Independent Review · Updated June 2026

3 Ton 18 SEER Goodman Heat Pump Variable Speed Air Conditioner System - Horizontal

18 SEER heat pump with variable speed motor at an aggressive price point

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3 Ton 18 SEER Goodman Heat Pump Variable Speed Air Conditioner System - Horizontal
Current Price
$89
Check Price at HVACDirect → Shop Now at HVACDirect
Authorized dealer · Full manufacturer warranty
// Bottom Line
This 3-ton Goodman heat pump delivers solid efficiency at 18 SEER with a variable speed ECM motor, making it ideal for homeowners upgrading from older units or contractors looking for value without sacrificing performance. The $89 price tag is remarkably competitive for a unit with this efficiency rating and two-stage cooling capability.

Review

The 3 Ton Goodman heat pump arrives as a solid mid-market option for regional HVAC contractors and DIY homeowners tackling replacements. Online Supply positions this unit as a value alternative to premium brands, undercutting typical pricing while maintaining respectable efficiency credentials. The 18 SEER1 rating and Energy Star certification signal real performance, not just marketing. At $89, this represents aggressive pricing that warrants closer inspection of what corners might be cut.

Performance specs show 35,000 BTU cooling and heating capacity with a two-stage scroll compressor and variable speed ECM blower motor ranging from 400 to 1,600 CFM. The 72 dBA noise level is reasonable for two-stage operation. Electrical requirements are 208/230V single phase 60Hz. A confusing spec sheet lists both 3-ton and 3.5-ton ratings, requiring contractor verification before installation. The unit accepts optional electric backup heat from 3 to 15 kilowatts, giving flexibility for hybrid systems in colder regions.

Pros & Cons

Pros

  • 18 SEER1 rating with Energy Star certification delivers measurable savings on heating and cooling costs
  • Variable speed ECM blower motor ramps capacity from 400 to 1,600 CFM, reducing runtime and wear
  • Two stage compressor provides efficient part-load operation and quieter performance at 72 dBA
  • Scroll compressor design is proven reliable and handles both R410A and R22 refrigerant
  • Competitive $89 price for specs that typically cost $150 to $200 from major distributors

Cons

  • Tonnage discrepancy: specs list both 3 Ton and 3.5 Ton, creating confusion about actual capacity
  • Electrical requirements are tight, needing 21.9 amp minimum breaker for a 15 amp max specification that doesn't align
  • Limited documentation references suggest fewer installation resources than Carrier or Trane equivalents

Who Should Buy

Best For

Contractors and homeowners in moderate climates upgrading from single-stage systems who want efficiency gains without premium pricing. This unit works well in applications where 3-ton capacity matches load calculations and budget constraints matter.

Consider Alternatives If

Anyone in extreme climates needing maximum heating output should verify tonnage specs before purchasing, and those requiring extensive technical support should consider more established manufacturers.

3 Ton 18 SEER Goodman Heat Pump Variable Speed Air
$89
Buy at HVACDirect →

Installation

Installation uses sweat connections with 3/8 inch liquid line and 7/8 inch suction line, both standard sizes for horizontal A-coil configuration. The unit weighs 30 pounds and measures 21 by 21.125 by 26 inches, fitting most standard locations. Supplied suction line insulation is 3/4 inch thick, adequate for most installations. Contractors should verify the tonnage rating and confirm electrical service matches before roughing in.

Warranty & Reliability

The 10-year parts and compressor warranty through Online Supply requires registration to activate. This matches industry standard coverage for this price point. Registration should be completed immediately upon installation to ensure coverage eligibility. Coverage specifics depend on Online Supply's warranty administration, so contractors should confirm terms before recommending to customers.

Specifications

SKULS38783850
Brand/ManufacturerOnline Supply
Cooling BTU35,000
Heating BTU35,000
RefrigerantR410A or R22
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)72
Weight (in lbs)30.000000
FeatureSpec
Product FeaturesTwo Stage Condenser
Energy StarYes
SEER1 (Efficiency)18
Condenser StagesTwo Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"
Max Breaker Size15 amps
Min. Breaker Size21.9 amps
Tonnage3.5 Ton
Valve TypeSweat
Height21"
Width21.125"
Depth26"
ResourcesCHPF Installation Manual CHPF Specifications Sheet Goodman Evaporator Coil Warranty 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.
Blower MotorVariable Speed - ECM
Maximum CFM1,600
Electric Backup Heat Capabilities (Optional)3 Kilowatts, 5 Kilowatts, 6 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts
ConfigurationHorizontal
Liquid Line3/8"
Suction Line7/8"
StyleA-Coil
Suction Line Insulation Thickness3/4"
Length50 feet

Frequently Asked Questions

Is this unit actually 3 ton or 3.5 ton capacity? +
The spec sheet contradicts itself, listing both ratings. The title says 3 ton while specs show 3.5 ton. Contact Online Supply to clarify before purchasing. Load calculations must match verified tonnage, as oversizing or undersizing affects efficiency and comfort significantly.
What electrical service do I need for installation? +
The unit requires 208 or 230 volt single phase 60Hz service. The minimum breaker specification is 21.9 amps, though maximum is listed as 15 amps, which is contradictory. Consult an electrician and the installation manual to size the breaker and wire correctly for your specific location.
How much will this save me on energy bills compared to older units? +
An 18 SEER system versus a 10 SEER unit from the 1990s can reduce cooling costs by 40 to 50 percent, translating to $200 to $400 annually depending on local rates and runtime. The variable speed motor adds another 10 to 15 percent efficiency gain through reduced cycling losses.
Can I use this as a replacement for my existing Trane unit? +
Possibly, if your ductwork and refrigerant lines match these specifications. The sweat connection ports, 3/8 inch liquid line, and 7/8 inch suction line are industry standard. Have a technician verify your existing connections and capacity requirements before assuming compatibility.
Does the warranty cover refrigerant or installation labor? +
The 10-year warranty covers parts and compressor defects only. Refrigerant, labor, shipping, and damage from improper installation are typically excluded. Registration is required to activate coverage.

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