Independent Review · Updated June 2026

3.5 Ton 13 SEER Goodman Air Conditioner with Vertical 21" Cased Coil

Budget-friendly 3.5-ton AC with solid 13 SEER efficiency and straightforward installation.

8.2
IndustrialRank Score
Efficiency
8.5
Reliability
7.8
Value
8.0
Installation
8.5
Warranty
8.0
3.5 Ton 13 SEER Goodman Air Conditioner with Vertical 21
Current Price
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// Bottom Line
This ACiQ unit is ideal for budget-conscious homeowners and contractors replacing older 3.5-ton systems in mild to moderate climates. The 13 SEER rating delivers respectable efficiency without premium pricing, making it a practical choice for straightforward residential installations.

Review

The ACiQ 3.5-ton air conditioner represents the practical middle ground in residential cooling equipment. Manufactured under Goodman specifications, this condenser coil delivers straightforward performance without luxury features or premium pricing. Designed for vertical A-coil configuration with 21-inch width, it fits standard equipment closets and existing installations. The unit targets contractors and homeowners who need reliable cooling capacity without overspecifying or chasing energy rebates.

Performance specs show 42,000 BTU cooling capacity with 13 SEER efficiency, meaning realistic seasonal performance of approximately 13 EER under standard conditions. The single-stage reciprocating compressor runs on 208/230V single-phase power, requiring a 23.9 to 40-amp breaker. Refrigerant lines measure 3/8-inch liquid and 7/8-inch suction, standard for retrofit compatibility. At 120 pounds and 75 dB output, noise levels are typical for this efficiency tier, notable but not excessive.

Pros & Cons

Pros

  • 13 SEER efficiency rating provides solid cooling performance at 42,000 BTU output for standard 3.5-ton applications
  • Compact 21-inch width fits existing cased coil spaces and tight mechanical rooms without major ductwork modifications
  • Standard R410A refrigerant with 3/8-inch and 7/8-inch line sizes matches most existing residential systems
  • Single-stage reciprocating compressor design is proven, serviceable, and cost-effective for contractors
  • 10-year warranty with online registration provides meaningful coverage for residential use

Cons

  • Not Energy Star certified, missing qualification for some utility rebate programs
  • 75 dB noise level is louder than higher-efficiency variable-speed competitors, noticeable during operation
  • 13 SEER is mid-range efficiency, not optimal for hot climates where 16+ SEER units provide faster payback

Who Should Buy

Best For

Homeowners in temperate climates seeking reliable replacement cooling without premium pricing, and contractors installing systems for price-sensitive customers. This unit works well for older homes where higher-efficiency compressors may stress aging electrical panels.

Consider Alternatives If

Buyers in very hot regions prioritizing maximum efficiency rebates, or those wanting whisper-quiet operation and Energy Star certification.

3.5 Ton 13 SEER Goodman Air Conditioner with Verti
$0
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Installation

Installation is straightforward for experienced HVAC technicians. The unit comes with factory-installed 30-foot suction line insulation at 3/8-inch thickness, reducing on-site prep. Sweat-type valve connections are industry-standard, requiring basic brazing skills. The 26-inch height, 21-inch width, and 21-inch depth fit most equipment spaces. Electrical hookup is basic single-phase, suitable for homes with standard service panels.

Warranty & Reliability

ACiQ provides 10 years of parts coverage upon online registration. This aligns with industry standards for residential equipment, offering reasonable protection against compressor and component failure. Requires registration within a specified period after installation to activate full coverage. Evaporator coil carries separate Goodman warranty, covering refrigerant leaks during the warranty term.

Specifications

SKUACIQ-4X-EHPD-UPG
Brand/ManufacturerACiQ
Cooling BTU42,000
RefrigerantR410A
Electrical208 / 230 V. 1 Phase 60 Hz
Warranty10 Years with Online Registration
Decibel Level (dBA)75
Weight (in lbs)120.000000
FeatureSpec
Energy StarNo
SEER1 (Efficiency)13
Condenser StagesSingle Stage
Compressor TypeReciprocating
Liquid Line3/8"
Suction Line7/8"
Liquid Valve Size3/8"
Max Breaker Size40 amps
Min. Breaker Size23.9 amps
Tonnage3.5 Ton
Valve TypeSweat
Height26"
Width21"
Depth21"
ResourcesCAPF Installation Manual CAPF 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.
ConfigurationUpflow / Downflow
StyleA-Coil
Suction Line Insulation Thickness3/8"
Length30 feet

Frequently Asked Questions

Will this 3.5-ton unit handle a 3,500-4,000 square foot home? +
Generally yes, depending on insulation and climate. The 42,000 BTU capacity handles most moderate homes in temperate zones. Hot climates or poor insulation may require upsizing to 4 or 5 tons. Have a load calculation performed to confirm sizing for your specific home.
Can I reuse existing refrigerant lines and electrical from my old system? +
Possibly. If your old system used R410A with matching 3/8-inch and 7/8-inch lines, existing connections work. Verify line sizes and ensure your breaker capacity meets the 23.9-40 amp requirement before installation.
How does 13 SEER compare to newer high-efficiency units? +
13 SEER is mid-range. Modern units reach 16-21 SEER using variable-speed compressors. You'll save 15-25 percent annually with higher efficiency, but payback takes 8-12 years. Best for moderate climates or budget-constrained replacements.
Is this compatible with my existing Goodman evaporator coil? +
Likely yes. Most Goodman vertical 21-inch A-coils work with ACiQ equipment of matching tonnage. Verify the coil model matches 3.5-ton specs. Some older coils require adapters or replacement for optimal performance.
What happens if I register the warranty after installation? +
Online registration activates the 10-year coverage. Register promptly after installation with proof of purchase and installation date. Late registration may void coverage, so contact ACiQ immediately upon receipt.

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