MRCOOL® DIY® Hyper Heat 12,000 BTU (1 Ton) Single-Zone Mini Split System — DIYHH-12-HP-C-230D25-O + DIYCASSETTE12HP-230D25-O
Overview
This single-zone system listing pairs the MRCOOL® DIY® Hyper Heat 12K condenser with the DIY® OuttaSight® 12K one-way ceiling cassette for discreet, modern comfort. The included 25-foot DIY® QuickConnect® line set comes pre-charged with R-454B to streamline installation and help avoid vacuuming and refrigerant handling. Hyper Heat capability lists minimum ambient operation down to -22°F for both heating and cooling.
Highlights
- Indoor unit and condenser: Includes the condenser and the OuttaSight® one-way cassette air handler.
- DIY-friendly setup: 25ft QuickConnect® line set (pre-charged R-454B) plus DIYPRO® cable.
- Cold-weather performance: Minimum ambient listed as -22°F for both heating and cooling.
- Smart control: Remote + SmartHVAC app (iOS/Android) + Alexa/Google voice control.
- Ceiling cassette design: Installs flush between 16" joists for a clean, low-profile look.
- Durability: Gold Fin® condenser coating for corrosion resistance.
350–550 sq ft
25 ft included
12,000 / 12,000 BTU
-22°F (Heat/Cool)
Coverage varies by climate, insulation, and load. Sizing by Manual J is recommended.
What’s Included
- Outdoor Condenser: DIYHH-12-HP-C-230D25-O
- Indoor Air Handler (Ceiling Cassette): DIYCASSETTE12HP-230D25-O (OuttaSight® One-Way)
- DIY® QuickConnect® Line Set: 25 ft (pre-charged with R-454B)
- DIYPRO® Cable
- Wireless Remote Control
- Documentation (see Documents & Downloads)
Indoor Specs
Model: DIYCASSETTE12HP-230D25-O (DIY® OuttaSight® 1-Way Ceiling Cassette)
| Mount Type | Ceiling • 1-Way Airflow |
| Max Coverage | Up to 550 sq ft |
| Airflow (CFM) | 353 / 312 / 283 / 247 / 177 |
| Sound | 37 dB(A) • Low 24 • High 41 |
| WiFi / App | Yes / Yes (SmartHVAC) |
| Voice Control | Amazon Alexa / Google Assistant |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| Max Fuse / Breaker | 15A |
| Min Circuit Ampacity | 3A |
| Refrigerant | R-454B |
| Line Sizes | Liquid 1/4" • Suction 3/8" |
| Filter | Reusable |
| Dimensions (W×D×H) | 50.31" × 13.19" × 8.98" |
| Weight | 45 lb |
| GTIN / UPC | GTIN 00840255587518 • UPC 840255587518 |
| Restricted States | GU; PR; VI |
| Proposition 65 | Yes |
Outdoor Specs
Model: DIYHH-12-HP-C-230D25-O (DIY® Hyper Heat Condenser)
| Equipment Type | Condenser |
| Cooling / Heating Capacity | 12,000 / 12,000 BTU |
| Recommended Coverage | 350–550 sq ft |
| SEER2 / EER2 | 23.5 / 12.8 |
| HSPF2-4 / HSPF2-5 | 10.0 / 8.0 |
| Inverter | Yes |
| Sound | 56.5 dB(A) |
| Minimum Ambient (Cooling) | -22°F |
| Minimum Ambient (Heating) | -22°F |
| Electrical | 208–230V • 1-Phase • 60 Hz |
| MCA / Max Breaker | 15A / 15A |
| Refrigerant | R-454B • 32.1 oz |
| Line Set Included | Yes • 25 ft |
| Max Line Set Length | 75 ft |
| Line Sizes | Liquid 1/4" • Suction 3/8" |
| Compressor | Rotary |
| Metering Device | EEV |
| Dimensions (W×D×H) | 31.69" × 12.99" × 21.81" |
| Weight | 72.31 lb |
| GTIN / UPC | GTIN 00840255588102 • UPC 840255588102 |
| Restricted States | GU; PR; VI |
| Proposition 65 | Yes |
Documents & Downloads
- Outdoor (DIYHH-12-HP-C-230D25-O)
- Indoor (DIYCASSETTE12HP-230D25-O)
The Warranty URLs repeat because both indoor and outdoor data include the same warranty documents.
Important
- DIY install workflow: Designed to use the QuickConnect® line set (pre-charged) to simplify commissioning.
- Line length: 25 ft included; max line set length listed is 75 ft for the condenser.
- Cold-weather operation: Minimum ambient listed as -22°F for both heating and cooling.
FAQs
Which indoor unit is included with this system?
This system pairs the DIYCASSETTE12HP-230D25-O (DIY® OuttaSight® 12K one-way ceiling cassette) with the DIYHH-12-HP-C-230D25-O outdoor unit.
Does it include the line set?
Yes. The outdoor unit listing specifies a 25 ft QuickConnect® line set is included.
What controls are supported?
Control options include a wireless remote, SmartHVAC app (iOS/Android), and Amazon Alexa / Google Assistant voice control.
How cold can it operate?
Minimum ambient heating and cooling are both listed as -22°F.
