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

// Bottom Line

This 4-ton system delivers dependable heating and cooling for homes in moderate climates seeking straightforward efficiency without premium pricing. The 14 SEER rating and 80% AFUE furnace provide solid energy performance for contractors and homeowners willing to prioritize value over cutting-edge technology.

Review

The Goodman 4-ton gas furnace and air conditioner system represents a practical middle ground in the HVAC market. This upflow A-Coil configuration delivers 48,000 BTU cooling capacity and 100,000 BTU heating output, making it appropriate for residential homes in the 1,500 to 2,500 square foot range. Goodman's reputation for reliability without premium pricing makes this SKU LS38783830 attractive to cost-conscious contractors and homeowners alike.

Performance metrics reflect solid mid-tier specifications. The 14 SEER rating on the cooling side means reasonable air conditioning efficiency, with 48,000 BTU cooling capacity handled by a single-stage scroll compressor. On heating, the 80% AFUE furnace achieves 100,000 BTU output but loses 20% of fuel energy through the metal flue. The multi-speed PSC blower can deliver up to 2,000 CFM, though single-stage operation means less precise capacity modulation than variable-speed units.

Pros & Cons

Pros

14 SEER cooling efficiency provides good energy savings for standard residential applications
80% AFUE furnace heats 100,000 BTU output, suitable for most single-family homes up to 2,000 sq ft
Single-stage scroll compressor is proven reliable architecture with lower service costs
Multi-speed PSC blower motor allows flexibility in airflow control from 0 to 2,000 CFM
10-year warranty with online registration provides solid coverage and manufacturer backing
A-Coil configuration in upflow orientation fits standard attic or basement installations

Cons

Single-stage compressor cycles on and off rather than modulating, reducing efficiency compared to variable-speed models
74 decibel noise level is audible from living spaces during operation, higher than quieter premium units
No Energy Star certification indicates this model doesn't meet EPA's top efficiency thresholds
80% AFUE furnace is at minimum efficiency standard, meaning 20% heating energy is lost up the flue
Spec sheet shows tonnage conflict: header states 4-ton capacity but specs list 5-ton, creating confusion

Who Should Buy

Best For

Homeowners and contractors in moderate climate zones needing straightforward replacement systems with good balance between upfront cost and operating expenses. This unit works well for homes between 1,500 and 2,000 square feet where heating demands are moderate and premium efficiency upgrades aren't justified.

Consider Alternatives If

Energy-conscious buyers in cold climates should look for higher AFUE ratings (90%+ efficiency), and homeowners prioritizing quiet operation should consider variable-speed compressor models that run at 68-70 decibels.

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

Buy at HVACDirect →

Installation

Installation requires 120V single-phase 60Hz power with a 26.4 to 45-amp breaker, standard residential electrical service. The upflow A-Coil design fits attic, basement, or utility closet spaces measuring at least 34.5 inches tall by 21 inches wide by 28.75 inches deep. Refrigerant line sizing uses 3/8-inch liquid and 7/8-inch suction with 30-foot max suction line length and 3/8-inch insulation.

Warranty & Reliability

Goodman provides a 10-year parts and labor warranty when you register the unit online. This comprehensive coverage protects against compressor failure, coil leaks, and component defects for a full decade. Registration is required to activate the warranty, so documentation and proof of purchase are essential for homeowners.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	48,000
Heating BTU	100,000
Refrigerant	R410A or R22
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 Manual Goodman Parts Manual Goodman Service Manual Goodman Specifications Goodman Technical Information Goodman User Information 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	Multi Speed - PSC
Maximum CFM	2000
Flue Location	Top
Burner Stages	Single
Fuel Type	Gas
Suction Line Insulation Thickness	3/8"
Length	30 feet

Frequently Asked Questions

Is this system compatible with my existing ductwork rated for 4 tons? +

Yes, despite the spec sheet listing 5-ton tonnage, this unit delivers 4-ton capacity. The 2,000 CFM maximum airflow and 48,000 BTU cooling align with 4-ton ductwork. However, verify your ductwork is sized for approximately 400 CFM per ton to avoid restrictions.

What refrigerant does this unit use, and does that matter for me? +

The system accepts either R410A or R22 refrigerant depending on your specific model variant. R410A is standard in newer units and is safer and more efficient. Confirm with your installer which refrigerant charge is included before installation to ensure proper servicing.

How much will this unit cost to operate annually compared to a 16 SEER system? +

The 14 SEER rating costs approximately 12-15% more to run annually than a 16 SEER unit in moderate climates. On a $1,000 annual cooling bill, expect $120-150 additional cost. The furnace's 80% AFUE means you'll pay more per BTU than 95% AFUE models during heating season.

How does single-stage operation affect comfort and efficiency compared to variable-speed compressors? +

Single-stage compressors run full-capacity or off, creating temperature swings and cycling losses. Variable-speed units modulate output, maintaining steadier comfort and operating 10-20% more efficiently. You'll notice more thermostat fluctuations with this single-stage design, especially on mild days.

Is the 10-year warranty enough, and what does it actually cover? +

Ten years is standard for Goodman products. The warranty covers parts and labor for defects but typically excludes damage from improper installation, lack of maintenance, or refrigerant leaks caused by user neglect. Register promptly to activate coverage.

Affiliate disclosure: IndustrialRank earns a commission on qualifying purchases at no extra cost to you. We only recommend products we have independently reviewed.