MRCOOL
MRCOOL® 18k DIY 5th Generation Mini-split Air Handler & Condenser 230v
1.5 Ton | SEER2 22.5 | R-454B | 208/230V
- 18000 BTU cooling capacity
- Up to 22.5 SEER2 rated efficiency
- Uses R-454B refrigerant
- Runs on 208/230V power
Key Specifications
Product Overview
MRCOOL® 18k DIY 5th Generation Mini-split Air Handler & Condenser 230v.
What this system is
- DIY-18-HP-C-230D25-O — MRCOOL® 18k DIY 5th Generation Mini-Split Condenser 230v
- DIY-18-HP-WMAH-230D25-O — MRCOOL® 18k DIY 5th Generation Mini-split Air Handler 230v
Outdoor condenser — DIY-18-HP-C-230D25-O
Tackling an HVAC installation yourself may seem daunting, but the 5th Generation MRCOOL® DIY® 18k BTU 22.5 SEER Ductless Heat Pump Single Zone Mini Split Condenser is built to make the process straightforward and hassle-free. This unit is perfect for heating or cooling spaces ranging from 800 square feet, and is designed specifically for homeowners—no special tools or prior experience needed.
The system comes with a 25-foot Quick Connect® line set, pre-charged with R-454B refrigerant, which means there’s no need to vacuum the lines. This makes the installation process faster, safer, and more affordable.
You’ll enjoy flexible control options, including a handheld remote, the SmartHVAC app for iOS and Android, and compatibility with voice control through Amazon Alexa and Google Assistant. The Follow Me® feature helps maintain your ideal comfort by adjusting the temperature based on where the remote is located. Additionally, the corrosion-resistant Gold Fin® condenser coating is ideal for coastal environments, offering extra durability and extended performance.
With user-friendly features like Auto mode, programmable timers, and automatic restart after power outages, the system is engineered for efficiency and convenience.
The unit is backed by MRCOOL’s industry-leading support: a base warranty that includes 7-year compressor and 5-year parts coverage and eligibility for the MRCOOL® Care Program. It’s an innovative, reliable solution designed to put control and comfort directly in your hands.
- Intertek listed 5031495
- Easy DIY installation
- Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
- Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
- The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
| Model number | DIY-18-HP-C-230D25-O |
|---|---|
| UPC | 840255586962 |
| Series | DIY 5th gen Single-Zone Mini-splits |
| Refrigerant | R-454B |
| Refrigerant charge (oz) | 44.8 |
| Nominal tonnage | 1.5 |
| Cooling capacity (BTU/h) | 18000 |
| Heating capacity (BTU/h) | 18000 |
| SEER2 | 22.5 |
| EER2 | 13.7 |
| HSPF2 (region IV) | 11.5 |
| HSPF2 (region V) | 8.5 |
| Voltage | 208/230 |
| Phase | 1 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 18 |
| Max fuse / breaker (A) | 20 |
| Compressor type | Rotary |
| Inverter | DC |
| Liquid line size (in) | 1/4 |
| Suction line size (in) | 1/2 |
| Line set included (ft) | 25 |
| Max line set length (ft) | 98.4 |
| Sound level (dBA) | 58.5 |
| Colour | White |
| Aux heater included | No |
| Aux heater available | No |
| Wi-Fi capable | Yes |
| AHRI certified | Yes |
| ENERGY STAR certified | Yes |
| UL listed | Yes |
| ETL listed | Yes |
| Parts warranty (years) | 5 |
| Compressor warranty (yrs) | 7 |
| Net W x H x D (in) | 35.04 x 26.5 x 13.46 |
| Net weight (lbs) | 93.48 |
| Shipping W x H x D (in) | 40.55 x 29.53 x 18.11 |
| Shipping weight (lbs) | 114.2 |
Indoor unit — DIY-18-HP-WMAH-230D25-O
The 5th Generation MRCOOL® DIY® 18k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler delivers powerful, energy-efficient heating and cooling for spaces up to 800 sq. ft. Designed for easy, tool-free installation, this system requires no professional experience, specialized tools, or costly service calls—making it a fast and affordable comfort solution for homeowners.
This model features the rugged DIYPRO® cable, which eliminates the need for traditional electrical conduit while offering added durability and protection against outdoor elements, animals, and harsh weather conditions. Installation is not only simplified but also built to last.
You can manage your comfort your way. Use the included wireless remote, connect through the SmartHVAC app available on iOS and Android devices, or control the system using voice commands via Amazon Alexa and Google Assistant. The Gold Fin® condenser coating enhances corrosion resistance, making the unit a great fit for coastal or high-humidity areas.
The system also includes advanced comfort features. Follow Me® technology senses the temperature around the remote and adjusts airflow accordingly, ensuring consistent comfort where you are. Dry Mode reduces humidity for better air quality and comfort.
To protect your investment, MRCOOL® offers a strong 7-year compressor and 5-year parts warranty, and is also eligible for the MRCOOL® Care Program. Experience hassle-free installation, advanced features, and reliable year-round comfort with the MRCOOL® DIY® 18k Mini-Split Air Handler.
- Intertek listed 5031495
- Easy DIY installation
- Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
- Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
- The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.
| Model number | DIY-18-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587044 |
| Series | DIY 5th gen Single-Zone Mini-splits |
| Nominal tonnage | 1.5 |
| Voltage | 208/230 |
| Phase | 1 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 3 |
| Max fuse / breaker (A) | 15 |
| Liquid line size (in) | 1/4 |
| Suction line size (in) | 1/2 |
| Filter type | Reusable |
| Mount type | Wall |
| Max coverage area | 800 sqft |
| Sound level low (dBA) | 19 |
| Sound level high (dBA) | 54.5 |
| Colour | White |
| Aux heater included | No |
| Aux heater available | No |
| Wi-Fi capable | Yes |
| Remote included | Yes |
| AHRI certified | Yes |
| ENERGY STAR certified | Yes |
| UL listed | Yes |
| ETL listed | Yes |
| Parts warranty (years) | 5 |
| Compressor warranty (yrs) | 7 |
| Net W x H x D (in) | 42.52 x 13.19 x 8.9 |
| Net weight (lbs) | 35.49 |
| Shipping W x H x D (in) | 46.73 x 14.29 x 17.68 |
| Shipping weight (lbs) | 49.6 |
Documents
- Specification sheet (DIY-18-HP-C-230D25-O) (PDF)
- Installation manual (DIY-18-HP-C-230D25-O) (PDF)
- Owner's manual (DIY-18-HP-C-230D25-O) (PDF)
- Service manual (DIY-18-HP-C-230D25-O) (PDF)
- Remote manual (DIY-18-HP-C-230D25-O) (PDF)
- Brochure (DIY-18-HP-C-230D25-O) (PDF)
- Warranty (DIY-18-HP-C-230D25-O) (PDF)
- AHRI certificate (DIY-18-HP-C-230D25-O) (PDF)
- EnergyGuide label (DIY-18-HP-C-230D25-O) (PDF)
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
Technical Specifications
Performance
| System Type | Ductless Mini Split |
|---|---|
| Capacity | 18000 BTU |
| Tonnage | 1.5 Ton |
| SEER2 | 22.5 |
| EER2 | 13.7 |
| HSPF2 | 11.5 |
Electrical & Fuel
| Voltage | 208/230V |
|---|---|
| Phase | Single Phase |
| Refrigerant | R-454B |
Shipping & Delivery
Installation video
Published by MRCOOL. Watch the full walkthrough before you start, and follow the installation manual for this model — the video is a guide, not a substitute for it.
Manufacturer Warranty
Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.
Professional Installation Recommended
Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.
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