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MRCOOL  |  SKU: DIYM355HPW09D37
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MRCOOL DIY 5th Gen Multi‑Zone 6‑Zone 55,000 BTU 22 SEER2 (9K + 9K + 36K) Ductless Mini‑Split Air Conditioner & Heat Pump – DIYM355HPW09D37

$7,139.00 USD $7,639.00

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Description

MRCOOL DIY 5th Gen Multi‑Zone 6‑Zone 55,000 BTU 22 SEER2 (9K + 9K + 36K) Ductless Mini‑Split Air Conditioner & Heat Pump – DIYM355HPW09D37

The MRCOOL DIY 5th Gen Multi‑Zone 6‑Zone 55,000 BTU Mini‑Split System is a high‑performance heating and cooling solution designed for homeowners seeking whole‑home comfort without professional installation costs. Built around a powerful 55,000 BTU outdoor condenser, this multi‑zone system delivers efficient, whisper‑quiet climate control across up to six indoor zones, making it perfect for large homes, open‑concept living spaces, workshops, and offices. With two 9,000 BTU indoor units for smaller rooms and a 36,000 BTU unit for larger areas, you get balanced, customizable comfort tailored to each space’s needs.

Installation is simplified with MRCOOL’s DIY® QuickConnect® pre‑charged line sets and the included DIYPRO® communication cable—no vacuum pump, gauges, or HVAC license required. The system features R‑454B refrigerant, DC inverter technology, and smart connectivity, so you enjoy energy‑efficient performance, year‑round reliability, and easy temperature control right from your smartphone or voice assistant.

Features

  • 55,000 BTU total system capacity
  • Supports up to 6 indoor zones
  • 22 SEER2 efficiency / 10.6 HSPF2-4
  • DC inverter compressor for precise load control
  • DIY® QuickConnect® pre-charged line sets
  • Extended-reach 25-ft line sets included
  • DIYPRO® cable — no conduit required
  • Gold Fin® corrosion-resistant coating
  • Follow Me® temperature sensing
  • MRCOOL® Smart HVAC Controller® App
  • Amazon Alexa® & Google Home® compatible
  • Ultra-quiet indoor operation
  • Independent temperature control by zone

Specifications

Specification Details
Model DIYM355HPW09D37
System Capacity 55,000 BTU
SEER2 Rating 22
HSPF2‑4 10.6
Zones Up to 6
Indoor Units (2) 9K BTU, (1) 36K BTU
Line Sets (2) 25 ft (1/4 × 3/8), (1) 25 ft (3/8 × 5/8)
Voltage 208/230 V
Phase Single‑phase
Frequency 60 Hz
MCA 43 amps
Maximum Breaker Size 45 amps
Refrigerant R‑454B
Outdoor Dimensions 37.48″ W × 16.34″ D × 52.48″ H
Outdoor Weight 245.8 lbs
9K Indoor Dimension 31.57″ W × 7.44″ D × 11.69″ H
9K Indoor Weight ~25 lbs
36K Indoor Dimension 49.57″ W × 11.10″ D × 14.25″ H
36K Indoor Weight ~49 lbs
Warranty 5‑Year Parts, 7‑Year Compressor, Limited Lifetime Replacement*

What’s Included 

  • ✔ MRCOOL® DIY® 55K BTU 6-Zone Outdoor Condenser
  • ✔ (2) 9K BTU Wall-Mounted Indoor Air Handlers
  • ✔ (1) 36K BTU Wall-Mounted Indoor Air Handler
  • ✔ (2) 25-ft DIY® QuickConnect® Line Sets (1/4 × 3/8)
  • ✔ (1) 25-ft DIY® QuickConnect® Line Set (3/8 × 5/8)
  • ✔ DIYPRO® communication cable
  • ✔ Wireless remotes for each indoor unit
  • ✔ Installation manuals & mounting hardware

Frequently Asked Questions (FAQ's)

Is this system truly DIY?

Yes. No vacuum pump, gauges, or refrigerant handling is required.

Can I add more zones later?

Yes. This condenser supports up to six indoor units total.

Will it heat efficiently in winter?

Yes. The inverter heat pump delivers strong low-temperature heating performance.

Is this system certified?

Yes. ENERGY STAR® and AHRI certified.

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