aciq|SKU:ES-18Z-M2/ACIQ-09W-HH-M-2

ACiQ 18,000 BTU 2-Zone Mini Split with 22.9 SEER2 Inverter Efficiency

Grid-Independent Climate Control for Two Zones

22.9 SEER2 efficiency — Cuts energy draw with inverter-driven precision
Heats to -13°F — Reliable warmth in extreme cold without backup
2-zone independent control — Different temps per room, shut off unused zones
WiFi smart control — Monitor and adjust from anywhere via app
  • FREE System Design Consultation -- We verify compatibility with your inverter and battery bank
  • FREE Shipping -- Ships free, including LTL freight on large orders
  • Compatibility Guarantee -- Pre-vetted to work with your off-grid power setup

$2,534.95

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ACiQ 18,000 BTU 22.9 SEER2 2-Zone Wall Mounted Mini Split System w/ WiFi
ACiQ 18,000 BTU 22.9 SEER2 2-Zone Wall Mounted Mini Split System w/ WiFi
$2,534.95

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In the box

  • Condenser unit (pre-charged R410A)
  • 2 wall-mounted air handlers
  • Smart remote controls
ACiQ 18,000 BTU 22.9 SEER2 2-Zone Wall Mounted Mini Split System w/ WiFi
ACiQ 18,000 BTU 2-Zone Mini Split with 22.9 SEER2 Inverter Efficiency
$2,534.95

Grid-Independent Climate Control for Two Zones

Engineered for grid-independent living, the ACiQ 18,000 BTU 2-zone mini split delivers 22.9 SEER2 efficiency with reliable heating down to -13°F and cooling up to 122°F. This field-tested system uses a variable inverter twin rotary compressor to maintain precise temperatures across two zones independently. Pre-charged with R410-A refrigerant for 25' per air handler connection, it's built for off-grid cabins, homesteads, and remote structures where utility power isn't an option. WiFi control via the NetHome Plus app puts comfort management in your pocket from anywhere.

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22.9 SEER2 Efficiency
2-Zone Control
WiFi + Voice Ready
Heats to -13°F
18,000 BTU
Cooling Capacity
22.9 SEER2
Energy Efficiency
108.69 lbs
System Weight
Inverter Efficiency That Shrinks Your Solar Load

Inverter Efficiency That Shrinks Your Solar Load

The utility company doesn't care that rates climbed 40% in five years. You do. This ACiQ system's variable inverter twin rotary compressor eliminates the start-up surge that kills smaller off-grid setups, drawing only the power you actually need. At 22.9 SEER2, it delivers 18,000 BTU of cooling while keeping your battery bank size reasonable. Unlike fixed-speed units that slam your inverter with locked-rotor amps, this field-tested system ramps smoothly. Off Grid Vault vetted this for real compatibility with common off-grid inverter setups so you don't discover a start-up spike problem after installation.

Two Zones, Zero Wasted Energy

Two Zones, Zero Wasted Energy

Run your bedroom at 65°F overnight and keep the main living area at 72°F during the day. This 2-zone system connects two 9,000 BTU air handlers to a single condenser, supporting up to 22,500 BTU total across both zones. Shut down heating or cooling in rooms you aren't using and watch your daily kWh consumption drop. Each wall-mounted handler has its own soft LED display showing real-time temperature and error codes from the self-diagnosing control board. You get personalized comfort without doubling your outdoor equipment footprint.

Heats Through Winter Without Backup Fuel

Heats Through Winter Without Backup Fuel

Heat pump performance collapses when temperatures drop below freezing on most systems. This ACiQ unit maintains reliable heating down to -13°F, covering the majority of winter conditions across the Midwest, Southeast, and Pacific Northwest without switching to electric resistance strips. The 19,000 BTU heating capacity at low ambient means your off-grid battery bank handles climate control without a gas generator. Whisper-quiet indoor and outdoor units keep your space comfortable without intrusion. Self-diagnosing control boards send error alerts directly to each air handler so you catch problems before they become failures.

