Product overview
MRCOOL DIY 12,000 BTU 23.5 SEER2 5th Gen Hyper Heat Single Zone Mini Split System - 230V
The MRCOOL® DIY® 12K BTU 208/230V Hyper Heat 23.5 SEER Ductless Heat Pump Single Zone Mini Split Condenser delivers powerful, high-efficiency climate control with simple do-it-yourself installation—no special tools, training, or professional assistance required. It’s ideal for heating and cooling spaces between 350–550 sq. ft. It is compatible with both our sleek wall-mounted air handlers and the low-profile DIY® OuttaSight® Ceiling Cassette. Installation is fast and straightforward thanks to the 25-foot DIY® QuickConnect® line set, filled with environmentally-friendly R-454B refrigerant, eliminating the need for vacuuming or handling refrigerant. This system can continue heating down to -22 degrees.
The included DIYPRO® cable enhances system protection, replacing traditional electrical conduit to guard against weather, pests, and yard work damage. Enjoy flexible control with multiple options: the included remote, the SmartHVAC app for iOS and Android devices, or voice control through Amazon Alexa and Google Assistant. The corrosion-resistant Gold Fin® condenser coating is designed for durability, making it ideal for both inland and coastal environments.
This system is loaded with smart features, including Auto-Restart to maintain continuity of comfort after power loss, a programmable Timer to correspond to your schedule, and the Sleep function, which increases efficiency while you sleep. For peace of mind, the unit includes a limited lifetime replacement and annual care kit with enrollment in the MRCOOL® Care Program, and comes standard with a 7-year compressor and 5-year parts warranty with online product registration. Enjoy dependable, hassle-free comfort year-round with The MRCOOL® DIY® 12K BTU Hyper Heat Single Zone Mini Split Condenser.
Installation & Guides:
MRCOOL DIY Hyper Heat Brochure
MRCOOL DIY Hyper Heat Install Manual
MRCOOL DIY Hyper Heat Warranty Information
Condenser Specifications:
| BRAND NAME | MRCOOL |
| SERIES | DIY Hyper Heat |
| MODEL |
DIYHH-12-HP-C-230D25-O
|
| GTIN | 840255588102 |
| UPC | 840255588102 |
| UNIT TYPE | Mini-Split |
| EQUIPMENT TYPE | Condenser |
| SHORT DESCRIPTION |
DIY 5th Gen - R454B - 12K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
|
| WORKS WITH |
DIYCASSETTE12HP-230D25-O DIY-12-HP-WMAH-230D25-O
|
| SEER2 | 23.5 |
| EER2 | 12.8 |
| HSPF2-4 | 10 |
| HSPF2-5 | 8 |
| CFM | 1471.5 |
| TONNAGE | 1 |
| COOLING CAPACITY (BTU) | 12000 |
| HEATING CAPACITY (BTU) | 12000 |
| VOLTAGE (V) | 208/230 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 15 |
| MIN CIRCUIT AMPACITY (A) | 15 |
| COLOR | White |
| MAX COVERAGE AREA | 550 |
| REFRIGERANT TYPE | R-454B |
| REFRIGERANT VOLUME (OZ) | 32.1 |
| DECIBEL RATING (DBA) | 56.5 |
| INVERTER | Yes |
| MIN AMBIENT COOL (F) | -22 |
| MIN AMBIENT HEAT (F) | -22 |
| LINESET INCLUDED | Yes |
| LINE SET LENGTH | 25ft |
| MAX LINESET LENGTH (FT) | 75 |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | 3/8 |
| COMPRESSOR MOTOR TYPE | Rotary |
| CONDENSER FAN MOTOR RPM | 780/680/580 |
| METERING DEVICE | EEV |
| UL LISTED | Yes |
| CSA CERTIFIED | Yes |
| ETL CERTIFIED | Yes |
| ENERGY STAR CERTIFIED | Yes |
| AHRI CERTIFIED | Yes |
| REGISTERED WARRANTY |
7-Years Compressor, 5-Years Parts
|
| BASE WARRANTY | 5-Years Parts |
| BASE PARTS WARRANTY | 5 Years |
| BASE COMPRESSOR WARRANTY | 7 Years |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| RESTRICTED STATES | GU;PR;VI |
| NET DEPTH (IN) | 12.99 |
| NET HEIGHT (IN) | 21.81 |
| NET WIDTH (IN) | 31.69 |
| NET WEIGHT (LBS) | 72.31 |
| GROSS DEPTH (IN) | 14.57 |
| GROSS HEIGHT (IN) | 24.21 |
| GROSS WIDTH (IN) | 36.02 |
| GROSS WEIGHT (LBS) | 79.59 |
Air Handler Specifications:
| BRAND NAME | MRCOOL |
| SERIES |
DIY 5th gen Multi-Zone Mini-splits
|
| MODEL |
DIY-12-HP-WMAH-230D25-O
|
| GTIN | 840255587037 |
| UPC | 840255587037 |
| SHORT DESCRIPTION |
MRCOOL® 12k DIY 5th Generation Mini-Split Air Handler 230v
|
| VOLTAGE (V) | 208/230 |
| PHASE | 1 |
| CYCLE | 60 |
| MOUNT TYPE | Wall |
| COLOR | White |
| MAX COVERAGE AREA | 550 sqft |
| OSCILLATION | Yes |
| 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 |
| 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) | 11.63 |
| NET WIDTH (IN) | 31.57 |
| NET WEIGHT (LBS) | 24.47 |
| GROSS DEPTH (IN) | 16.34 |
| GROSS HEIGHT (IN) | 14.37 |
| GROSS WIDTH (IN) | 36.02 |
| GROSS WEIGHT (LBS) | 35.05 |
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 | 12,000 |
|---|---|
| Indoor unit(s) | 12K |
| Coverage area | 600 Sq Ft. |
| Zones / rooms | 1 Zone |
| Power | 230 Volt |
| Line set | Custom |
| Mount type | Wall |
| Installation | DIY Installation |
| 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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Watch the full DIY install
Every step, start to finish — most homeowners wrap a single zone in a weekend.
