Independent Review · Updated June 2026

3 Ton 18 SEER Two Stage Goodman Air Conditioner Condenser

Efficient two-stage cooling at a mid-market price point for residential homes

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 18 SEER Two Stage Goodman Air Conditioner Condenser
Current Price
$3017
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This 3-ton condenser suits homeowners in moderate climates seeking solid efficiency without premium pricing. The 18 SEER rating and two-stage operation deliver real energy savings, particularly in partial-load conditions when your AC doesn't need to run at full capacity.

Review

Goodman's 3-ton two-stage condenser occupies the practical middle ground in residential cooling equipment. At $3,017, it delivers legitimate efficiency credentials through its 18 SEER1 rating while maintaining straightforward installation requirements. The two-stage design sets it apart from basic single-stage models, allowing the compressor to operate at reduced capacity during shoulder seasons when full output is unnecessary. This positioning makes it particularly relevant for contractors and homeowners balancing performance expectations with realistic budget constraints.

The unit generates 35,000 BTU of cooling capacity using R410A refrigerant and a proven scroll compressor design. Two-stage operation means the system can throttle down to approximately 60 percent capacity during partial-load conditions, substantially reducing energy consumption on days when outdoor temperatures don't demand maximum cooling effort. The 71 dBA noise level registers as moderate, noticeable but not excessive from typical seating distances. Electrical requirements are straightforward: 208 or 230V single-phase at 60 Hz, with breaker sizing between 21.3 and 35 amps, fitting standard residential service.

Pros & Cons

Pros

  • 18 SEER1 efficiency rating qualifies for Energy Star, reducing long-term operating costs
  • Two-stage compressor operation minimizes runtime and energy consumption during mild weather
  • 35,000 BTU capacity properly sized for 3-ton systems in 1,200-1,500 sq ft homes
  • Scroll compressor design is proven reliable with fewer moving parts than reciprocating alternatives
  • Lifetime compressor warranty plus 10-year unit and parts coverage provides solid protection

Cons

  • 71 dBA noise level is moderately loud, noticeable from nearby patios during full-stage operation
  • 208/230V single-phase requirement limits installation flexibility in some older homes
  • Two-stage efficiency advantage diminishes in very hot climates where the unit runs constantly at full capacity

Who Should Buy

Best For

Homeowners in temperate to warm climates seeking reliable cooling with good energy efficiency and reasonable upfront cost. This unit makes sense if you want an EPA-compliant system with proven durability and don't need the quietest operation available.

Consider Alternatives If

Anyone needing whisper-quiet operation, living in extreme heat regions where single-stage would be equally efficient, or working with older electrical infrastructure that cannot support 208/230V single-phase power.

3 Ton 18 SEER Two Stage Goodman Air Conditioner Co
$3017
Buy at HVACDirect →

Installation

Installation involves sweat valve connections using 3/4 inch suction and 3/8 inch liquid lines. The 238-pound unit requires a level concrete pad and approximately 35.5 x 35.5 inches of space, manageable for most residential applications. Standard clearance requirements apply to ensure adequate airflow around the condenser coil. Pairing this condenser with a compatible indoor air handler is essential, and proper refrigerant charging must occur after line evacuation.

Warranty & Reliability

Goodman extends lifetime coverage on the compressor, protecting against internal failures indefinitely. The 10-year unit replacement warranty addresses catastrophic failure, while 10-year parts limited warranty covers components beyond the compressor. This coverage structure is competitive in the mid-range market segment and reflects reasonable confidence in component durability without reaching top-tier extended protection.

Specifications

SKUGSXC180361
Brand/ManufacturerGoodman
Cooling BTU35,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
WarrantyLifetime compressor, 10 year unit replacement, and 10 year parts limited warranties
Decibel Level (dBA)71
Weight (in lbs)238.000000
FeatureSpec
Product FeaturesTwo Stage Condenser
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size3/4"
Max Breaker Size35 amps
Min. Breaker Size21.3 amps
Tonnage3 Ton
Valve TypeSweat
Height38.25"
Width35.5"
Depth35.5"
ResourcesGoodman Specifications Goodman Installation Instructions Goodman Kit Instructions Goodman Parts Manual You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 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 homes is this 3-ton condenser sized for? +
Three-ton capacity suits homes between 1,200 and 1,500 square feet in temperate climates. Larger homes or hot regions typically need 4-ton or 5-ton units, while smaller homes may only require 2.5 tons. Proper sizing depends on insulation, window orientation, and local cooling degree days.
Can this condenser connect to my existing indoor equipment? +
Yes, if your indoor coil and furnace are rated for 3-ton capacity and compatible with R410A refrigerant. Check your existing equipment's tonnage rating before purchasing. Mismatched condenser and indoor coil capacities compromise efficiency and system reliability.
How much will the two-stage operation actually save me on energy bills? +
Two-stage systems typically reduce annual energy consumption 10 to 15 percent compared to single-stage units in moderate climates with significant part-load operation. Savings are most dramatic during spring and fall when temperatures fluctuate. Hot climates where cooling runs continuously see smaller percentage savings.
How does the 18 SEER rating compare to higher-efficiency models? +
An 18 SEER unit is solidly above the minimum 14 SEER requirement and qualifies for Energy Star rebates. Premium models reach 20 to 24 SEER but cost substantially more. The 18 SEER sweet spot delivers meaningful efficiency gains without premium pricing or refrigerant complications.
What does the lifetime compressor warranty actually cover? +
Lifetime coverage protects against internal compressor failure from manufacturing defects, provided the system receives proper maintenance and correct charging. It does not cover costs of labor, refrigerant, or diagnostics. Read the full warranty terms for specific exclusions.

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