over 15-20 year lifespan in cooling-heavy climates.

Is this better than replacing the furnace and AC separately? +

Combination systems simplify installation, use one warranty, and coordinate controls seamlessly. Separate units allow mismatched capacities and efficiencies but offer greater flexibility in brand selection. For most replacements, integrated systems like this reduce complexity and long-term service calls.

Does online registration actually matter for warranty coverage? +

Yes. Without registration, Goodman may deny warranty claims. Complete the online registration immediately after installation and keep confirmation emails. Proof of purchase receipt also supports claims if registration records fail.

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