What's in the box
- MRCOOL® 36K DIY® 5th Gen 5-Zone Mini-Split Condenser
- DIYPro™ Communication Cable
- Wireless Remote Control
- Installation Accessories
- MRCOOL® Warranty
MODEL: DIY-MULTI5-36HP230D-O
DIY Multi-Zone Climate Control for Larger Homes (Up to 5 Rooms / 1,500–1,800 sq. ft.)
Bring total climate control to your home with the MRCOOL® 36K DIY® 5th Generation Multi-Zone Mini-Split Condenser — the ultimate DIY heating and cooling solution for multiple spaces. Capable of powering up to 5 air handlers with a combined coverage of up to 1,800 sq. ft., this 3-ton condenser delivers outstanding efficiency and whisper-quiet operation.
With a SEER2 rating of 21.5 and HSPF2-4 of 9, it keeps your energy bills in check while providing year-round comfort. Thanks to MRCOOL®'s exclusive Quick Connect® pre-charged line sets with eco-friendly R-454B refrigerant, installation is fast, clean, and entirely DIY — no professional tools or vacuuming required. Line sets are sold separately.
Take full control of your home environment with the SmartHVAC® app, Amazon Alexa, and Google Assistant integration. Easily adjust temperatures, set schedules, and monitor energy use — all from your phone or voice command.
Protected by an industry-leading Limited Lifetime Compressor Replacement Warranty (with registration), this 5-zone condenser is built for long-lasting reliability and total home customization.
Why You’ll Love It
✅ Supports Up to 5 Zones — Heats and cools up to five rooms for tailored comfort.
✅ Hassle-Free DIY Installation — Uses MRCOOL® Quick Connect® pre-charged line sets for mess-free, tool-free setup.
✅ Energy Efficient Performance — SEER2 21.5 and HSPF2-4 9 for lower energy costs.
✅ Smart-Home Ready — WiFi enabled for SmartHVAC® app, Alexa, and Google Assistant control.
✅ Follow Me® Feature — Keeps your comfort consistent wherever you move.
✅ Ultra-Quiet Operation — DC inverter rotary compressor keeps sound levels low.
✅ Eco-Friendly R-454B Refrigerant — Safer, efficient, and future-ready.
✅ Lifetime Compressor Warranty — Limited Lifetime Compressor (registered), 7-Year Compressor, 5-Year Parts.
What You Need for a Complete System
To operate at full capacity, pair this condenser with:
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MRCOOL® DIY® 5th Gen Multi-Zone Air Handlers (up to 5 total)
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MRCOOL® Quick Connect® Pre-Charged Line Sets (available in multiple lengths — sold separately)
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DIYPro™ Communication Cables (25ft included with each air handler)
Optional Accessories:
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MRCOOL® Wall Mount Bracket
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Additional Quick Connect® Line Sets
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Coupler Kits for extended runs
This condenser is compatible only with MRCOOL® DIY® 5th Generation Multi-Zone Air Handlers.
| Attribute | Details |
|---|---|
| BTU Capacity | 36,000 BTU |
| Voltage | 208/230V |
| Zones Supported | Up to 5 |
| SEER2 | 21.5 |
| HSPF2-4 / HSPF2-5 | 9 / 7 |
| Refrigerant Type | R-454B |
| Line Set Compatibility | MRCOOL® Quick Connect® |
| Max Line Set Length (ft) | 246.1 |
| Liquid Line Size | 1/4″ |
| Suction Line Size | 3/8″ |
| Sound Rating (dBA) | 62 |
| Wi-Fi Compatibility | Yes (SmartHVAC App, Alexa, Google Assistant) |
| Warranty | Limited Lifetime Compressor (registered), 7-Year Compressor, 5-Year Parts |
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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