What's in the box
- MRCOOL® 27K DIY® 5th Gen 4-Zone Mini-Split Condenser
- DIYPro™ Communication Cable
- Wireless Remote Control
- Installation Accessories
- MRCOOL® Warranty
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-MULTI4-27HP230D-O
DIY Multi-Zone Heating & Cooling for Up to 4 Rooms (1,000–1,200 sq. ft.)
Take charge of your home’s comfort with the MRCOOL® 27K DIY® 5th Generation Multi-Zone Mini-Split Condenser — a powerful, energy-saving solution designed to deliver efficient heating and cooling to four separate rooms. Perfect for larger homes, basements, home offices, or converted garages totaling up to 1,200 sq. ft.
Achieving a SEER2 rating of 23 and HSPF2-4 of 9.5, this 2.25-ton condenser balances premium performance with serious energy savings. It’s fully DIY-installation-ready thanks to MRCOOL®’s Quick Connect® pre-charged line sets, now filled with eco-friendly R-454B refrigerant for enhanced efficiency and sustainability.
Connect this condenser to up to 4 MRCOOL® 5th Gen DIY® Air Handlers for fully customizable, room-by-room climate control. Integrated Wi-Fi capability with the SmartHVAC® app, Amazon Alexa, and Google Assistant ensures you’re always in control, whether at home or away.
Built for durability with weather-resistant components and a reliable rotary inverter compressor, it operates quietly at 61 dBA. Backed by an impressive Limited Lifetime Compressor Replacement Warranty (with registration), you can rest easy knowing your comfort investment is protected.
Why You’ll Love It
✅ Connects Up to 4 Zones — Heats and cools four separate rooms for personalized comfort.
✅ Seamless DIY Installation — MRCOOL® Quick Connect® pre-charged line sets for easy, no-vacuum setup.
✅ High Energy Efficiency — SEER2 23 and HSPF2-4 9.5 for year-round cost savings.
✅ Smart-Home Control — Manage via SmartHVAC® app, Alexa, or Google Assistant.
✅ Follow Me® Technology — Keeps the temperature comfortable wherever you are.
✅ Ultra-Quiet Performance — Quiet rotary inverter operation at just 61 dBA.
✅ Eco-Friendly Refrigerant — Uses sustainable R-454B for reduced environmental impact.
✅ Industry-Leading Warranty — Limited Lifetime Compressor (registered), 7-Year Compressor, 5-Year Parts.
What’s Included:
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MRCOOL® 27K DIY® 5th Gen 4-Zone Mini-Split Condenser
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DIYPro™ Communication Cable
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Wireless Remote Control
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Installation Accessories
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MRCOOL® Warranty
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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