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
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-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’s Included:
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MRCOOL® 36K DIY® 5th Gen 5-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
Specifications at a Glance
| 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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