MRCOOL® DIY® 4th Gen 27K BTU 3-Zone Ductless Heat Pump Condenser

MODEL: DIY-MULTI3-27HP230C

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:

• MRCOOL® 27K BTU 3-Zone 4th Gen Multi-Zone Condenser (208-230V)

• MRCOOL® Warranty Documents

Specifications

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:

• Compatible MRCOOL® DIY® 4th Gen Multi-Zone Air Handlers

• Pre-Charged Quick Connect® Line Sets (sold separately)
  

Optional Accessories:

• MRCOOL® Wall Mount Brackets or Ground Pads for Condenser

• Line Sets Coupler Kits

• Additional Line Sets

Installation

Installation & Manuals

Product Brochure

Installation Manual

Remote Control Manual 

Warranty Document 

AHRI Certificate 

Energy Certificate