Introducing the MrCool DIY 3rd Generation 18k BTU 20 SEER Wall Mounted Ductless Heat Pump Split System. This is a ductless mini-split heat pump with enhanced WIFI, engineered to make setup not only quick and easy, but the MRCOOL DIY Energy Star Series is flexible enough to be installed virtually anywhere without requiring specialized tools or expensive equipment. The 18,000 BTU unit is 20 SEER and designed to heat and cool up to 750 square feet efficiently and effectively.
The MrCool SmartHVAC app is compatible with Amazon Alexa and Google assistant. You can also control your DIY anywhere with your Apple or Android smart device with an Internet connection.
Doing it yourself has never been easier with the new MRCOOL DIY 3rd Generation Energy Star Series. This unit is shipped in two boxes.
Take full control of your home comfort with the 3rd Generation MrCool DIY 18k BTU Ductless Heat Pump Mini Split System. This full heating and cooling system can be installed in just a few hours.
The key to the 3rd Generation MrCool DIY 18k BTU 20 SEER Ductless Heat Pump Mini Split System's easy installation capability is the pre-charged Quick Connect line set — MrCool's cutting-edge technology that makes setup safe, simple, and cost-effective. The line set uses the environmentally friendly, and chlorine-free refrigerant R-410A, which is an alternative to old refrigerant that won't damage the ozone layer.
But what if your new MrCool ductless mini-split runs low on that same R-410A refrigerant? Not to worry, an alert will appear on your indoor unit to let you know so you can address issues before they cause costly damage.
Should a power outage occur, the 3rd Generation MrCool DIY 18k BTU 20 SEER Ductless Heat Pump Mini Split System will auto-start once power returns, making your home comfortable as soon as possible.
The MrCool indoor wall unit also displays alerts when the air handler filter needs cleaning or replacement. With this feature, you can trust the air you breathe is always fresh! The cleaning alert displays after 240 hours of operation and filter replacement is suggested after nearly 3,000 hours of run time.
The outdoor MrCool mini-split condenser can be anchored to the ground or attached to a wall with a bracket. The outdoor unit is 34 inches wide, 28 inches tall, and 15 inches deep, while the mounting dimensions are 20.24 inches wide by 13.39 inches deep.
The 3rd Generation MrCool DIY 18k BTU 20 SEER Ductless Heat Pump Mini Split System can handle a wide range of outdoor temperatures, as low as 5°F and as high as 122°F, and its heating range indoors is from 32°F to 86°F. In the summer, keep your home cool and to your liking with a cooling range of 63°F to 90°F. Plus, with the auto, sleep, and timer modes you can customize your system to run to your preferences and keep your HVAC running efficiently; saving money.
When the 3rd Generation MrCool DIY mini split is in COOL, DRY, or AUTO mode, an anti-mildew function activates and keeps a low fan running for about 10 minutes with low airflow to dry up condensation that can cause mildew growth. The unit also runs quietly and smoothly so you can trust it will work without any noisy interruptions while it keeps your air clean and at just the right temperature.
Want exact control? You can control the MrCool DIY 3rd Generation 18k BTU 20 SEER Wall Mounted Ductless Heat Pump Split System wirelessly with the included remote, Google Assistant, Amazon Alexa, or an app from your Apple or Android device.
Get custom performance from your ductless MrCool mini split system with the FOLLOW ME feature, an option for your maximum comfort that will track the air temperature around you as long as you keep the remote nearby.
FEATURES
The only ductless air conditioning and heating unit that is easy to install for thousands less than a conventional HVAC system. Mr Cool DIY 18k Ductless Mini Split heat pump even adjusts the temperature to the perfect degree wherever you are in your room.
- EASY DIY INSTALLATION A pre-charged R410 quick connect DIY lineset allows you to install this innovative ductless system without special tools, equipment, or training.
- FOLLOW ME Personalized Performance for wherever you are in the room. Keep the remote close by, and MRCOOL DIY will track the air temperature around you to ensure you receive maximum comfort.
- LOW AMBIENT COOLING Cool all the way down to 5°F. Maintain cooling even when the outside temperature reaches 5 degrees. This feature makes the MRCOOL DIY the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.