Installation Compatibility

Confirm your setup meets these requirements before ordering.

  • 208/230V 1-phase electrical supply with 18A to 25A breaker capacity
  • 3-inch wall penetration available for each air handler refrigerant line exit
  • Outdoor mounting location with adequate available for condenser unit

Built for Self-Reliant Living

Where grid power is unreliable or nonexistent, this system delivers independent climate control.

Off-Grid Cabins
Homestead Zone Control
Solar-Powered Retreats

Full specifications

At a glance

Dimensions
25 A
Warranty
7 years (with registration at ACiQ.com)
Full specifications15 data points across 4 categories

Dimensions

Weight108.69 lbs

Power & Performance

Cooling BTU18000 BTU
Heating BTU19000 BTU
SEER222.9
Electric HeatHeat Pump
Compressor TypeRotary
Tonnage1.5 Ton
Electrical208/230V 1 Phase 60 Hz
Max Breaker Size25 A
Min. Breaker Size18 A
Refrigerant Charge50'
Mini Split TypeWall Mounted

Materials

ConstructionSee product page

Compliance & Warranty

Parts Warranty7 years (with registration at ACiQ.com)
Compressor Warranty12 years (with registration at ACiQ.com)

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. If it doesn't meet our standards, it doesn't make the cut.

30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days in original packaging.
Free ShippingShips free on all orders, including LTL freight on large systems. No thresholds, no surprise charges.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.

ACiQ 18,000 BTU 22.9 SEER2 2-Zone Wall Mounted Mini Split System w/ WiFi – 9+9

ACiQ’s Energy Star multi-zone mini split systems offer top-tier efficiency at a lower cost than Max Heat models. The ES-18Z-M2/ACIQ-09W-HH-M-2 Energy Star system delivers reliable heating down to -13°F and cooling in extreme temperatures up to 122°F—all at a competitive price.

Designed for adaptability, ACiQ is the smart choice for efficient heating and cooling in virtually any space and climate. With the ES-18Z-M2B, you can connect up to two air handlers to a single condenser, optimizing outdoor space while ensuring personalized comfort throughout your home. This 18,000 BTU system efficiently supports up to 22,500 BTU across all air handlers, thanks to its advanced inverter technology that continuously adjusts for precise temperature control. Set different temperatures in each room or turn off heating and cooling in unused areas, maximizing energy savings.

With a high efficiency rating of 22.9 SEER2, this system is engineered to save you money both upfront and over its lifetime. While the condenser comes pre-charged, please note that this model is not a self-install unit. A professional technician is required for installation, including vacuuming the lines and adding refrigerant as needed. Essential installation materials such as line sets, control wire, drain hose, whip, and disconnect are not included but can be purchased separately in the Accessories section.

For all multi-zone ACiQ condensers, at least two air handlers are required for operation.

Includes: 1 x 18,000 BTU Multi Zone Condenser, 2 x 9k BTU Wall Mounted (250 – 400 sq ft) Zone 1 and Zone 2



18,000 BTU ACiQ Multi Zone Condenser Specs

  • Refrigerant Charge: 50′
  • Weight: 108.69 lbs
  • Cooling BTU: 18000 BTU
  • Heating BTU: 19000 BTU
  • Electric Heat: Heat Pump
  • SEER2: 22.9
  • Compressor Type: Rotary
  • Electrical: 208/230V 1 Phase 60 Hz
  • Max Breaker Size: 25 A
  • Min. Breaker Size: 18 A
  • Tonnage: 1.5 Ton
  • Mini Split Type: Wall Mounted
  • Zone Compatibility: Multi Zone
  • Ambient Temperature Range: -15 ~ 122
  • Dimensions: 26.50″ H x 35.04″ W x 13.46″ D

