What's in the box
- MRCOOL® 36K DIY® 5th Gen Mini-Split Condenser
- 25ft DIYPro™ Communication Cable
- Installation Accessories
- MRCOOL® Warranty Documents
Free curbside shipping on eligible MRCOOL® systems across the continental U.S. Most products ship in 3–5 business days and arrive in 4–10 days, depending on your location. Freight carriers will call to schedule delivery.
Returns accepted within 30 days on new, unopened items in original packaging. A restocking fee of up to 35% may apply for HVAC equipment — we’ll always confirm before issuing a return authorization.
Each MRCOOL® system is backed by manufacturer warranty coverage as defined by product and model — typically 5–10 years on major components. Register your system after installation to activate full coverage.
Need help with sizing, voltage or compatibility? Email support@coolheatdirect.com — our U.S. team replies within one business day.
MODEL: DIY-36-HP-C-230D25-O
High-Powered, DIY-Friendly Comfort for Large Spaces up to 1,500 sq. ft.
The MRCOOL® 36K BTU DIY® 5th Generation Mini-Split Condenser is built to deliver powerful, energy-efficient heating and cooling for expansive rooms and open spaces—without professional installation. Ideal for basements, large living rooms, home gyms, workshops, and retail areas up to 1,500 sq. ft.
With a pre-charged 25-foot Quick Connect® line set filled with eco-friendly R-454B refrigerant, this system eliminates the need for vacuuming and HVAC contractors. The included DIYPro™ cable offers enhanced durability, replacing traditional electrical conduit to resist damage from weather, animals, and yardwork hazards.
Enjoy full climate control via the SmartHVAC® app, Amazon Alexa, Google Assistant, or the included wireless remote. The Gold Fin® condenser coating adds an extra layer of corrosion resistance, making it an ideal choice for coastal, humid, or high-moisture environments.
Equipped with smart features like Auto Mode, Energy-Saving Timer, Auto Restart, and Anti-Mildew Protection, this system ensures optimal comfort, efficiency, and air quality. Backed by an industry-best Limited Lifetime Compressor Warranty, plus 7-year compressor and 5-year parts coverage, it’s a reliable investment in lasting home comfort.
Why You’ll Love It
✅ Perfect for Large Spaces — Comfortably heats and cools up to 1,500 sq. ft.
✅ DIY Installation Made Simple — Pre-charged Quick Connect® line set and DIYPro™ cable mean no specialty tools or pro installers needed
✅ Smart-Home Compatible — Control with SmartHVAC® app, Alexa, and Google Assistant
✅ Coastal-Ready Protection — Gold Fin® condenser coating ensures long-lasting performance in tough environments
✅ Low-Noise Operation — Quiet, efficient performance with a decibel rating of just 60.5 dBA
✅ Eco-Friendly Refrigerant — Pre-charged with high-efficiency R-454B refrigerant
✅ Best-in-Class Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor Warranty, 5-Year Parts Warranty
What’s Included:
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MRCOOL® 36K DIY® 5th Gen Mini-Split Condenser
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25ft DIYPro™ Communication Cable
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Installation Accessories
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MRCOOL® Warranty Documents
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.
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