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)
- Brochure (EN)
- Installation & User Manual (EN)
- Performance / Specs (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
- Indoor (DIYCASSETTE12HP-230D25-O)
- Brochure (EN)
- Installation & User Manual (EN)
- Performance / Specs (EN)
- Remote Manual (EN)
- Service Manual (EN)
- Warranty (EN)
- AHRI Certificate (PDF)
- EnergyGuide (PDF)
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.
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We will prepare your order within 24 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION: Please be kindly informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery. To AVOID delays, please check if the provided phone number in the order details is a current number where you can be reached. You can also contact the carrier directly and refer to your tracking number to set up a date and time for your appointment. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. PLEASE verify your shipping address, as changes to the address after freight has shipped can result in an additional 15% or higher fee depending on freight weight and dimensions.
SMALLWARES INFORMATION: Please be informed that for smaller items, such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves, when these items are ordered individually, they may be shipped via FedEx without a signature requirement. It is your responsibility to ensure a safe and secure environment for delivery. Please note that we cannot be held liable for any packages that are stolen or lost after delivery has been confirmed. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING: Please inspect your boxes thoroughly when you receive them. They should arrive shrink-wrapped and on a pallet. If you notice any damages or imperfections (e.g. crushed box or forklift hole), please write comments on the receipt before signing for delivery, no matter how small damages seem. Contact us immediately to assist you.
Shipping & Delivery
We will prepare your order within 24–48 hours if it’s received on a weekday (before noon). Orders are shipped in one to two business days. Transit time is between 3 to 6 business days, although exceptions apply. We email tracking information once your purchase is shipped.
Delivery Map
IMPORTANT DELIVERY INFORMATION
Please be informed that this air conditioner, due to its weight and shipping restrictions, is shipped palletized with an arranged freight service and requires an appointment for delivery.
To AVOID delays, please make sure the phone number in your order details is accurate and one where you can be reached. You may also contact the carrier directly using your tracking number to schedule your delivery.
It is your responsibility to ensure a safe and secure delivery environment. We are not liable for any packages that are stolen or lost after delivery is confirmed.
Please verify your shipping address carefully. Changes to your shipping address after the freight has been shipped may result in additional fees of 15% or more, depending on freight weight and dimensions.
SMALLWARES INFORMATION
Smaller items such as Installation Kits, Smart Connectivity Dongles, and TTW Sleeves may be shipped via FedEx without a signature requirement if ordered individually.
It is your responsibility to ensure a safe delivery location. We are not liable for packages lost or stolen after delivery confirmation. Thank you for your understanding and cooperation.
INSPECT YOUR MERCHANDISE BEFORE SIGNING
Please inspect your boxes carefully upon delivery. Shipments should arrive shrink-wrapped and on a pallet. If you notice any damage or signs of mishandling (such as a crushed box or forklift puncture), write comments on the delivery receipt before signing, even if the damage appears minor.
Contact us immediately if any issues arise so we can assist you promptly.
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