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MRCOOL 18,000 BTU DIY Mini Split Heat Pump 5th Gen E Star 25ft Line Set

MRCOOL 18,000 BTU DIY Mini Split Heat Pump 5th Gen E Star 25ft Line Set

By MRCOOL | Model: DIY-18-HP-WM-230D25-O | ID: 040007
✓ No Sales Tax - in most states excluding California
✓ Manufacturer Warranty Included
✓ Satisfaction Guarantee - or return within 30 Days
✓ Most Products In Stock - Call or Text (833) 658-3387 for availability
$2,909.00 + FREE SHIPPING

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Product Details

MRCOOL DIY 5th Generation 18,000 BTU Mini Split System DIY-18-HP-WM-230D25-O

Upgrade your home's comfort and efficiency with the MRCOOL® DIY® 5th Generation 18,000 BTU Mini Split System – a powerful, ENERGY STAR® certified solution designed for true do-it-yourself installation. Ideal for larger areas between 500 and 750 square feet, this single-zone ductless system delivers efficient, whisper-quiet heating and cooling without requiring professional tools or HVAC licensing.

Equipped with a 25-foot pre-charged Quick Connect® line set, the system uses R-454B refrigerant, which offers a reduced global warming potential (GWP) compared to older refrigerants. Its advanced inverter technology ensures precise temperature control, lower energy consumption, and extended component life by adjusting performance in real-time based on your environment.

Stay connected and in control with integrated Wi-Fi capabilities, allowing full system management from your smartphone using the MRCOOL SmartHVAC app, or through hands-free control with Amazon Alexa or Google Assistant. Whether you're upgrading a living room, open-concept space, or workshop, this system is built to deliver maximum comfort with minimal installation effort.

Key Features:

  • 18,000 BTU Capacity: Perfect for spaces between 500–750 sq. ft., ensuring effective heating and cooling for medium-sized rooms or individual zones.
  • ENERGY STAR® Certified: Optimized for energy savings and reduced utility costs while maintaining high performance throughout the year.
  • Easy DIY Installation: Designed for homeowners who want to install the system themselves with no HVAC tools or professional technician assistance.
  • 25ft Pre-Charged Line Set: Comes with Quick Connect® fittings and environmentally friendly R-454B refrigerant, simplifying setup and minimizing environmental impact.
  • Inverter Technology: Provides precise, energy-efficient climate control by dynamically adjusting performance based on environmental conditions.
  • Smart Home Integration: Fully compatible with Amazon Alexa, Google Assistant, and the MRCOOL SmartHVAC app for easy remote control and voice activation.
  • Heating & Cooling in One Unit: Offers reliable performance in both heating and cooling modes, making it suitable for year-round comfort.
  • Quiet Operation: Operates with minimal noise, ensuring a peaceful and comfortable environment.
  • 5-Year Compressor & 1-Year Parts Warranty: Enjoy long-term peace of mind with dependable support and protection from a trusted brand.

The MRCOOL DIY® 18K BTU Mini Split System is the perfect combination of performance, efficiency, and convenience—ideal for homeowners, renovators, and DIYers who want professional-grade results without the need for professional installation.

View More DIY Mini Split Systems

Specifications

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Brand MRCOOL SKU DIY-18-HP-C-230D25-O
Weight 93 Manufacturer MRCOOL
HSPF2 11.5 Cooling BTU 18000 BTU
Heating BTU 18000 BTU Refrigerant R454B
SEER2 22 Compressor Type Rotary
Liquid Line 1/4" Suction Line 1/2"
Max Breaker Size 20A BTU/Tonnage 18,000 BTU/1.5 Ton
Zone Compatibility Single Zone Height 26.5"
Width 35.04" Depth 13.46"

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Brand MRCOOL SKU DIY-18-HP-WMAH-230D25-O
Weight 35 Manufacturer MRCOOL
Refrigerant R454B Liquid Line 1/4"
Suction Line 1/2" Max Breaker Size 15A
BTU/Tonnage 18,000 BTU/1.5 Ton Height 13.19"
Width 42.52" Depth 8.9"
Warranty

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Warranty Coverage
Parts 1 Year
Compressor 5 Year

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Warranty Coverage
Parts 1 Year
Compressor 5 Year
Documents

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Submittal
Service Manual (English)
Installation Manual
Warranty
Owner's Manual

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Submittal
Service Manual (English)
Installation Manual
Warranty
Owner's Manual

Shipping

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Reviews

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Customers rate us 5.0/5 based on 8 reviews.
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B
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B.H.
Impressed by the quality

I’ve installed Goodman heat pumps before at a similar price point. This was better quality, and a great deal from the HVAC store. I’m always a little nervous about picking the lowest cost provider but the came through quick and no damage.

I’m in the middle of install so if you don’t see an update, things went well. As I said, first impressions as I opened it up to adjust airflow direction was very impressed!

