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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only
MrCool 4 Zone 36K BTU (9K+9K+9K+9K) Ductless Heat Pump DIY 4th Gen Air Conditioners MrCool

MRCOOL 4 Zone 36K BTU (9K+9K+9K+9K) 23 SEER2 Ductless Heat Pump DIY 5th Gen

by MRCOOL
$4,671.00 - $4,671.00
$4,671.00
$4,671.00 - $4,671.00
$4,671.00

Many other BTU combinations are available. Contact us at (973) 206-7590 for special requests.

Line sets not included in pricing. Purchase separately below.

🌿 Free shipping on U.S. orders $175+, unless noted above

🌿 Canada, AK & HI: Add'l shipping charges

🌿 Price match guarantee, details here

Energy Rebates & Bulk Pricing Available

SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

Cash Payment Discounts & Financing Options

Get an additional 3% off when you pay by ACH, Money, or Zelle. Select your option at check out.

We accept all major credit cards, crypto and Paypal 0% credit plans. More details here.

Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

Quietly cool or heat four rooms with smart control, energy savings, and an easy install—no HVAC tools or techs needed.

The MRCOOL DIY Multi-Zone 36,000 BTU Mini Split gives you powerful heating and cooling for four separate rooms—no HVAC technician required. With four 9K air handlers (each covering up to 400 sq ft), this system is a go-to solution for bedrooms, home offices, or full apartment coverage.

Get full control via remote, smartphone app, Alexa, or Google Home. Designed for serious comfort and long-term energy savings—without the contractor markup.

Note: Pricing doesn't include the Line Sets. Available to purchase separately. 

Coverage Area

Please refer to this coverage chart to determine the required BTUs for the area you wish to cool or heat.

  • Square Feet: Up to 400 | BTU = 9K
  • Square Feet: Up to 550 | BTU = 12K
  • Square Feet: Up to 800 | BTU = 18K
  • Square Feet: Up to 1050 | BTU = 24K
  • Square Feet: Up to 1550 | BTU = 36K

Note about condenser sizes versus total air handler capacity: The total capacity of the combined air handlers may exceed the capacity of the condenser in certain configurations. While this provides more flexibility in your setup, you will need to either shut off one of your air handlers (zones) or reduce the output of all zones.

Features

  • Easy DIY Installation
  • Simple to Use
  • Multi-room Comfort
  • Energy Efficient DC Inverter
  • 100% Sealed System
  • Gold Fin Condenser
  • Eco Safe R-454B Refrigerant
  • Smartphone App Controls
  • Lifetime Technical Support
  • Follow Me Feature
  • Low Ambient Cooling

What's Included?

  • 1 x MRCOOL 36k DIY 5th Generation 5 Zone Multi-Zone Mini-Split Condenser 230v
  • 4 x MRCOOL 9k DIY 5th Generation Mini-Split Air Handler 230v

Download Resources

Specifications

SKU: DIYM436HPW00C00

SEER2: 23

EER2: 12

HSPF2-4: 9.9

HSPF2-5: 7.5

Tonnage: 3

Cooling Capacity (BTU): 34,000

Heating Capacity (BTU): 36,000

Voltage (V): 208/230

Phase: 1

Cycle: 60

Max Fuse Breaker (A): 35

Min Circuit Ampacity (A): 30.5

Color: White

Zone Capacity: 5

Refrigerant Type: R-454B

Refrigerant Volume (oz): 104.75

Decibel Rating (dBA): 64

Inverter: DC

Line Set Length: 25 ft

Max Line Set Length (ft): 221.4

Liquid Line Size: 1/4

Suction Line Size: (3/8 x4), (1/2 x1)

Compressor Motor Type: Rotary

Auxiliary Heater Included: No

Auxiliary Heater Available: No

Fan Only Option: Yes

Quiet Mode: Yes

Auto Cool: Yes

WiFi Compatibility: Yes

App Compatibility: Yes

Works with iOS: Yes

Works with Android: Yes

UL Listed: Yes

ETL Listed: Yes

Energy Star Certified: Yes

AHRI Certified: Yes

Registered Warranty: Extended Limited Lifetime*

Base Parts Warranty: 5 years

Base Compressor Warranty: 7 years

Has Batteries: Yes

Contains Electronics: Yes

Contains Chemicals: Yes

Contains Aerosol: Yes

Contains Compressed Gas: Yes

Proposition 65 Warning: Yes

Net Depth (in): 16.14

Net Height (in): 31.89

Net Width (in): 37.24

Net Weight (lbs): 169.24

Gross Depth (in): 19.69

Gross Height (in): 34.84

Gross Width (in): 42.91

Gross Weight (lbs): 181.88

Grow Light Central expert advice for indoor growing equipment

Who should use this mini-split system?

  • Homeowners managing climate in four rooms up to 400 sq ft each.
  • DIY installers wanting powerful zoned HVAC without professional labor costs.
  • Growers with four separate zones needing independent climate control for each space.
  • Energy-conscious users seeking high efficiency (23 SEER) in a multi-zone setup.
  • Smart home users integrating HVAC with voice assistants or mobile control.

Best applications

  • Four-zone setups like bedrooms, offices, grow rooms, or living areas.
  • DIY-friendly installs using pre-charged R-454B Quick Connect lines—no vacuuming required.
  • All-season performance offering heating, cooling, and dehumidifying per zone.
  • Smart controls via MRCOOL app, Alexa, Google Home, and individual remotes.
  • Low-maintenance systems with filter alerts, troubleshooting codes, and quiet sleep mode.

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

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