Product overview
MRCOOL DIY 18,000 BTU 5th Gen Hyper Heat Single Zone Mini Split System - 230V
Experience year-round comfort with the MRCOOL® DIY® 18k BTU 208/230V Hyper Heat 21.2 SEER Ductless Heat Pump Single Zone Mini Split Condenser—a high-performance solution designed for easy installation without the need for professional tools or experience. Perfect for spaces ranging from 500-800 sq. ft. The Hyper Heat model can continue heating down to -22 degrees.
This system is compatible with both our stylish wall-mounted air handlers and the discreet DIY® OuttaSight® Ceiling Cassette. Installation is quick and hassle-free, thanks to the 25-foot DIY® Quick Connect® line set, which comes pre-charged with eco-friendly R-454B refrigerant. No vacuum pump or gauges required. The included DIYPRO® cable adds extra durability, offering protection against outdoor elements, animals, and everyday wear. Control your comfort effortlessly with several convenient options: a handheld remote, the SmartHVAC mobile app for Apple and Android, or hands-free voice commands via Amazon Alexa and Google Assistant. The Gold Fin® condenser coating helps resist corrosion, making it a dependable option even in coastal climates. Advanced features enhance both convenience and efficiency. Auto-Restart resumes unit function after a power outage, Timer allows for customized operation based on your schedule, and Sleep maximizes energy usage while you sleep.
For ultimate peace of mind, the MRCOOL® DIY® 18k BTU Hyper Heat Single Zone Mini Split includes a 7-year compressor and 5-year parts warranty following online registration. Give yourself additional protection with enrollment in the MRCOOL® Care Program, which includes a limited lifetime replacement program and an annual care kit for lasting performance and confidence.
Installation & Guides:
MRCOOL DIY Hyper Heat Brochure
MRCOOL DIY Hyper Heat Install Manual
MRCOOL DIY Hyper Heat Warranty Information
Specifications:
| BRAND NAME | MRCOOL |
| SERIES | DIY Hyper Heat |
| MODEL |
DIYHH-18-HP-C-230D25-O
|
| GTIN | 840255588096 |
| UPC | 840255588096 |
| UNIT TYPE | Mini-Split |
| EQUIPMENT TYPE | Condenser |
| SHORT DESCRIPTION |
DIY 5th Gen - R454B - 18K Hyper Heat BTU 230V Condenser w/ 25ft Install Kit
|
| WORKS WITH |
DIYCASSETTE18HP-230D25-O DIY-18-HP-WMAH-230D25-O
|
| SEER2 | 21.2 |
| EER2 | 12.5 |
| HSPF2-4 | 11 |
| HSPF2-5 | 8.5 |
| CFM | 1765.8 |
| TONNAGE | 1.5 |
| COOLING CAPACITY (BTU) | 18000 |
| HEATING CAPACITY (BTU) | 18000 |
| VOLTAGE (V) | 208/230 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 25 |
| MIN CIRCUIT AMPACITY (A) | 19 |
| COLOR | White |
| MAX COVERAGE AREA | 800 |
| REFRIGERANT TYPE | R-454B |
| REFRIGERANT VOLUME (OZ) | 52.21 |
| DECIBEL RATING (DBA) | 58 |
| 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 | 1/2 |
| COMPRESSOR MOTOR TYPE | Rotary |
| CONDENSER FAN MOTOR RPM | 780/700/550 |
| 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) | 13.46 |
| NET HEIGHT (IN) | 26.5 |
| NET WIDTH (IN) | 35.04 |
| NET WEIGHT (LBS) | 99.87 |
| GROSS DEPTH (IN) | 18.11 |
| GROSS HEIGHT (IN) | 29.53 |
| GROSS WIDTH (IN) | 40.55 |
| GROSS WEIGHT (LBS) | 120.15 |
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 | 18,000 |
|---|---|
| Indoor unit(s) | 18K |
| Coverage area | 800 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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Every step, start to finish — most homeowners wrap a single zone in a weekend.
