Customer reviews & Questions
Specification
| Zones | 1 |
| Manufacturer | MRCOOL |
| Manufacturer Part # | DIY-12-HP-WM-115D25-O |
| Type | Mini-Splits |
| BTU Capacity | 12000BTU |
| Max. Coverage Area | 550sqft |
| Tonnage | 1 |
| Refrigerant Compatibility | R454B |
| Number of speeds | 5 |
| Phase | 1 |
| Voltage | 115V |
| Decibel Rating | 54dBA |
| Mount type | Wall |
| Filter Type | Reusable |
| Color | White |
| Features |
|
| Air Handler Dimensions LxWxH | 31.57 x 7.44 x 11.69in |
| Condenser Dimensions L x W x H | 30.12 x 11.93 x 21.85in |
| Warranty | 7-year compressor, 5-year parts |
More MRCOOL products
67 productsMRCOOL DIY 5th Generation 9k BTU Heat Pump Mini Split - Complete System (454B Refrigerant)
Delivery on Jan 28 – Feb 02
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About product
MRCOOL DIY-12-HP-WM-115D25-O is a ductless heat pump mini-split designed for efficient, year-round climate control in spaces up to 550 sq. ft.The 5th Generation MRCOOL DIY line blends performance, durability, and true do-it-yourself installation. A pre-charged 25 ft. Quick Connect line set filled withR-454B refrigerant eliminates special tools and pro installation. The included DIYPRO cable replaces electrical conduit to protect wiring from weather, wildlife, and yardwork.
Multiple control options come standard: a wireless remote, the SmartHVAC app for iOS/Android, and hands-free voice control via Amazon Alexa andGoogle Assistant. After a power outage, the system automatically restores previous settings. A corrosion-resistant gold fin condenser boosts longevity—ideal for coastal environments—whileFollow Me temperature sensing and Dry mode fine-tune comfort and humidity. MRCOOL backs the system with a limited lifetime warranty, plus7 years on the compressor and 5 years on parts.
With its 12K BTU capacity, this system delivers dependable heating and cooling for rooms up to 550 sq. ft. The environmentally forward R-454B refrigerant modernizes performance versus older blends.
The pre-charged Quick Connect line set streamlines installation—no vacuum pump required. The DIYPRO cable replaces traditional conduit for a cleaner, more durable setup.
A gold fin condenser improves corrosion resistance in humid or coastal areas. Auto-restart ensures comfort resumes seamlessly after power interruptions.
Control from anywhere with the SmartHVAC app, or go hands-free with Alexa and Google Assistant. Follow Me uses the remote’s location for targeted temperature control, and Dry mode reduces excess humidity.
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90 productsMRCOOL Mini Split Systems For Sale
MRCOOL mini split systems offer the industry's first truly DIY-friendly ductless solution that eliminates professional installation costs. With innovative pre-charged line sets and quick-connect technology, homeowners can achieve professional-grade climate control at a fraction of conventional costs.
MRCOOL mini splits use patented pre-charged refrigerant line sets that eliminate vacuum pumps, refrigerant certification, or specialized HVAC tools. This is the only ductless mini-split system designed for amateur installation, featuring R-454B pre-charged lines and quick-connect fittings.
$2,500
Average Savings
2-4 Hours
Install Time
7 Years
Warranty
Premium DIY line with 9,000-36,000 BTU capacity and up to 20.5 SEER2 efficiency. Includes 7-year compressor and 5-year parts warranty, 25-foot pre-charged line sets, and Wi-Fi connectivity.
Entry-level option with 9,000-24,000 BTU capacity, 16-foot line sets, and 2-year parts/1-year compressor warranty. Best for budget-conscious homeowners.
Requires professional installation but offers competitive pricing. No pre-charged line sets - traditional refrigerant handling required.
General rule: 20 BTUs per square foot, but adjust for ceiling height (+10-20% for high ceilings), insulation quality (+25-30% for poor insulation), and window exposure (+10-15% for south-facing windows).
Example: 500 sq ft room with 10-foot ceilings and south windows = 10,000 BTU base + 2,000 BTU (high ceiling) + 1,000 BTU (sun exposure) = 13,000 BTU total requirement.
✅ Choose DIY If:
🔧 Choose Professional If:
❄️ Heating Performance: MRCOOL systems operate reliably down to -15°F, suitable for most U.S. climate zones.
"I have installed dozens of MRCOOL systems and encountered very few problems. Issues often stem from poor installation rather than product defects."
- Licensed HVAC Professional
🔧 Monthly: Clean air filters
Quarterly: Clear outdoor unit debris
Annually: Professional coil cleaning
Ready to Find Your Perfect MRCOOL Mini Split?
Explore our complete selection of DIY-friendly ductless mini splits with pre-charged line sets, 7-year warranties, and professional-grade performance at unbeatable prices.
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