Goodman 3.5 Ton 13 SEER Central Air Conditioner Condenser - R410A Single Stage Review 2026

// Bottom Line

This Goodman condenser delivers solid mid-range efficiency at an attractive price point for residential replacements and new builds. It's ideal for budget-conscious contractors and homeowners who want proven cooling performance without paying for top-tier SEER ratings or Energy Star certification.

Review

The Goodman GSX130421 positions itself squarely in the middle market for residential air conditioning condensers. At $1,419, this 3.5-ton unit targets contractors and homeowners seeking dependable cooling without premium efficiency features. Goodman's reputation for no-frills reliability combined with straightforward installation makes this condenser a practical choice for replacement applications and new construction where total system cost matters as much as individual component performance.

This single-stage condenser produces 42,000 BTU of cooling capacity with a 13 SEER rating, delivering respectable seasonal efficiency without demanding installation complexity. The reciprocating compressor operates at fixed capacity, meaning it runs full-speed or off, which simplifies troubleshooting but reduces efficiency at partial loads. At 75 dB, noise levels run slightly higher than variable-speed alternatives, though still acceptable for most residential applications. The unit requires 208/230V single-phase power with breaker sizing between 23.9 and 40 amps, making electrical integration straightforward for standard residential panels.

Pros & Cons

Pros

13 SEER rating provides respectable efficiency for a single-stage unit without premium pricing
42,000 BTU capacity handles standard 3.5-ton cooling loads for typical 1,500-1,800 sq ft homes
Reciprocating compressor design is field-proven with widespread contractor familiarity and parts availability
10-year warranty with online registration offers solid coverage at this price tier
Compact footprint at 29x29x36.25 inches fits standard equipment pads and tight installations

Cons

75 dB noise level runs louder than variable-speed competitors, potentially noticeable during operation
Single-stage operation means the compressor runs at full capacity or off, reducing part-load efficiency
Not Energy Star certified, missing potential utility rebates available in some regions
R410A refrigerant phase-out timeline means future servicing may become more expensive as stocks deplete

Who Should Buy

Best For

Contractors replacing units in price-sensitive residential markets and homeowners with stable cooling needs in moderate climates will appreciate the 13 SEER efficiency paired with straightforward installation and reasonable cost. This unit works particularly well for replacement jobs where matching existing equipment simplicity matters more than chasing maximum efficiency ratings.

Consider Alternatives If

Buyers in high-efficiency-mandate regions, those seeking Energy Star rebates, or homeowners in extreme climates where variable-capacity cooling would significantly reduce operating costs should look at SEER 16+ competitors.

Goodman 3.5 Ton 13 SEER Central Air Conditioner Co

$1419

Buy at HVACDirect →

Installation

Installation centers on standard line sizing with 3/8-inch liquid and 7/8-inch suction connections using sweat-type valves. The 206-pound weight allows single-technician handling, and the compact 29x29x36.25-inch dimensions fit standard equipment pads. Goodman provides comprehensive documentation including installation manuals and technical guides. Most experienced HVAC contractors complete condenser installation in 2-3 hours, making this unit suitable for technicians at any experience level.

Warranty & Reliability

Goodman backs this condenser with a 10-year warranty upon online registration, covering parts and labor during the protection period. This standard coverage aligns with competitor offerings at this price point and provides reasonable peace of mind for residential applications. Registration is straightforward and extends protection beyond basic manufacturer claims, rewarding buyers who complete the simple online process.

Specifications

SKU	GSX130421
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)	75
Weight (in lbs)	206.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	13
Condenser Stages	Single Stage
Compressor Type	Reciprocating
Liquid Line	3/8"
Suction Line	7/8"
Liquid Valve Size	3/8"
Max Breaker Size	40 amps
Min. Breaker Size	23.9 amps
Tonnage	3.5 Ton
Valve Type	Sweat
Height	36.25"
Width	29"
Depth	29"
Resources	Goodman Installation Manual Goodman Specifications Goodman Technical Manual Goodman Warranty Information Goodman Brochure 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

What size home does this 3.5-ton condenser cool effectively? +

The 42,000 BTU capacity typically handles 1,500 to 1,800 square feet in moderate climates with adequate insulation. Actual coverage depends on local temperature extremes, ceiling height, and solar exposure. Professional load calculation ensures proper sizing for your specific home rather than relying on rules of thumb.

Will this condenser work with my existing furnace or air handler? +

The GSX130421 uses standard R410A refrigerant and sweat connections compatible with most modern equipment manufactured after 2010. Verify your indoor coil matches 3.5-ton capacity and R410A compatibility before purchasing. Mixing different refrigerants or mismatched tonnage significantly reduces efficiency and voids warranties.

How does 13 SEER compare to newer high-efficiency options? +

A 13 SEER rating represents solid mid-range efficiency, roughly 20 percent less efficient than 16+ SEER variable-capacity units. In moderate climates, annual cooling costs difference runs $100-200 depending on usage. High-efficiency equipment justifies higher upfront cost primarily in extreme heat regions with heavy cooling loads.

Is this better than budget brands like Champion or Carrier's entry models? +

Goodman, Champion, and Carrier all deliver similar mid-tier performance at comparable prices. Goodman offers strong parts availability and contractor support. Choose based on your local service network, warranty trust, and which brand your preferred technician stocks parts for regularly.

What does the 10-year warranty actually cover? +

Goodman covers manufacturing defects in compressors, coils, and electrical components for 10 years with registration. Labor coverage depends on your specific plan terms. Review the warranty documents carefully, as coverage excludes damage from improper installation, refrigerant mixing, or lack of maintenance.

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