3.5 Ton 15 SEER Goodman Air Conditioner with Vertical 24.5" Cased Coil Review 2026

// Bottom Line

This 3.5 ton cased coil excels for contractors building efficient split systems in moderate climates where single-stage operation suffices. It's best paired with a matching condenser unit and works well for homeowners upgrading from older 13-14 SEER systems who want meaningful efficiency gains without variable-speed complexity.

Review

This vertical cased A-coil from Online Supply represents Goodman's mainstream cooling approach, designed as an indoor component in split-system air conditioning installations. It's positioned for contractors and homeowners seeking Energy Star certified equipment without premium pricing. The unit handles both upflow and downflow configurations, making it adaptable to most residential furnace arrangements. However, a critical spec discrepancy between the product title claiming 3.5 tons and the specification sheet listing 5 tons requires clarification before purchase decisions.

Performance metrics show a 16 SEER1 efficiency rating paired with 42,000 BTU cooling capacity, representing a solid step up from baseline 13-14 SEER equipment. The scroll compressor operates as single-stage, meaning it runs full capacity or shuts off without intermediate speeds. This approach trades variable efficiency for mechanical simplicity and reliability. Operating at 73 dB puts it in the moderate noise range. Electrical requirements are modest at 208/230V single phase with a 23.5 to 40-amp breaker window, simplifying installation for most residential circuits.

Pros & Cons

Pros

Energy Star certified with 16 SEER1 efficiency rating, delivering superior cooling-per-watt compared to minimum standards
42,000 BTU output matches standard 3.5 ton specifications, though unit labeled as 5 ton, requiring verification before purchase
Vertical A-coil design in compact 24.5-inch width fits most standard furnace cabinets in upflow or downflow applications
Scroll compressor with single-stage operation provides reliable, field-proven cooling without complex controls
10-year warranty with online registration offers solid peace-of-mind protection for residential installations

Cons

Significant spec discrepancy: product title claims 3.5 ton but specs list 5 ton tonnage, creating serious confusion about actual capacity
Single-stage compressor runs at full capacity or off, less efficient than two-stage or variable-speed alternatives during moderate weather
73 dB noise level is moderately loud for a coil component, higher than premium competitors

Who Should Buy

Best For

Contractors and DIY builders constructing split systems for homes in moderate climates wanting reliable, efficient cooling without premium pricing. Homeowners replacing 10-20 year old AC systems who value straightforward single-stage operation and want measurable efficiency improvements.

Consider Alternatives If

Anyone needing ultra-quiet operation, variable-stage efficiency for extreme climates, or buyers confused by tonnage specifications should verify exact capacity requirements with manufacturer before purchasing.

3.5 Ton 15 SEER Goodman Air Conditioner with Verti

Buy at HVACDirect →

Installation

Installation requires proper refrigerant line sizing using the specified 3/8-inch liquid line and 7/8-inch suction line with 3/4-inch insulation thickness on the 50-foot suction line provided. Connection to matching Goodman condenser units is straightforward due to standard valve sizes. Upflow or downflow positioning depends on furnace cabinet orientation. A licensed HVAC technician should handle refrigerant charging and system commissioning to ensure warranty validity.

Warranty & Reliability

Coverage extends 10 years on parts and sealed components when registered online with the manufacturer. Registration is mandatory to activate full warranty protection. Coverage includes the evaporator coil per Goodman's specific coil warranty terms. Labor costs and Freon are typically excluded. This warranty is competitive for mid-tier equipment and provides meaningful protection against manufacturing defects during the system's peak usage years.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	42,000
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
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.5 amps
Tonnage	5 Ton
Height	30"
Width	24.5"
Depth	21"
Resources	CAPT Installation Manual CAPT 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.
Configuration	Upflow / Downflow
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Does this unit really deliver 3.5 tons or 5 tons of cooling capacity? +

The product title claims 3.5 tons, but the official specs list 5 ton tonnage with 42,000 BTU output. This discrepancy is concerning and requires direct manufacturer clarification before purchase. Contact Goodman or Online Supply to confirm actual capacity for your system design requirements.

Can I install this coil with any brand air conditioner condenser? +

No. This coil is designed for Goodman systems. Using it with competitor equipment voids warranties and risks refrigerant incompatibility. Verify the condenser unit matches this coil's tonnage rating, refrigerant type (R410A), and valve configurations before installation.

How does 16 SEER1 compare to newer efficiency standards? +

16 SEER1 is solid mid-tier efficiency, roughly equivalent to 15 SEER2 under newer testing standards. It beats baseline 13-14 SEER systems by 15-25 percent, delivering meaningful utility savings. Premium variable-speed units reach 18-21+ SEER2, but cost significantly more.

Should I choose this single-stage coil or a two-stage alternative? +

Single-stage suits moderate climates with consistent cooling demands. Two-stage costs more but runs at reduced capacity during mild weather, saving energy. Choose single-stage for simplicity and lower upfront cost; choose two-stage if your region has 40+ days of partial-load weather annually.

What does the 10-year warranty actually cover? +

The warranty covers manufacturing defects in components and sealed systems when registered online. It typically excludes labor, refrigerant, and damage from improper installation. Review Goodman's complete terms for specific exclusions and claim procedures.

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