1.5 Ton 14 SEER Goodman Air Conditioner with Horizontal Slab Coil Review 2026

// Bottom Line

This ACiQ horizontal slab coil is ideal for contractors building cost-effective replacement systems or new installations in modest-sized spaces. At 1.5 tons with 14 SEER1 efficiency and modern R454B refrigerant, it delivers solid performance without premium pricing.

Review

The ACiQ 1.5-ton horizontal slab coil represents the practical middle ground in the residential HVAC market. Positioned as a Goodman alternative without the brand premium, this 18,000 BTU unit targets contractors seeking value without sacrificing performance. It arrives pre-charged, ready for straightforward integration into existing systems, making it popular for both retrofit work and new construction where cost control matters as much as capability.

Performance specs reveal a capable unit built for moderate climates and standard usage patterns. The 14 SEER1 efficiency rating delivers respectable energy performance, translating to moderate utility costs without premium pricing. Using modern R454B refrigerant ensures compatibility with current EPA regulations and future compliance. The single-stage rotary compressor runs continuously rather than modulating, which trades slight efficiency flexibility for mechanical simplicity and proven durability in field installations.

Pros & Cons

Pros

18,000 BTU capacity with 14 SEER1 meets mid-range efficiency standards for retrofit and new builds
R454B refrigerant future-proofs the system against phase-out regulations affecting older refrigerants
Horizontal slab configuration fits tight crawlspaces and concrete slabs where vertical units won't work
10-year warranty with online registration provides solid long-term protection
Single-stage rotary compressor design offers proven reliability in residential applications

Cons

71 dB noise level runs slightly louder than premium variable-stage competitors, noticeable in quiet settings
Not Energy Star certified, missing potential utility rebates available for higher-efficiency units
Single-stage operation means no part-load efficiency gains during mild weather conditions

Who Should Buy

Best For

Contractors and homeowners managing tight budgets or replacing older 1.5-ton systems in standard residential applications. This unit works especially well in homes with limited outdoor space or where horizontal installation is the only viable option.

Consider Alternatives If

Buyers prioritizing whisper-quiet operation or maximizing energy rebates should consider higher-efficiency variable-stage models with Energy Star certification.

1.5 Ton 14 SEER Goodman Air Conditioner with Horiz

Buy at HVACDirect →

Installation

Installation requires standard 208/230V single-phase 60 Hz electrical service with a 12 to 30 amp breaker sized appropriately for your specific installation. Refrigerant lines use 3/8 inch liquid and 3/4 inch suction connections with 3/4 inch insulation thickness on the suction line. The horizontal design measures 33.5 inches wide by 25 inches tall by 12 inches deep, demanding careful measurement of crawlspace or slab area before purchasing.

Warranty & Reliability

ACiQ provides a solid 10-year warranty on compressor and components when you register the unit online within a specified timeframe. This coverage protects against defects in materials and workmanship, though it does not cover improper installation, refrigerant leaks from user damage, or lack of maintenance. Registration is essential to activate coverage.

Specifications

SKU	ACIQ-18-EHPD-UPG
Brand/Manufacturer	ACiQ
Cooling BTU	18,000
Refrigerant	R454B
Electrical	208 / 230 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	120.000000
Feature	Spec
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Rotary
Liquid Line	3/8"
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 amps
Min. Breaker Size	12 amps
Tonnage	3 Ton
Height	25"
Width	33.5"
Depth	12"
Resources	CSCF Installation Manual CSCF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® 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.
Configuration	Horizontal
Suction Line	3/4"
Style	Slab
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What size home does the 1.5-ton 18,000 BTU capacity handle? +

Generally appropriate for spaces between 600 and 900 square feet depending on insulation, climate zone, and sun exposure. Have a load calculation performed by a licensed contractor to confirm sizing for your specific home, as undersized or oversized units operate inefficiently and cause comfort problems.

Can this horizontal coil connect to my existing ductwork? +

Yes, the horizontal slab configuration connects to standard horizontal ductwork systems. Verify liquid and suction line sizes match your existing condensing unit or replacement unit specifications. Professional installation ensures proper refrigerant charge and airflow balance for optimal performance.

How does 14 SEER1 compare to newer high-efficiency units? +

14 SEER1 meets federal minimum standards for new equipment but trails variable-stage systems rated 16-18 SEER2. Energy Star certified units typically save 10-15 percent annually on cooling costs, though your actual savings depend on local electricity rates and climate zone.

Why choose this over Goodman or Lennox horizontal coils? +

ACiQ pricing typically undercuts Goodman by 15-25 percent while using identical manufacturing standards and R454B refrigerant. Lennox units cost considerably more. The warranty and reliability profile are comparable, making this a strong value option for budget-conscious contractors and homeowners.

Does online registration really matter for the warranty? +

Yes, registration is required to activate the 10-year warranty coverage. Without it, you may receive only limited coverage. Register immediately after installation to protect your investment and ensure claim eligibility if problems develop.

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