Product overview
ACiQ 18,000 BTU 1.5 Ton 25.1 SEER2 High Efficiency Multi-Zone Condenser | Inverter - R454B
Model: ES-18Z-M3C
Summary
The ACiQ ES-18Z-M3C is a high-efficiency, multi-zone heat pump condenser designed to support up to 3 indoor air handlers. With an impressive 25.1 SEER2 rating and inverter technology, this 18,000 BTU unit automatically adjusts performance to maintain precise temperatures while maximizing energy efficiency.
This all-season solution provides efficient cooling in outdoor temperatures from -13°F to 122°F and heating from -13°F to 75°F. The Gold Fin full-protection coating on the condenser coil enhances durability, while quiet operation (59.5 dB) makes it suitable for residential applications.
Ideal for creating customized comfort zones, this system allows different temperature settings in each room and can be paired with various ACiQ indoor unit types. The advanced inverter technology and high SEER2 rating deliver significant energy savings over conventional systems.
Important
Professional installation required - this is not a DIY unit. Registration is required within 60 days of installation for full warranty coverage. A minimum of two air handlers must be connected for the system to function properly.
What's Included
- Outdoor Condenser Unit [SKU: ES-18Z-M3C] (18,000 BTU 208/230V)
- Installation Manual
- Owner's Manual
- Manufacturer Warranty Information
Key Features:
- Inverter Technology with Twin Rotary Compressor
- High SEER2 Efficiency (25.1)
- Multi-Zone Operation (Supports up to 3 indoor units)
- Quiet Operation (59.5 dB)
- Gold Fin Condenser Coil Protection
- Wide Operating Temperature Range
- Energy Star Certified
- 208/230V Power Supply
- R454B Refrigerant (Environmentally Friendly)
Technical Information
Model Number: ES-18Z-M3C
| System type | Multi-zone heat pump (2-3 zones) |
| Cooling Capacity | 18,000 BTU |
| Heating Capacity | 19,000 BTU |
| Power source | 208/230V, 1Ph, 60Hz |
| SEER2 Rating | 25.1 |
| HSPF2 Rating | 9.8 |
| Refrigerant type | R454B |
| Refrigerant Charge | 73.8 oz |
| Operating temperature range (Cooling) | -13°F to 122°F |
| Operating temperature range (Heating) | -13°F to 75°F |
| Noise level (Outdoor) | 59.5 dB(A) |
| Max CFM | 1766 |
| Line Set Connections | 3/8" suction (3), 1/4" liquid (3) |
| Electrical Requirements | 16-20A breaker |
| Dimensions (WxDxH) | 35.04x13.46x26.50 in |
| Net Weight | 109.35 lbs |
| AHRI Certificate Number | 216032376 |
Warranty
- 12 year compressor limited warranty (with registration)
- 7 year parts limited warranty (with registration)
- Must be installed by licensed HVAC professional
- View Full Warranty Details
Compatible Systems
This condenser is designed to work with ACiQ ductless mini-split air handlers. The total connected capacity of indoor units can be up to 1.25 times the condenser rating (22,500 BTU). Some compatible models include:
- ACiQ 9K BTU Wall Mounted Air Handler
- ACiQ 12K BTU Wall Mounted Air Handler
- ACiQ 18K BTU Wall Mounted Air Handler
- ACiQ Ceiling Cassette Units
- ACiQ Slim Duct Units
Zone Combination Examples
| 2-ZONE SYSTEMS | 3-ZONE SYSTEMS |
| 9K + 9K | 9K + 9K + 9K |
| 9K + 12K | 9K + 9K + 12K |
| 12K + 12K | 9K + 12K + 12K |
| 9K + 18K | 12K + 12K + 12K |
| 12K + 18K | 9K + 12K + 18K |
Note: Total connected capacity must not exceed 22,500 BTU
Certifications
Energy Star Certified | AHRI Certified | EPA Refrigerant Compliant
Manuals & Downloads
In-stock systems ship fast and free with curbside freight delivery, typically arriving in 4–10 days. Please inspect each box at delivery and note any damage on the receipt before signing — it keeps any freight claim quick and simple.
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At a glance
Tech specs
| Condenser capacity | 18K BTU |
|---|---|
| Zones / rooms | 2 Zones |
| Power | 230 Volt |
| Mount type | Wall |
| Installation | DIY |
| Brand | ACiQ |
Sizing in doubt? Our HVAC experts confirm capacity for your rooms before you order — free. Ask us about utility rebates for high-efficiency heat pumps in your area.
