Goodman 3.5 Ton 16 SEER Central Air Conditioner Condenser - R410A Single Stage Review 2026

// Bottom Line

This Goodman condenser makes sense for homeowners and contractors seeking solid efficiency without premium pricing. It delivers Energy Star certified performance at 16 SEER for homes in the 3.5-ton cooling range, handling typical single-family residences effectively without breaking the budget.

Review

The Goodman GSX160421 positions itself as the pragmatic choice in the mid-tier condenser market. At $1988, this 3.5-ton unit targets contractors and homeowners seeking Energy Star certification without premium pricing. Goodman's established reputation for manufacturing straightforward, serviceable equipment carries weight here. The unit doesn't push technological boundaries, but it delivers on fundamentals: reliable cooling for typical single-family homes, solid efficiency ratings, and predictable performance across moderate climates.

Performance specs reflect competent, if conservative, engineering. The 42,000 BTU output addresses 3.5-ton cooling demands, while the 16 SEER rating qualifies for Energy Star programs and delivers measurable energy savings over older 10-SEER units. The scroll compressor provides mechanical reliability and durability, handling extended runtimes without excessive wear. Operating at 73 dB sits in the acceptable range for residential installations, though it trades some noise for the simplified single-stage design. Electrical requirements of 208/230V single-phase with 23.5 to 40 amp breaker compatibility fit standard residential installations.

Pros & Cons

Pros

16 SEER rating meets Energy Star standards, delivering 42,000 BTU cooling capacity with meaningful efficiency gains
Scroll compressor technology provides reliable operation and lower maintenance compared to reciprocating designs
Compact footprint of 35.5" x 35.5" x 36.25" fits standard pad installations without extensive modifications
10-year warranty with online registration provides solid coverage for parts defects
Single-stage operation simplifies wiring and reduces electrical complexity, requiring 23.5 to 40 amp breaker

Cons

73 dB noise level runs slightly louder than variable-speed competitors, which may concern noise-sensitive homeowners
Single-stage compressor cycles on and off rather than modulating, missing efficiency gains of two-stage units
R410A refrigerant requires EPA certification for service technicians, limiting DIY maintenance options

Who Should Buy

Best For

Contractors and homeowners replacing older 3.5-ton systems in moderate climates or standard-sized homes will appreciate the straightforward installation and solid efficiency-to-cost ratio. Budget-conscious buyers in areas without extreme cooling demands get reliable performance without paying for variable-speed technology they may not need.

Consider Alternatives If

Homeowners in high-heat climates, those prioritizing whisper-quiet operation, or anyone seeking maximum efficiency gains should explore variable-stage or two-stage alternatives that provide more granular cooling control.

Goodman 3.5 Ton 16 SEER Central Air Conditioner Co

$1988

Buy at HVACDirect →

Installation

Installation requires standard condenser placement on a level, reinforced pad. The 228-pound unit handles typical two-person installation. Refrigerant line connections use 3/8-inch liquid and 7/8-inch suction valves, matching most indoor coil configurations. Single-stage operation simplifies electrical wiring compared to variable-speed models. Most HVAC contractors complete installation in four to six hours when paired with compatible indoor equipment. Goodman's installation manual provides clear guidance for both experienced technicians and careful DIYers.

Warranty & Reliability

Goodman backs this condenser with a 10-year parts warranty activated through online registration. This coverage protects against compressor failure, refrigerant leaks, and component defects during the critical first decade. Labor and refrigerant charges fall outside coverage. Registration takes minutes online and proves essential for claiming warranty protection. Ten years positions this unit favorably for homeowners planning to stay in their homes long-term, though coverage ends if the system is transferred to a new owner.

Specifications

SKU	GSX160421
Brand/Manufacturer	Goodman
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)	228.000000
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	3.5 Ton
Height	36.25"
Width	35.5"
Depth	35.5"
Resources	Goodman Brochure Goodman Specifications Goodman Installation Manual Goodman Warranty Information Goodman Service Instructions Goodman Kit Instructions Goodman Parts Manual 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.

Frequently Asked Questions

Will this condenser work with my existing indoor coil and furnace? +

Compatibility depends on your indoor equipment's tonnage and refrigerant type. This 3.5-ton R410A unit pairs with matching 3.5-ton indoor coils and air handlers already charged with R410A. If replacing an older R22 system, you'll need a complete system replacement. Your HVAC contractor can confirm compatibility before purchase.

How difficult is installation compared to higher-end Goodman models? +

Installation difficulty remains unchanged from premium Goodman units since single-stage operation actually simplifies electrical connections. The main difference is the lack of variable-speed controls, which reduces wiring complexity. Standard condenser pad placement, refrigerant lines, and electrical connections follow identical procedures across Goodman's condenser line.

What energy savings should I expect versus my old 10-SEER unit? +

A 16 SEER unit uses roughly 40 percent less energy than a 10-SEER model for equivalent cooling. On a typical 3.5-ton system running 2000 hours annually, expect annual electricity savings of $200 to $400 depending on local utility rates and climate. Your cooling season hours and thermostat settings significantly impact actual savings.

How does this unit compare to variable-stage competitors at similar prices? +

This single-stage unit prioritizes simplicity and reliability over variable-stage efficiency. Variable-stage units modulate compressor speed for better part-load efficiency and quieter operation, typically costing $500 to $800 more. Choose this Goodman if straightforward operation and lower upfront cost matter more than maximum efficiency and quietness.

Does the 10-year warranty cover refrigerant and labor costs? +

No, the warranty covers defective parts only. Refrigerant charges, labor for repairs, and wear items like capacitors require separate payment. However, ten years of coverage on the compressor itself provides meaningful protection during your system's most critical lifespan period.

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