MRCOOL DIY Ductless Mini Split Air Conditioner - 5th Gen system showing both the indoor and outdoor units with connection pipes and accessories.

MRCOOL DIY 9K BTU 1 Zone Ductless Mini Split Air Conditioner - 5th Gen

Q: What is an AC with heat pump and why is it ideal for grow setups?

An AC with a heat pump provides both cooling and heating, allowing growers to maintain a stable environment year-round. It’s especially useful for handling seasonal shifts without switching equipment, ensuring consistent growth conditions from veg to bloom.

Q: How do I size an AC with heat pump for my grow room?

You’ll need to factor in grow room size (cubic feet), lighting wattage, equipment heat output, and insulation. A rough rule is 3,500–5,000 BTUs per 1000W of lighting, but high-performance grows may require more. Proper sizing avoids overcooling or inefficiency.

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Heat and cool rooms up to 400 sq ft with smart control, R-454B efficiency, and no HVAC pro needed for install.

Enhance your home’s heating and cooling efficiency with the MRCOOL DIY 5th Gen ENERGY STAR 9,000 BTU Single Zone Mini-Split System. Engineered for true DIY installation, this ductless heat pump mini-split is perfect for rooms up to 400 sq. ft.. With R-454B refrigerant, ENERGY STAR certification, and smart home integration, this system provides powerful, energy-efficient performance year-round without needing professional installation.

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

DIY Installation: Specifically designed for amateur installation. No special tools or training are required.
Smartphone App Control: Control via Apple or Android devices, using an internet connection.
Quick Connect: Patented lines for simple installation without specialized tools.
DIYPro Armored Cable: Includes future-proof cable, eliminating the need for electrical conduit.
Louver Position Memory: Air handler's horizontal louver resets to the same position after powering on.
Gold Fin Condenser: Corrosion-resistant condenser, ideal for coastal environments.
Digital Assistant Ready: Fully supports Google Assistant and Amazon Alexa out of the box.
Follow Me Function: Remote control tracks air temperature around you for optimal comfort.
Auto Restart: The system restarts automatically after a power outage.

What's Included?

MRCOOL DIY 5th Gen E Star 9K BTU Single Zone Mini Split Complete System
25ft. Line Set 115V

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Specifications

Mini-Split Condenser (Outdoor Unit)

Model: DIY-09-HP-C-115D25-O

Tonnage: 0.75 Ton

Cooling Capacity (BTU): 9,000

Heating Capacity (BTU): 10,000

SEER2: 23.6

EER2: 14

HSPF2-4: 11.5

Voltage (V): 115

Phase / Cycle: 1 / 60

Max Fuse Breaker (A): 20

Min Circuit Ampacity (A): 18

Refrigerant Type: R-454B

Decibel Rating (dBA): 54

Max Line Set Length (ft): 82

Line Sizes: 1/4" Liquid, 3/8" Suction

Inverter: DC Rotary Compressor

WiFi/App Compatibility: Yes (iOS/Android)

Certifications: Energy Star, AHRI, UL, ETL

Warranty: 5-Year Parts / 7-Year Compressor / Extended Lifetime (registered)

Mini-Split Air Handler (Indoor Unit)

Model: DIY-09-HP-WMAH-115D25-O

Tonnage: 0.75 Ton

Voltage (V): 115

Max Coverage Area: 400 sq. ft.

Decibel Rating (Low/High dBA): 18–43

Number of Speeds: 5

Oscillation: Yes

Filter Type: Reusable

Mount Type: Wall

WiFi/App Compatibility: Yes (iOS/Android + Remote)

Certifications: Energy Star, AHRI, UL, ETL

Warranty: 5-Year Parts / 7-Year Compressor / Extended Lifetime (registered)

Grow Light Central expert advice for indoor growing equipment

Who should use this mini-split?

Home growers needing precise temp control without pro install
Indoor cultivators managing climate in sealed or tented grow spaces
Homeowners upgrading a room, studio, or office up to 400 sq ft
DIY-friendly setups where hiring HVAC isn’t practical or affordable
Smart home users who want remote access and voice command control

Best applications

Grow rooms and tents needing stable temps with no ducting required
Efficient climate control using R-454B refrigerant and ENERGY STAR tech
Tool-free installs with Quick Connect lines and armored power cable
App and voice integration with Alexa, Google Assistant, and mobile control
Auto-restart and louver memory to maintain settings after power cuts

Why Shop with Grow Light Central?

“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.

FAQs

What is an AC with heat pump and why is it ideal for grow setups?

An AC with a heat pump provides both cooling and heating, allowing growers to maintain a stable environment year-round. It’s especially useful for handling seasonal shifts without switching equipment, ensuring consistent growth conditions from veg to bloom.

How do I size an AC with heat pump for my grow room?

You’ll need to factor in grow room size (cubic feet), lighting wattage, equipment heat output, and insulation. A rough rule is 3,500–5,000 BTUs per 1000W of lighting, but high-performance grows may require more. Proper sizing avoids overcooling or inefficiency.

Replacement Screens for Bubble Magic Pollen Tumblers (All Sizes)

Satisfied customer

Fast shipping and good customer service!

HLG 350

So far just starting a run, but all is well. I’m playing with the light height and intensity as the run progresses. Easy setup no issues a solid light. I’ve owned dozens of grow lights over decades of growing HGL 350 appears to be on par with the others I’ve owned and still do.

Cheap and dangerous

Dulytek presses are outright dangerous, missing crucial pieces can lead to serious injury. I had missing washers on top of cage springs that launched the nuts and clips like bullets.

Ac infinity 3x3 tent kit.

Very happy with the product. Would definitely recommend over the cheap tents you get what you pay for. Just set it up and about to start germinating my seeds.