9,000 BTU ACiQ Platinum Multi Zone Air Handler Specs

  • Weight: 22.7 lb
  • Cooling BTU: 9000 BTU
  • Heating BTU: 10000 BTU
  • Maximum CFM: 335.29
  • Decibel Level (dBA): 38
  • Electric Heat: Heat Pump
  • Refrigerant: R410A
  • SEER: 23-24
  • SEER2: 22.3
  • Electrical: 208/230V 1 Phase 60 Hz
  • BTU/Tonnage: 9,000 BTU/0.75 Ton
  • Mini Split Type: Wall Mounted
  • Zone Compatibility: Multi Zone
  • Dimensions: 33.40″ L x 11.76″ H x 9.18″ D



ACiQ 18,000 BTU 22.9 SEER2 2-Zone Features

  • Wall Mounted: Traditional wall-mounted air handlers are the most popular ductless choice due to low cost and ease of installation. Wall mounted units are located high on an outside wall, with refrigerant lines and condensation drain hose exiting the back through a 3″ wall penetration. Return air is brought in through vents in the top of the unit, and cooled or heated air exits the lower front through a sweepable louver. Wall mounted air handlers are WiFi compatible and can be controlled by the free NetHome Plus app or by voice assistants such as Alexa or Google Home.
  • Quality Construction: State-of-the-Art manufacturing is behind every ACiQ product, resulting in quiet, effective operation over a long service life. Most models have low ambient heating and cooling.
  • Highest Efficiency: ACiQ saves you money up front, but also over time by reducing energy bills. Every ACiQ condenser features a variable inverter twin rotary compressor, lowering wear and increasing performance. Compare specs against other brands in the same price category, and you will agree, ACiQ is the best value.
  • Installation and Maintenance: ACiQ multi zone condensers are pre-charged with R410-A refrigerant for 25′ per air handler connection. In many cases, no additional refrigerant is needed. All units are run-tested at the factory for years of trouble-free performance. Troubleshooting is easy thanks to unit’s self diagnosing control board with alerts that are sent to each connected air handler.
  • WiFi Options: ACiQ is WiFi ready! The wall mounted air handlers come with everything you need to control your home’s heating and cooling via smart device (iOS or Android) from anywhere in the world. ACiQ is also compatible with Amazon Alexa and Google Assistant. Please note that in order to function, this air handler must be installed with a condenser and other installation equipment, available at an additional cost if not already included in this product bundle.
  • Intelligent Heating and Cooling: The ACiQ-09W-HH-MB air handler includes a soft LED display on the front of the unit giving you information at a glance. The display shows room temperature by default but can also show temperature setpoint changes and mode changes. To ensure your unit runs properly throughout its lifetime, this display will also show any error codes from its self-diagnosing control board. The display can be switched off if desired, and the included smart remote has a built-in LCD display to show these notifications as well.
  • Smartphone App: In addition to the handheld or wired remote that is already included, wall mounted units are WiFi ready, and can be controlled from anywhere with a free app on your tablet or smartphone.
  • Longer life, longer warranty: Intelligent design goes into every element of ACiQ’s manufacturing ensuring flawless performance for years. Low friction, variable inverter twin rotary compressors give bulletproof reliability. Register equipment at ACiQ.com to extend warranty protection to 7 years parts, 12 years compressor.
  • Platinum Performance: ACiQ Platinum air handlers can be used with any ACiQ Multizone condenser or the Platinum Single Zone condenser to create a highly efficient, Hyper Heat system. This air handler can handle small to medium sized rooms using adaptive technology to constantly monitor and maintain your ideal temperature no matter what the weather outside.
  • Quiet Comfort: Every ACiQ system is precision engineered to quickly achieve set temperature and hold it there, no matter what the weather is outside. With whisper quiet indoor and outdoor units, ACiQ never intrudes on your peace and quiet.



Your Satisfaction with ACiQ is Guaranteed:

  • 12-Year Compressor Warranty
  • Lowest Price Guarantee

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About aciq Mini-Split HVAC

aciq is a trusted manufacturer of premium mini-split hvac. OffGridVault is an authorized dealer offering the full aciq lineup with free delivery, price match guarantee, and expert support.

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