MRCOOL DIY 5th Gen 12K Hyper Heat BTU 230v Condenser w/ 25ft Install Kit

MRCOOL DIY 5th Gen 12K Hyper Heat BTU 230v Condenser w/ 25ft Install Kit

The MRCOOL DIY 5th Gen 12K Hyper Heat BTU 230v Condenser w/ 25ft Install Kit provides powerful and efficient year‑round comfort for homes, cabins, offices, and other spaces up to approximately 500–550 sq ft. Part of MRCOOL’s 5th Generation DIY mini split lineup, this condenser delivers both cooling and reliable Hyper Heat performance even in extreme cold, maintaining heating capability down to around ‑22°F. Its 12,000 BTU capacity is ideal for single‑zone applications where dependable temperature control is essential.

Designed for simplicity and convenience, the unit includes a pre‑charged 25‑ft QuickConnect® line set, eliminating the need for vacuum pumps, nitrogen, or specialized HVAC tools during installation. The condenser works seamlessly with compatible DIY wall‑mounted air handlers or ceiling cassette indoor units to create a complete climate system with intuitive control options via the SmartHVAC app and voice assistants when paired with compatible indoor components.

Built for durability, the outdoor condenser features Gold Fin® corrosion‑resistant construction suitable for both coastal and inland environments. Its inverter‑driven rotary compressor provides smooth, quiet operation with high efficiency, giving homeowners the flexibility to install and enjoy advanced heating and cooling without professional HVAC assistance.

Reliable and efficient across a wide range of conditions, the MRCOOL Hyper Heat condenser comes with industry-standard warranties, including multi‑year compressor and parts coverage, making it a dependable choice for long-term year‑round comfort in small to medium spaces.

Features

• Hyper Heat performance: Reliable heating down to -22°F
• 23.5 SEER2 & 10 HSPF2: Ultra-efficient year-round comfort
• R-454B Refrigerant: Lower GWP, next-generation eco solution
• DIY Quick Connect®: No vacuum pump, nitrogen, or special HVAC tools
• Gold Fin® Anti-Corrosion: Built for coastal and harsh climates
• Smart control: App, Wi-Fi, Alexa, Google Assistant
• OuttaSight® cassette compatible: Cleanest ceiling installation style
• Silent rotary inverter compressor: Smooth operation, low noise
• DIYPRO® cable included: Replaces conduit and protects wiring
• MRCOOL Care lifetime replacement program available

Specifications 

 All specifications are preliminary and are subject to change during mass production.

WORKS WITH:
✔ DIY-12-HP-WMAH-230D25-O Wall Mounted Air Handler
✔ DIYCASSETTE12HP-230D25-O OuttaSight® Ceiling Cassette

What's Included

✔ DIYHH-12-HP-C-230D25-O   DIY 5th Gen - R454B - 12K Hyper Heat BTU 230V Condenser.

✔ DIY25-1438-O   25ft 1/4 x 3/8 Line set for DIY 6K, 9K & 12K Indoor - R454B

Frequently Asked Questions & Answers 

What's the difference between the 5th Gen and 4th Gen?

The 5th Gen MRCOOL® DIY® Mini Split offers several key upgrades over the 4th Gen, focusing on efficiency, advanced technology, and eco-friendliness.

Here’s what’s new with the 5th Gen:

• Next-Gen R-454B Refrigerant: A more environmentally friendly refrigerant with lower global warming potential (GWP), compliant with the latest HVAC regulations.
• Higher Energy Efficiency: Improved SEER2 ratings for greater energy savings and optimized performance.
• Enhanced System Reliability: Upgraded components for better heating and cooling performance.
  

Can I install it myself, or do I need a professional?

The MRCOOL® DIY system is designed for homeowners and doesn’t require HVAC tools. You can install the indoor and outdoor units yourself using the pre-charged Quick Connect® lines. However, a licensed electrician is required for the electrical hookup to ensure safety and code compliance.

Does it work in cold weather?

Yes. MRCOOL® 5th Gen systems feature low-ambient heating and can provide reliable heat even when outdoor temperatures drop to around 5°F.

How do I know what BTU size I need for my rooms?

A general rule of thumb is 20 BTU per square foot of space. Here's a rough guide:

• 6,000 BTU = 100 - 200sq ft
• 9,000 BTU = 150 - 400sq ft
• 12,000 BTU = 351- 550 sq ft
• 18,000 BTU = 501 – 800 sq ft
• 24,000 BTU = 751 – 1,050 sq ft
• 36,000 BTU = 1,001 - 1,550 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

Does it heat as well as cool?
Yes. All 5th Gen models are heat pumps, providing both heating and cooling for year-round comfort.

Is it Wi-Fi compatible?

Yes. The MRCOOL® SmartHVAC app allows smartphone control and works with Amazon Alexa and Google Assistant.

What is the warranty?

The MRCOOL® 5th Generation DIY Mini-Split systems offer the following warranty coverage:

• 7-Year Compressor Replacement Warranty: This warranty ensures that if the compressor fails within the first seven years, MRCOOL® will provide a replacement.
• 5-Year Parts Warranty: This warranty covers all parts of the system for five years from the date of purchase.