The MRCOOL® DIY® 5th Gen E Star 18,000 BTU Single Zone Mini Split Complete System with 25 ft. QuickConnect® Line Set is designed to deliver year-round heating and cooling for spaces approximately 500 to 750 sq. ft. This ductless mini split system includes an 18K BTU condenser, indoor air handler, pre-charged line set, communication wire, remote control, and wall sleeve.
Built with environmentally friendly R-454B refrigerant, advanced DC inverter technology, and smart home compatibility, the DIY-18-HP-WM-230D25-O provides an efficient and reliable comfort solution for bedrooms, living rooms, garages, offices, and home additions. The patented QuickConnect® technology allows for true DIY installation without requiring specialized HVAC tools or refrigerant handling.
Key Features & Benefits
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True DIY Installation: Includes a pre-charged 25 ft. QuickConnect® line set for easy installation without vacuum pumps or special tools.
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18,000 BTU Heating & Cooling: Ideal for spaces approximately 500 to 750 sq. ft.
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Energy Star® Certified: Helps reduce energy consumption and lower utility costs.
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Eco-Friendly R-454B Refrigerant: Lower Global Warming Potential (GWP) than previous refrigerants.
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DIYPRO® Cable: Eliminates the need for electrical conduit while providing additional protection from outdoor elements and wildlife.
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SmartHVAC® App Compatible: Control your system remotely from virtually anywhere.
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Voice Control: Compatible with Amazon Alexa and Google Assistant.
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Follow Me® Function: Adjusts temperature based on the location of the remote control.
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Dry Mode: Helps reduce indoor humidity for improved comfort.
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Gold Fin® Condenser: Corrosion-resistant coating designed for long-lasting durability.
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Ultra-Quiet Operation: Ideal for bedrooms, offices, and living spaces.
Perfect For
- Bedrooms and master suites
- Home offices and studies
- Living rooms and family rooms
- Garages and workshops
- Bonus rooms and finished basements
- Apartments and condominiums
- Sunrooms and enclosed patios
- Areas without existing ductwork
What's Included
- 18K BTU Condenser – DIY-18-HP-C-230D25-O
- 18K BTU Air Handler – DIY-18-HP-WMAH-230D25-O
- 25 ft. Pre-Charged Line Set – DIY25-1438-O
- 25 ft. Communication Wire
- Remote Control
- Wall Sleeve
Specifications & Dimensions
Dimensions & Weight
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Condenser Dimensions: 35.04" W x 13.46" D x 26.50" H
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Condenser Weight: 93.48 lbs / 42.4 kg
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Air Handler Dimensions: 42.52" W x 8.90" D x 13.19" H
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Air Handler Weight: 35.49 lbs / 16.1 kg
Capacity & Performance
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Zone Capacity: 1
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Cooling Capacity: 18,000 BTU
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Heating Capacity: 18,000 BTU
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Coverage Area: 500 to 750 sq. ft.
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EER2: 13.7
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SEER2: 22.5
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HSPF2-4: 11.5
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HSPF2-5: 8.5
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Outdoor Operating Temperature - Cooling: -13°F to 122°F
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Outdoor Operating Temperature - Heating: -13°F to 75°F
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Outdoor Noise Level: 58.5 dB(A)
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Indoor Noise Level: 54.5 / 44.5 / 40.5 / 30.5 / 19.0 dB(A)
Electrical Requirements
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Voltage: 208-230V
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Phase: 1
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Cycle: 60 Hz
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Maximum Fuse Breaker: 20A
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Minimum Circuit Ampacity: 18A
Refrigerant & Piping
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Refrigerant Type: R-454B
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Refrigerant Volume: 44.80 oz
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Liquid Line Size: 1/4"
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Suction Line Size: 1/2"
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Maximum Line Set Length: 98.4 ft.
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Included Line Set: 25 ft. Pre-Charged QuickConnect® Line Set
Features
- DC Inverter
- Rotary Compressor
- Fan Only Option
- Quiet Mode
- Auto Cool
- WiFi Compatibility
- App Compatibility
- Works with iOS
- Works with Android
- Remote Control Included
Certifications & Warranty
- UL Listed
- ETL Listed
- Energy Star® Certified
- AHRI Certified
- 7-Year Compressor Warranty
- 5-Year Parts Warranty
Why Buy from CulinaryProfis?
CulinaryProfis is an authorized online dealer offering secure checkout, expert customer support, and nationwide shipping throughout the contiguous United States. If you need help choosing the right MRCOOL system for your application, our team is here to assist you before and after your purchase.
Frequently Asked Questions
What size room can this 18K MRCOOL system heat and cool?
This model is designed for spaces approximately 500 to 750 sq. ft. Actual performance may vary depending on insulation, ceiling height, climate, sun exposure, and room layout.
Does this system require ductwork?
No. This is a ductless mini split system.
Can I install this system myself?
Yes. The MRCOOL DIY system is designed for homeowner installation. However, electrical connections should be completed by a licensed electrician in accordance with local building codes.
Does this system provide both heating and cooling?
Yes. This model is a heat pump system that provides year-round comfort.
Is this system WiFi compatible?
Yes. It works with the MRCOOL SmartHVAC® app and supports Amazon Alexa and Google Assistant.
Does this purchase include the line set?
Yes. This model includes a 25 ft. pre-charged QuickConnect® line set.
Shipping Information
Free shipping is available on qualifying MRCOOL orders over $1,000 within the 48 contiguous United States. Orders ship via UPS, FedEx, freight carrier, or the most economical available provider.
Large HVAC systems are delivered by curbside service only. Carriers do not provide inside delivery, garage delivery, installation, or white glove service unless specifically stated otherwise.
Tracking information is typically provided within 2-4 business days after your order is placed. Delivery times may vary depending on inventory availability, carrier conditions, and destination.
Adult Signature Required: A person 18 years of age or older must be present to accept and sign for delivery.
Freight & Delivery Policy
Please inspect your shipment immediately upon delivery.
- If the packaging is visibly damaged, take photographs and note the damage on the delivery receipt before signing.
- If concealed damage is discovered, contact CulinaryProfis within 24 hours and provide photographs of the damage.
- Please retain all original packaging materials until the shipment has been fully inspected and accepted.
- Orders canceled after shipment may be subject to a restocking fee and return freight charges.
