3.5 Ton 15 SEER Goodman Air Conditioner with Vertical 21" Cased Coil Review 2026

// Bottom Line

This Goodman evaporator coil suits contractors upgrading existing 5-ton systems or installing split configurations where a vertical A-coil fits the layout constraints. The 16 SEER rating with R410A refrigerant delivers solid efficiency gains, particularly in moderate to hot climates.

Review

Goodman's vertical cased evaporator coil represents a solid mid-range choice for residential HVAC retrofits and new system builds. Manufactured by Online Supply under the Goodman brand, this unit targets contractors seeking reliable performance without enterprise-level complexity. The 5-ton rating with 42,000 BTU capacity positions it for standard single-family homes averaging 2,000 to 2,500 square feet in temperate climates.

The 16 SEER1 efficiency rating outperforms baseline 13 SEER minimum standards, translating to approximately 20 percent lower cooling costs versus older systems. This unit uses R410A refrigerant with a scroll compressor delivering 42,000 BTU cooling output at single-stage operation. The 73 dB noise level remains acceptable for residential settings, though users near the indoor unit may notice compressor cycling during peak summer operation.

Pros & Cons

Pros

16 SEER1 rating exceeds baseline efficiency requirements and qualifies for Energy Star
42,000 BTU capacity handles full 5-ton cooling load without staging limitations
Vertical 21-inch cased coil design fits tight mechanical closets and upflow/downflow applications
Scroll compressor known for quiet operation at 73 dB and durability in residential systems
10-year warranty with online registration covers manufacturing defects comprehensively

Cons

Single-stage compressor cannot modulate capacity, leading to higher operating costs than two-stage alternatives
73 dB noise level approaches upper threshold for indoor installations near living spaces
Limited technical support through Online Supply compared to major HVAC distributors

Who Should Buy

Best For

Contractors performing equipment upgrades on existing 5-ton systems appreciate the straightforward compatibility. Homeowners in regions with consistent cooling demands benefit from the Energy Star efficiency without premium pricing.

Consider Alternatives If

Buyers needing variable-capacity cooling or those installing in noise-sensitive zones should evaluate two-stage compressor options instead.

3.5 Ton 15 SEER Goodman Air Conditioner with Verti

Buy at HVACDirect →

Installation

Installation requires standard 208/230V single-phase 60Hz electrical service with breaker capacity between 23.5 and 40 amps. The vertical 21-inch width and 30-inch height fit confined spaces common in upflow basement installations or downflow attic applications. Technicians must size suction and liquid lines to 7/8 inch and 3/8 inch respectively, with 3/4-inch insulation on the suction line over 50-foot maximum line set.

Warranty & Reliability

Goodman backs this coil with a 10-year comprehensive warranty activated through online registration. Coverage includes defects in materials and workmanship but excludes damage from improper installation, refrigerant contamination, or system mismatch. Registration typically takes minutes and provides manufacturer direct support for claim processing.

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	21"
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

What does 16 SEER1 mean for my cooling bills? +

SEER1 measures seasonal efficiency across varying temperatures. A 16 SEER unit typically reduces cooling costs 20-25 percent versus 13 SEER baseline models. Actual savings depend on your climate, thermostat settings, and ductwork condition. Hot climates see greater annual savings than mild regions.

Can this coil work with my existing 5-ton condenser unit? +

Yes, as long as your current condenser uses R410A refrigerant and operates at single-stage compression. Verify refrigerant type on the condenser nameplate before ordering. Mixing R410A and older refrigerants like R22 causes system failure. Consult your HVAC contractor if unsure about compatibility.

Why does the spec sheet list both 3.5 ton and 5 ton? +

The product title references 3.5 tons as nominal rating, while specs show 5-ton capacity at 42,000 BTU. This discrepancy suggests the coil handles larger systems. Verify your actual tonnage requirement and contact Online Supply before purchasing to confirm proper sizing.

How does single-stage compare to two-stage compressors? +

Single-stage runs at full capacity or off, cycling frequently in mild weather and wasting energy. Two-stage compressors reduce capacity during partial-load periods, improving efficiency 10-15 percent. Single-stage costs less upfront but costs more to operate annually in variable-temperature regions.

What happens if I don't register the warranty? +

Goodman's policy typically enforces online registration to activate the 10-year coverage period. Without registration, you lose manufacturer support and claim eligibility. Register immediately after installation to avoid coverage gaps and preserve your investment protection.

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