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

// Bottom Line

This Goodman evaporator coil is ideal for contractors upgrading existing systems or homeowners replacing worn cooling components in space-constrained installations. The 16 SEER1 rating and Energy Star certification deliver solid efficiency gains, while the compact 21-inch width fits standard return air plenums without major ductwork modifications.

Review

This Goodman vertical cased coil represents a practical mid-tier evaporator option for contractors managing retrofit projects and system replacements. Positioned between budget stripped-down models and premium variable-capacity units, it delivers genuine efficiency improvements without requiring complete system redesigns. The 21-inch width and A-coil configuration integrate seamlessly into existing furnace cabinets, making it a smart choice for space-constrained basements and utility closets.

Performance metrics reveal solid engineering choices. The 16 SEER1 rating and Energy Star designation translate to measurable cooling cost reductions, with 34,800 BTU capacity handling typical 3-ton loads effectively. The scroll compressor operates at 73.5 dB, noticeably quieter than comparable reciprocating units. Single-stage design means constant on-off cycling rather than graduated output, which suits stable climates better than regions with wide temperature swings. Refrigerant flexibility supporting both R410A and R22 eases transition planning for mixed-system facilities.

Pros & Cons

Pros

16 SEER1 efficiency rating achieves Energy Star certification for lower operating costs and potential rebates
Compact 21-inch width fits standard upflow and downflow configurations in tight spaces
Scroll compressor design runs quieter at 73.5 dB compared to reciprocating alternatives
10-year warranty with online registration provides substantial coverage for residential applications
Flexible refrigerant compatibility supports both R410A and R22 systems during transition periods
Pre-insulated 3/8-inch suction line with insulation thickness simplifies jobsite installation

Cons

Single-stage compressor cannot modulate capacity, resulting in less precise temperature control than two-stage units
73.5 dB noise level is noticeable during operation, particularly in quiet home environments
SKU LS38783830 spec sheet shows tonnage listing discrepancy between 3-ton title and 5-ton spec that needs clarification before ordering

Who Should Buy

Best For

Contractors replacing evaporator coils in existing Goodman or compatible systems will appreciate the straightforward installation and Energy Star efficiency. Homeowners in moderate climates seeking reliable, affordable cooling upgrades without major system overhauls will see solid ROI from the 16 SEER1 performance.

Consider Alternatives If

Those prioritizing whisper-quiet operation or advanced modulating capacity should explore dual-stage compressor alternatives, as the single-stage design limits efficiency gains in variable load conditions.

3 Ton 15 SEER Goodman Air Conditioner with Vertica

Buy at HVACDirect →

Installation

Installation complexity ranks moderate. The unit accepts 208/230V single-phase 60Hz power with a 30-amp breaker maximum and 18.7-amp minimum requirement, fitting standard residential panels without upgrades. Pre-insulated 3/8-inch liquid and 7/8-inch suction lines arrive ready for connection. Technicians should verify existing ductwork compatibility and refrigerant charge requirements before startup. The 30-pound weight requires two-person handling in tight spaces.

Warranty & Reliability

Goodman's 10-year parts and labor warranty activates upon online registration, providing substantial protection for residential cooling systems. Coverage includes compressor, coil, and component failures under normal operating conditions. This surpasses industry-standard 5-year coverage and reflects confidence in scroll compressor reliability. Warranty claims require proof of professional installation, so document contractor credentials at purchase.

Specifications

SKU	LS38783830
Brand/Manufacturer	Online Supply
Cooling BTU	34,800
Refrigerant	R410A or R22
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73.5
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	30 amps
Min. Breaker Size	18.7 amps
Tonnage	5 Ton
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF 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	3/8"
Length	30 feet

Frequently Asked Questions

Does this coil work with my existing Goodman condensing unit? +

Compatibility depends on refrigerant type and system age. The R410A/R22 dual-rating helps, but you must verify tonnage matching (confirm whether this is truly 3-ton or 5-ton per the spec discrepancy) and existing line sizes against the 3/8-inch liquid and 7/8-inch suction specs. Consult your HVAC contractor before purchasing.

What electrical work is required for installation? +

The unit requires 208/230V single-phase 60Hz service with minimum 18.7-amp and maximum 30-amp breaker sizing. Most residential panels accommodate this without upgrades. Your licensed electrician should verify existing panel capacity and install appropriate breaker protection before the HVAC technician energizes the compressor.

How much will this coil reduce my cooling costs? +

The 16 SEER1 rating typically reduces energy consumption by 15 to 25 percent compared to older 10 to 12 SEER units, translating to $300 to $600 annual savings depending on climate and usage. Energy Star certification qualifies for utility rebates in many regions, offsetting initial equipment costs significantly.

Is this coil quieter than my current system? +

At 73.5 dB, this scroll compressor operates noticeably quieter than reciprocating designs, roughly equivalent to a vacuum cleaner. However, it's not silent. Single-stage operation means continuous cycling at full capacity, which may sound steady during peak cooling periods compared to variable-speed alternatives.

What does the 10-year warranty actually cover? +

Goodman covers compressor, coil, and internal components against manufacturing defects for 10 years with registration. Labor coverage typically applies during year one only. Review the formal warranty document to confirm coverage limits and claim procedures, as restrictions may apply to commercial or rental properties.

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