ACiQ 3 Ton 17.5 SEER Heat Pump Split System - R410A Variable Speed - Multi-Positional Review 2026

// Bottom Line

This ACiQ unit works best for contractors and homeowners seeking a cost-effective replacement for mid-size homes without premium features. At $660, you get respectable 17.5 SEER efficiency and variable-speed operation that won't drain your budget, making it ideal for budget-conscious retrofits and standard residential applications.

Review

The ACiQ 3-ton heat pump represents a practical middle ground in the split system market. Priced at $660, this Online Supply unit targets contractors and budget-conscious homeowners seeking reliable performance without premium pricing. It delivers 36,000 BTU cooling and 34,000 BTU heating capacity, making it suitable for most residential applications in moderate climates. The variable-speed compressor and communicating capabilities elevate it beyond stripped-down budget options, while the 10-year warranty provides genuine consumer protection.

Performance metrics show solid efficiency credentials. The 17.5 SEER rating qualifies it as Energy Star certified, and the variable-speed scroll compressor achieves an EER range of 9.5 to 13, meaning the unit adjusts its output based on demand rather than cycling on and off. Maximum CFM reaches 2,500, powered by a 0.333 HP variable-speed motor running at 1,050 RPM. Single-phase 208/230/240V electrical compatibility and a 40-amp maximum breaker requirement simplify installation in most homes.

Pros & Cons

Pros

Excellent value at $660 for a communicating variable-speed 3-ton system with 17.5 SEER rating
Variable-speed scroll compressor delivers EER ratings between 9.5 and 13, adapting to actual cooling demand
Communicating thermostat capability allows for better system coordination and efficiency optimization
10-year no-hassle replacement warranty with online registration covers manufacturing defects
Energy Star certified with 36,000 BTU cooling and 34,000 BTU heating capacity for typical residential loads

Cons

SEER1 spec shows 18 but product is marketed as 17.5 SEER, creating specification inconsistency that needs clarification
Noise level at 71 dB is moderately loud compared to premium units, which may concern noise-sensitive homeowners
R410A refrigerant is being phased out in favor of lower-GWP alternatives like R454B and R32

Who Should Buy

Best For

Contractors performing residential replacements and homeowners with 2,500 to 3,500 square foot homes who prioritize upfront cost savings over ultra-high efficiency. This unit fits well in moderate climates and for buyers comfortable with solid mid-range performance rather than premium features.

Consider Alternatives If

Buyers in extremely hot or cold climates requiring maximum efficiency, or those seeking premium quiet operation and the latest refrigerant technology should look at higher-tier models.

ACiQ 3 Ton 17.5 SEER Heat Pump Split System - R410

$660

Buy at HVACDirect →

Installation

Installation follows standard split-system protocols with sweat connections for both 3/8-inch liquid and 7/8-inch suction lines. The unit measures 23 by 23 by 38.5 inches and weighs 30 pounds, making it manageable for two installers. ACiQ provides a detailed EHK installation manual, though you'll need Adobe Reader to access it. The 50-foot maximum line length allows flexibility in home layouts.

Warranty & Reliability

The 10-year no-hassle replacement warranty covers manufacturing defects when you register online. This straightforward approach means fewer claims denials and faster resolution than typical conditional warranties. However, this coverage typically excludes damage from improper installation, refrigerant mishandling, or normal wear. Registration is required to activate protection.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	34,000
Refrigerant	R410A
Electrical	208 / 230 / 240 Volts / 1 Phase
Warranty	10 Years No Hassle Replacement Warranty with Online Registration
Decibel Level (dBA)	71
Weight (in lbs)	30.000000
Feature	Spec
Resources	ACiQ EHK Installation Manual 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.
Replaces	FCM4X4800AL
Equivalent	Carrier Equivalent: KFCEH2601C10Tempstar Equivalent: EHK10AKB Bryant Equivalent: KFCEH2601C10
Communicating	Yes
Blower Motor	Variable Speed
Maximum CFM	2500
Motor RPM	1050
Horsepower	.333 HP
Electric Backup Heat Capabilities (Optional)	5 Kilowatts, 8 Kilowatts, 10 Kilowatts, 15 Kilowatts, 20 Kilowatts, 25 Kilowatts, 30 Kilowatts
Filter Size	19 7/8" x 21 1/2"
EER	9.5-13
Liquid Line	3/8"
Suction Line	7/8"
Phase	Single Phase
Max Breaker Size	40 Amps
Tonnage	3 Ton
Connection	Sweat
Certification	UL Listed
Height	38 1/2"
Width	23"
Depth	23"
Product Features	Variable Speed Condenser
Energy Star	Yes
SEER1 (Efficiency)	18
Condenser Stages	Variable Speed
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Min. Breaker Size	60 Amps
Electric Heat	10 Kilowatts
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

What does 17.5 SEER actually mean for my monthly cooling costs? +

SEER 17.5 means the unit removes 17.5 BTU of heat per watt-hour of electricity consumed. Compared to older 10 SEER units, expect 40 to 50 percent lower cooling costs. Actual savings depend on your climate, usage patterns, and local electricity rates. Your contractor can estimate savings based on your specific location.

Can I install this myself, or do I need a licensed technician? +

EPA regulations require EPA-certified technicians to handle refrigerant work, including charging this R410A system. You cannot legally self-install. Hiring a licensed HVAC contractor ensures proper charging, ductwork balancing, and warranty validity. Installation costs typically range from $1,500 to $2,500 depending on your region and ductwork condition.

How does variable-speed operation actually save energy compared to single-stage units? +

Variable-speed compressors modulate capacity to match demand rather than cycling on and off repeatedly. This continuous operation at partial load reduces energy waste and improves efficiency. The scroll compressor achieves higher EER ratings (9.5 to 13) at varying speeds, especially during partial-load conditions typical of spring and fall.

How does this ACiQ unit compare to equivalent Carrier or Tempstar models? +

ACiQ is Carrier's value brand. This unit replaces FCM4X4800AL and matches Carrier KFCEH2601C10 and Tempstar EHK10AKB specifications. Expect identical performance and reliability. The main difference is price, with ACiQ typically costing 15 to 25 percent less than equivalent Carrier-branded units sold through traditional channels.

What backup heating options are available if my heat pump can't keep up in winter? +

Optional electric resistance heat strips range from 5 to 30 kilowatts. A 10 kW strip suits most 3-ton systems in moderate climates. Your installer will size based on your winter heating demands and desired temperature recovery speed. Larger strips cost more but heat faster during extreme cold.

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