What's in the box
- MRCOOL® 55K DIY® 5th Gen 6-Zone Mini-Split Condenser
- DIYPro™ Communication Cable
- Wireless Remote Control
- Installation Accessories
- MRCOOL® Warranty
MODEL: DIY-MULTI6-55HP230D-O
Whole-Home Climate Control for Up to 2,290 sq. ft. — No HVAC Tech Needed
The MRCOOL® 55K DIY® 5th Generation Multi-Zone Mini-Split Condenser is the ultimate home comfort solution for larger properties or multi-room spaces. This powerful, energy-efficient system can heat and cool up to 6 separate zones covering a combined area of up to 2,290 sq. ft. — all without professional installation.
Featuring a SEER2 rating of 22 and an impressive HSPF2-4 of 10.6, it delivers reliable, eco-friendly performance while lowering utility costs. The patented Quick Connect® pre-charged line sets filled with R-454B refrigerant make installation a simple, clean, and fast DIY project with no need for special tools or refrigerant handling. (Line sets sold separately.)
Connect it to the SmartHVAC® app for complete control via your smartphone or voice commands through Amazon Alexa and Google Assistant. Set schedules, adjust temperatures, monitor energy usage, and customize modes from anywhere.
Backed by a leading warranty, including a Limited Lifetime Compressor Warranty (with registration), the MRCOOL® 55K DIY® system ensures lasting comfort, convenience, and peace of mind for your entire home.
Why You’ll Love It
✅ Heats & Cools Up to 6 Separate Zones — Ideal for large homes or multi-room setups
✅ 100% DIY-Friendly — Quick Connect® pre-charged line sets for tool-free installation
✅ High-Efficiency Performance — SEER2 22 and HSPF2-4 10.6 for outstanding savings
✅ Smart Home Ready — Control via SmartHVAC® app, Alexa, or Google Assistant
✅ Follow Me® Remote — Adjusts temperature to your exact location
✅ Quiet Rotary DC Inverter Compressor — Smooth, energy-efficient operation at just 64 dBA
✅ Eco-Conscious Refrigerant — R-454B for reduced environmental impact
✅ Outstanding Warranty — Limited Lifetime Compressor (with registration), 7-Year Compressor, 5-Year Parts
What You Need for a Complete System
To complete your installation, pair this condenser with:
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MRCOOL® DIY® 5th Gen Multi-Zone Air Handlers (up to 6 total)
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MRCOOL® Quick Connect® Pre-Charged Line Sets (available in various lengths)
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DIYPro™ Communication Cables (25ft included with each air handler)
Optional Accessories:
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MRCOOL® Wall Mount Brackets
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Additional Quick Connect® Line Sets
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Coupler Kits for longer runs
This condenser is compatible only with MRCOOL® DIY® 5th Gen Multi-Zone Air Handlers.
| Attribute | Details |
|---|---|
| BTU Capacity | 47,000 (Cooling) / 55,000 (Heating) |
| Voltage | 208/230V |
| Zones Supported | Up to 6 |
| SEER2 | 22 |
| HSPF2-4 / HSPF2-5 | 10.6 / 8.5 |
| Refrigerant Type | R-454B |
| Line Set Compatibility | MRCOOL® Quick Connect® |
| Max Line Set Length (ft) | 221.4 |
| Liquid Line Size | 1/4″ |
| Suction Line Size | (3/8″ x4) (1/2″ x2) |
| Sound Rating (dBA) | 64 |
| 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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