Product overview
MRCOOL DIY 12K BTU 5th Gen Ductless Mini Split Air Handler - 115V
Upgrade your space with the 5th Generation MRCOOL DIY 12K BTU Ductless Heat Pump Single Zone Mini-Split Air Handler. This system is designed for straightforward, tool-free installation, with no special skills required, and provides efficient heating and cooling for areas up to 550 sq. ft. The pre-charged 25-foot DIY® QuickConnect® line set, filled with R-454B refrigerant, eliminates the need for vacuuming, saving you time, effort, and installation costs.
Plus, the included DIYPRO® cable enhances durability by removing the need for electrical conduit, protecting against outdoor elements and wildlife. Take control your way—whether with the wireless remote, the SmartHVAC app for Apple and Android, or hands-free voice commands via Amazon Alexa and Google Assistant. The Gold Fin® Condenser also provides enhanced corrosion resistance, making it an excellent choice for coastal environments. Designed with your comfort in mind, the system’s wireless remote features Follow Me technology, allowing the air handler to adjust based on the remote’s location for personalized comfort. Dry Mode adds another layer of convenience by reducing humidity and preventing excess condensation. With industry-leading warranties, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, you can trust in long-lasting performance. Experience an easier installation, smart technology, and year-round comfort with the 5th Generation MRCOOL DIY.
Product Specifications:
| BRAND NAME | MRCOOL |
| SERIES | DIY 5th gen Single-Zone Mini-splits |
| MODEL | DIY-12-HP-WMAH-115D25-O |
| GTIN | 840255587006 |
| UPC | 840255587006 |
| SHORT DESCRIPTION | MRCOOL® 12k DIY 5th Generation Mini-split Air Handler 115v |
| TONNAGE | 1 |
| VOLTAGE (V) | 115 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 15 |
| MIN CIRCUIT AMPACITY (A) | 3 |
| MOUNT TYPE | Wall |
| COLOR | White |
| MAX COVERAGE AREA | 550 sqft |
| DECIBEL RATING LOW (DBA) | 18 |
| DECIBEL RATING HIGH (DBA) | 43 |
| NUMBER OF SPEEDS | 5 |
| OSCILLATION | Yes |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | 3/8 |
| FILTER TYPE | Reusable |
| AUXILIARY HEATER INCLUDED | No |
| AUXILIARY HEATER AVAILABLE | No |
| FAN ONLY OPTION | Yes |
| QUIET MODE | Yes |
| AUTO COOL | Yes |
| WIFI COMPATIBILITY | Yes |
| APP COMPATIBILITY | Yes |
| WORKS WITH IOS | Yes |
| WORKS WITH ANDROID | Yes |
| REMOTE CONTROL INCLUDED | Yes |
| UL LISTED | Yes |
| ETL LISTED | Yes |
| ENERGY STAR CERTIFIED | Yes |
| AHRI CERTIFIED | Yes |
| REGISTERED WARRANTY | Extended Limited Lifetime* |
| BASE PARTS WARRANTY | 5 |
| BASE COMPRESSOR WARRANTY | 7 |
| HAS BATTERIES | Yes |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS AEROSOL | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| NET DEPTH (IN) | 7.44 |
| NET HEIGHT (IN) | 11.69 |
| NET WIDTH (IN) | 31.57 |
| NET WEIGHT (LBS) | 24.91 |
| GROSS DEPTH (IN) | 16.34 |
| GROSS HEIGHT (IN) | 14.37 |
| GROSS WIDTH (IN) | 36.02 |
| GROSS WEIGHT (LBS) | 35.49 |
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 | 12K BTU |
|---|---|
| Coverage area | 550 Sq Ft. |
| Zones / rooms | 1 Zone |
| Mount type | Wall |
| Installation | DIY |
| Brand | MRCOOL |
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.
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Every step, start to finish — most homeowners wrap a single zone in a weekend.
