MRCOOL® DIY® 4th Gen 27K BTU 3-Zone Ductless Heat Pump Condenser
MODEL: DIY-MULTI3-18HP230C
Product Description
Flexible, Efficient Climate Control for 3 Separate Spaces
The MRCOOL® DIY® 4th Generation 27K BTU Multi-Zone Condenser delivers efficient, reliable heating and cooling for up to three independent zones. With an impressive up to 22 SEER rating, this system ensures significant energy savings while maintaining year-round comfort—even when outside temperatures dip to -13°F.
Built for the modern DIY homeowner, this unit connects easily to MRCOOL® Pre-Charged Quick Connect® Line Sets that come pre-filled with R-410A refrigerant. No vacuum pumps, no certified HVAC techs, no complications—just straightforward installation with basic hand tools.
Equipped with a Gold Fin® condenser coating, it resists corrosion and is perfect for coastal or high-humidity areas. The advanced DC inverter compressor delivers quiet, energy-efficient operation and smooth, steady temperature control across multiple rooms.
Backed by an outstanding limited lifetime compressor warranty (with registration), plus 7-year compressor and 5-year parts coverage, the MRCOOL® 27K 3-Zone DIY Condenser makes professional-grade climate control accessible for homeowners looking for flexibility, dependability, and convenience.
Why You’ll Love It
✅ Multi-Zone Flexibility — Comfort control for three separate rooms or zones with one outdoor condenser
✅ True DIY Installation — Pairs with Pre-Charged Quick Connect® Line Sets; no vacuuming, no special tools, no pro needed
✅ High-Efficiency SEER 22 Performance — Saves energy while maintaining year-round comfort
✅ Reliable Heating in Extreme Cold — Operates efficiently down to -13°F
✅ Gold Fin® Condenser Protection — Corrosion-resistant for long-lasting durability in humid or coastal climates
✅ Quiet Twin Rotary DC Inverter Compressor — Smooth, energy-efficient, and whisper-quiet operation
✅ Industry-Leading Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor, 5-Year Parts Warranty
What’s Included:
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MRCOOL® 27K BTU 3-Zone 4th Gen Multi-Zone Condenser (208-230V)
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MRCOOL® Warranty Documents
Specifications at a Glance
| Attribute | Details |
|---|---|
| Cooling Capacity (BTU) | 27,000 |
| Heating Capacity (BTU) | 29,000 |
| Voltage | 208-230V |
| Phase | 1 |
| Cycle | 60 Hz |
| Zone Capacity | 3 |
| Refrigerant Type | R-410A |
| Refrigerant Volume (oz) | ~98 |
| SEER / SEER2 | 22 / 22.1 |
| HSPF (4/5) | 10.8 / 8.8 |
| EER / EER2 | 12.7 / 12.7 |
| Max Fuse Breaker (A) | 30 |
| Min Circuit Ampacity (A) | 22 |
| Min Ambient Cooling (°F) | 5 |
| Min Ambient Heating (°F) | -13 |
| Max Total Line Set Length (ft) | 164 |
| Liquid Line Size | 1/4” |
| Suction Line Size | 1/2” |
| Condenser Motor Type | Twin Rotary DC Inverter |
| Noise Level (dBA) | 59 |
| Wi-Fi Enabled | Yes |
| App Compatibility | iOS & Android |
| Remote Control Included | No (via paired air handlers) |
| Warranty | Lifetime Compressor (registration required), 7-Year Compressor, 5-Year Parts |
| Net Dimensions (WxHxD) | 40.94” x 29.33” x 17.64” |
| Gross Dimensions (WxHxD) | 44.09” x 31.50” x 19.50” |
| Net Weight | 110 lbs |
| Gross Weight | 121 lbs |
Room Size & BTU Coverage Guide
Choosing the right BTU (British Thermal Unit) output ensures your space stays consistently comfortable all year round.
| BTU Rating | Ideal Combined Room Size |
|---|---|
| 18,000 | 600–800 sq. ft. |
| 27,000 | 900–1,200 sq. ft. |
| 36,000 | 1,200–1,500 sq. ft. |
| 48,000 | 1,500–2,000 sq. ft. |
Important:
Always consider additional factors such as ceiling height, insulation quality, sun exposure, number of windows, climate, and the number of heat-producing appliances in your space when choosing the right system.
What You Need for a Complete System
This condenser requires pairing with:
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Compatible MRCOOL® DIY® 4th Gen Multi-Zone Air Handlers
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Pre-Charged Quick Connect® Line Sets (sold separately)
Optional Accessories:
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MRCOOL® Wall Mount Brackets or Ground Pads for Condenser
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Line Sets Coupler Kits
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Additional Line Sets
Installation & Manuals
Shipping Policy
At Cool Heat Direct, we offer free curbside delivery on all MRCOOL product orders via FedEx Ground, FedEx Freight, or trusted carriers depending on order size.
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Deliveries are made to the curbside — please arrange assistance for heavy or large items, as drivers do not carry items indoors or upstairs.
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Tracking details will be sent within 3–5 business days after placing your order.
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Freight shipments are scheduled directly by the carrier using the contact information you provide at checkout.
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Please inspect your shipment upon delivery and report any visible damage on the delivery receipt.
👉 Click here for our full Shipping Policy
Return Policy
We want you to love your purchase from Cool Heat Direct. If you need to return an item:
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Contact us within 30 days of delivery.
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Items must be unused, uninstalled, and in their original packaging.
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A 35% restocking fee applies to all approved returns.
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Accessories such as line sets, wall mounts, and couplers are non-returnable.
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Return shipping is the customer’s responsibility unless the item is damaged or defective on arrival.
To start a return, please email us at support@coolheatdirect.com with your order number and reason for return.
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