B
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Bobby Jackson
A good store to shop for HVAC supply

The store did some things I didn't believe the manager was very helpful in fixing my problem

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Perfect

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very reliable company and great prices

Bought a few units from this company and they were very friendly and easy to work with. Either matched prices or beat the price and had fast shipping also.

P
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Paul R
Excellent company to purchase from

I wasn’t to sure about if this company could deliver it quickly but it arrived within a week. No issues. I needed this one for parts as my first one that I installed a year ago had the ecm go out on the blower fan. Parts are hard to come by for this Chinese brand. I think the ecm went out due to condensation in the main supply plenum dripping onto fan motor. I do like this ac unit but hope the fan lasts longer than a year. I covered the fan ecm with flex seal tape.

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Phillip Davis

Sale representative Lopez was very experienced and professional. I would recommend this company to any one and I am looking forward to work with Lopez again.

Product Details

MRCOOL DIY 5th Generation 18,000 BTU Mini Split System DIY-18-HP-WM-230D25-O

Upgrade your home's comfort and efficiency with the MRCOOL® DIY® 5th Generation 18,000 BTU Mini Split System – a powerful, ENERGY STAR® certified solution designed for true do-it-yourself installation. Ideal for larger areas between 500 and 750 square feet, this single-zone ductless system delivers efficient, whisper-quiet heating and cooling without requiring professional tools or HVAC licensing.

Equipped with a 25-foot pre-charged Quick Connect® line set, the system uses R-454B refrigerant, which offers a reduced global warming potential (GWP) compared to older refrigerants. Its advanced inverter technology ensures precise temperature control, lower energy consumption, and extended component life by adjusting performance in real-time based on your environment.

Stay connected and in control with integrated Wi-Fi capabilities, allowing full system management from your smartphone using the MRCOOL SmartHVAC app, or through hands-free control with Amazon Alexa or Google Assistant. Whether you're upgrading a living room, open-concept space, or workshop, this system is built to deliver maximum comfort with minimal installation effort.

Key Features:

  • 18,000 BTU Capacity: Perfect for spaces between 500–750 sq. ft., ensuring effective heating and cooling for medium-sized rooms or individual zones.
  • ENERGY STAR® Certified: Optimized for energy savings and reduced utility costs while maintaining high performance throughout the year.
  • Easy DIY Installation: Designed for homeowners who want to install the system themselves with no HVAC tools or professional technician assistance.
  • 25ft Pre-Charged Line Set: Comes with Quick Connect® fittings and environmentally friendly R-454B refrigerant, simplifying setup and minimizing environmental impact.
  • Inverter Technology: Provides precise, energy-efficient climate control by dynamically adjusting performance based on environmental conditions.
  • Smart Home Integration: Fully compatible with Amazon Alexa, Google Assistant, and the MRCOOL SmartHVAC app for easy remote control and voice activation.
  • Heating & Cooling in One Unit: Offers reliable performance in both heating and cooling modes, making it suitable for year-round comfort.
  • Quiet Operation: Operates with minimal noise, ensuring a peaceful and comfortable environment.
  • 5-Year Compressor & 1-Year Parts Warranty: Enjoy long-term peace of mind with dependable support and protection from a trusted brand.

The MRCOOL DIY® 18K BTU Mini Split System is the perfect combination of performance, efficiency, and convenience—ideal for homeowners, renovators, and DIYers who want professional-grade results without the need for professional installation.

View More DIY Mini Split Systems

Specifications

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Brand MRCOOL SKU DIY-18-HP-C-230D25-O
Weight 93 Manufacturer MRCOOL
HSPF2 11.5 Cooling BTU 18000 BTU
Heating BTU 18000 BTU Refrigerant R454B
SEER2 22 Compressor Type Rotary
Liquid Line 1/4" Suction Line 1/2"
Max Breaker Size 20A BTU/Tonnage 18,000 BTU/1.5 Ton
Zone Compatibility Single Zone Height 26.5"
Width 35.04" Depth 13.46"

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Brand MRCOOL SKU DIY-18-HP-WMAH-230D25-O
Weight 35 Manufacturer MRCOOL
Refrigerant R454B Liquid Line 1/4"
Suction Line 1/2" Max Breaker Size 15A
BTU/Tonnage 18,000 BTU/1.5 Ton Height 13.19"
Width 42.52" Depth 8.9"
Warranty

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Warranty Coverage
Parts 1 Year
Compressor 5 Year

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Warranty Coverage
Parts 1 Year
Compressor 5 Year
Documents

MRCOOL 18,000 BTU DIY 5th Generation Mini-Split Condenser 230V DIY-18-HP-C-230D25-O

Submittal
Service Manual (English)
Installation Manual
Warranty
Owner's Manual

MRCOOL 18,000 BTU DIY 5th Generation Mini-split Air Handler 230V DIY-18-HP-WMAH-230D25-O

Submittal
Service Manual (English)
Installation Manual
Warranty
Owner's Manual

Shipping

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Reviews

Customer Reviews

Be the first to write a review
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