- AUTO RESTART No need to worry if there's a power outage. The MrCool DIY auto restart will have the unit running again in no time.
- GOLD FIN CONDENSER Live on the coast? Not a problem, the MrCool condenser is built to resist long term corrosion.
- REMOTE APP WIFI CONTROL Control your DIY anywhere with your Apple or Android smart device and internet connection.
- TEMPERATURE COMPENSATION The MrCool temperature compensation technology help keeps you comfortable in all weather conditions.
- LEAKAGE DETECTION When the MRCOOL DIY detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain comfort in your indoor environment.
- LOUVER POSITION MEMORY The louver will automatically move to the same position as you set last time the unit was turned on.
*Free MRCOOL Heavy Duty Tool Kit w/ Tools ($70 Value)*

- Tool Bag w/ 27 Pockets
- Crescent Wrench Set
- Hole Saw with Arbor
Unit Specifications
Model | DIY-18-HP-230B25 |
---|---|
UPC | 810512033515 |
AHRI Number | 204711123 |
Bundle Avg Coverage Area | 750 - 900 Sq Ft |
Bundle Cooling Capacity | 1.5 Ton |
Bundle Cooling Efficiency | 19 SEER and Above |
EER | 12.5 |
Heat Pump Efficiency (HSPF) | 10 |
Series | DIY |
Zones | 1 |
Region Compatibility | Nationwide |
Popular Applications | Game Room, Garage, Guest Room, Man Cave, Server Room, Sunroom |
California Residents | see Prop 65 WARNING |
DIY-18-HP-C-230B Specifications:
Model | DIY-18-HP-C-230B |
---|---|
UPC | 810512033430 |
Avg Coverage Area | 750 - 900 Sq Ft |
Compressor | Inverter |
Cooling Capacity | 1.5 Ton |
Electrical Phase | 1-Phase |
Heat Pump Efficiency (HSPF) | 10 |
Line Set Connection Type | Quick Connect |
Liquid Line Size | 1/4 inch |
Max Overcurrent Protection | 20 amps |
Primary Heating Capacity | 15,001 - 20,000 BTU |
Product Height (in) | 27.64 |
Product Length (in) | 14.29 |
Product Width (in) | 33.27 |
Cooling Efficiency | 19 SEER and Above |
Series | DIY |
System Application Type | Ductless Split Systems |
Voltage | 240 |
Warranty | 5 Year Parts, 7 Year Compressor |
Weight (lbs) | 122.3600 |
Region Compatibility | Nationwide |
DIY-18-HP-WMAH-230B Specifications:
Model | DIY-18-HP-WMAH-230B |
---|---|
UPC | 810512033478 |
Air Flow Direction | Horizontal |
Configuration | Wall Mounted |
Blower Motor | Variable Speed |
Cooling Capacity | 1.5 Ton |
Electrical Phase | 1-Phase |
Line Set Connection Type | Quick Connect |
Liquid Line Size | 1/4 inch |
Max Overcurrent Protection | 20 amps |
Product Height (in) | 13.19 |
Product Length (in) | 8.9 |
Product Width (in) | 42.52 |
Series | DIY |
Special Features | WiFi Capable |
Suction Line Size | 1/2 inch |
System Application Type | Ductless Split Systems |
Voltage | 240 |
Warranty | 5 Year Parts, 7 Year Compressor |
Weight (lbs) | 54.0100 |
In stock items: Products typically ship within 2-3 business days from when you place your order (Please allow 5-7 business days for some MRCOOL products to ship). Due to COVID-19 please allow 7 - 10 days for your order to arrive once you have received shipping confirmation.
Pre-order/Out of stock items: Contact us for estimated shipping timeline. We are experiencing inventory and re-stocking delays due to port congestion. We appreciate your patience and understanding.
High order volume due to COVID-19 may occasionally slow delivery for some items and you may experience extended wait times contacting our Customer Service team.
For the fastest service and online support, please email us at support@airsanctuary.com for information regarding your order.
Read the rest of our shipping policy here.