Description
Description
MRCOOL DIY Select 9K BTU 115V Mini Split System with Black Air Handler and 11.5 ft Line Set
Product Description
The MRCOOL DIY Select 9K BTU Mini Split System provides efficient heating and cooling for spaces up to 400 square feet. Its sleek black wall-mounted air handler offers a modern alternative to traditional white units, making it ideal for garages, studios, offices, bedrooms, and upgraded living spaces.
Designed for DIY installation, the system includes a Quick Connect pre-charged line set containing R-454B refrigerant. No vacuum pump, gauges, or specialized HVAC tools are required. The system can also be controlled through the MRCOOL app or by voice commands using Alexa or Google Assistant.
- Provides 9,000 BTU of heating and cooling
- Covers spaces up to 400 square feet
- Black wall-mounted air handler provides a clean, modern appearance
- Designed for DIY installation without specialized HVAC tools
- Pre-charged Quick Connect line set included
- Operates on 115V power
- 17.5 SEER2 energy efficiency rating
- Smart app and voice control
- Compatible with Alexa and Google Assistant
- Ultra-quiet operation
- Gold Fin protection
- Heat pump system provides year-round heating and cooling
Specifications
| Specification | Details |
|---|---|
| Brand | MRCOOL |
| Series | DIY Select 1st Gen |
| Model/SKU | DIYS-09-HP-B-115A11-O |
| System Type | Single-zone ductless mini split heat pump |
| Cooling Capacity | 9,000 BTU |
| Heating Capacity | 9,000 BTU |
| Coverage Area | Up to 400 sq. ft. |
| Indoor Unit Color | Black |
| Voltage | 115V |
| SEER2 | 17.5 |
| HSPF2 | 8.8 |
| Refrigerant | R-454B |
| Minimum Circuit Ampacity | 17A |
| Recommended Breaker | 20A |
| Maximum Fuse/Breaker | 20A |
| Line Set | 11.5 ft pre-charged line set |
| DIYPRO Cable | 13 ft |
| Control Options | Remote control, MRCOOL app, Alexa, and Google Assistant |
| Compressor Warranty | 2 years |
| Parts Warranty | 1 year |
| Remote Warranty | 1 year |
Always size the electrical circuit according to the condenser specifications rather than the air handler.
What’s In The Box?
- Outdoor condenser
- Black wall-mounted air handler
- 11.5 ft pre-charged line set
- 13 ft DIYPRO cable
- Remote control
- Installation hardware
FAQs
Can I install this MRCOOL mini split myself?
Yes. The system is designed for DIY installation and does not require a vacuum pump, gauges, or specialized HVAC tools.
What size space can this system heat and cool?
It is designed to cover spaces up to 400 square feet.
What breaker size does this mini split require?
The page recommends a 20-amp breaker on a 115V circuit. The minimum circuit ampacity is 17A, and the maximum fuse or breaker size is 20A.
Does the system provide both heating and cooling?
Yes. It is a heat pump system rated for 9,000 BTU of heating and 9,000 BTU of cooling.
Can the mini split be controlled from a smartphone?
Yes. It supports control through the MRCOOL app and voice commands using Alexa or Google Assistant.

















