What's in the box
- 1 × MRCOOL® DIY® 9K 5th Gen Condenser— DIY-09-HP-C-115D25-O
- 1 × MRCOOL® DIY® 9K 5th Gen Air Handler — DIY-09-HP-WMAH-115D25-O
- 1 × 25 ft. Quick Connect® Line Set , 1/4" × 3/8"
- 1 × MRCOOL® Remote Control
- 1 × DIYPRO® Cable
- Installation documentation
The MRCOOL® DIY® 5th Gen is designed with DIY-friendly Quick Connect® technology to simplify installation compared with a conventional mini split system.
- Review the complete installation manual before purchasing and installing the system.
- Confirm the required 115V electrical supply and installation location before ordering.
- Electrical requirements, permits and building codes vary by location.
- Licensed electrical or HVAC work may still be required depending on local regulations and installation conditions.
- Always follow MRCOOL® installation instructions and applicable local codes.
- Base Parts Warranty: 5 Years
- Base Compressor Warranty: 7 Years
- Eligible for the MRCOOL® Care Program
Please review the manufacturer warranty documentation for complete coverage terms, registration requirements and eligibility conditions.
- Free Shipping: Available on eligible orders to the Lower 48 states and Washington, D.C.
- HVAC Systems: Shipped by freight with FREE Curbside Delivery to your property.
- Smaller Items: Shipped by standard parcel carrier, such as FedEx or UPS.
- 30-Day Returns: Return requests can be submitted within 30 days of delivery.
- Return Condition: Products must be new, unused, uninstalled and in their original packaging.
- Return Charges: Return shipping and restocking fees may apply depending on the product and reason for return.
- View our Full Shipping Policy and Full Returns Policy.
Manuals & documents
MODEL: DIY-09-HP-WM-115D25-O
Complete MRCOOL® DIY Mini Split System
This complete single-zone system includes the matching 9,000 BTU wall-mounted indoor air handler, 115V outdoor heat pump condenser, and 25 ft. pre-charged Quick Connect® line set.
MRCOOL's Quick Connect® technology is designed to simplify installation by allowing the pre-charged refrigerant lines to be connected without the traditional vacuuming and refrigerant charging process associated with conventional mini split installations.
The included DIYPRO® cable adds another purpose-built component for the MRCOOL DIY installation system.
Heating & Air Conditioning in One System
The MRCOOL DIY 5th Gen 9K provides both air conditioning and heat pump heating, giving you one system for year-round room comfort.
Its variable-speed DC inverter compressor can adjust output as room conditions change rather than operating only at full power. This helps maintain more consistent temperatures while supporting efficient operation.
For rooms that stay too warm, too cold or are difficult to condition evenly with a central HVAC system, a dedicated single-zone ductless mini split provides independent comfort exactly where it is needed.
Smart, Quiet Comfort
Control your MRCOOL mini split using the included remote or your smartphone through the SmartHVAC® app.
The system also works with Amazon Alexa and Google Assistant, giving you convenient smart-home temperature control.
Why You’ll Love It
- 9,000 BTU single-zone ductless mini split
- 10,000 BTU heating capacity
- Heating and air conditioning in one system
- ENERGY STAR® certified
- High-efficiency 23.6 SEER2 performance
- 115V electrical configuration
- Complete indoor and outdoor system
- Includes 25 ft. pre-charged Quick Connect® line set
- Uses R-454B refrigerant
- Variable-speed DC inverter technology
- SmartHVAC® Wi-Fi app compatible
- Works with Amazon Alexa and Google Assistant
- Follow Me®, Dry Mode and Quiet Mode
- Indoor operation as low as 18 dB(A)
- Gold Fin® condenser protection
- 7-Year Compressor / 5-Year Parts Base Warranty
Best For
Bedrooms • Home Offices • Guest Rooms • Studios • Small Living Areas • Additions • Individual Comfort Zones • Rooms Without Existing Ductwork
Need More Heating & Cooling Power?
If your space is larger, has high ceilings, large windows, poor insulation, or stronger heating and cooling demands, a larger system may be a better fit.
Explore larger MRCOOL® DIY options:
12K BTU Mini-Split Systems
18K BTU Mini-Split Systems
24K BTU Mini-Split Systems
36K BTU Mini-Split Systems
Multi-Zone Mini-Split Systems
| Coverage Area | Up to 400 sq ft |
| Cooling Capacity | 9,000 BTU |
| Heating Capacity | 10,000 BTU |
| Voltage | 115V |
| Zone Type | Single Zone |
| SEER2 | 23.6 |
| EER2 | 14 |
| HSPF2-4 | 11.5 |
| HSPF2-5 | 8.6 |
| Indoor Sound Level | 18–43 dB(A) |
| Outdoor Sound Level | 54 dB(A) |
| WiFi Compatible | Yes |
| Voice Assistant | Alexa & Google Assistant |
| Inverter Technology | DC Inverter |
| Refrigerant | R-454B |
| Line Set Length | 25 ft |
| Max Line Set Length | 82 ft |
| Line Sizes | 1/4" Liquid / 3/8" Suction |
| Compressor Type | Rotary |
| Certifications | AHRI, UL, ETL, Energy Star® |
| Warranty | 7-Year Compressor / 5-Year Parts |
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
What installation requirements apply to this product?
Installation requirements vary by product type. Selected complete MRCOOL® DIY systems are designed for homeowner installation when fitted in line with the manufacturer’s instructions, local codes and permit requirements.
Central HVAC systems, including Universal®, VersaPro®, Central Ducted Hyper Heat and packaged systems, are intended for professional installation by a qualified HVAC contractor. Licensed electrical work may also be required.
Components, thermostats, controls, line sets and accessories should be installed according to their product documentation and compatibility requirements. Always review the product page, manufacturer guidance and warranty conditions before installation.
Will I need any additional parts, tools or professional services?
Additional requirements vary by product and installation. Tools, electrical materials, mounting hardware, connecting components or other installation supplies may be required unless specifically stated as included.
Review the product description, specifications, installation information and What’s Included section, where available, before ordering.
Where can I find product documents or installation instructions?
Available specifications, installation instructions, owner’s manuals and manufacturer documents are provided on the product page where applicable.
Some simple accessories may not have a separate installation manual. Contact our team if you need help locating documentation for a particular product or model.
Sizing & Compatibility
How do I confirm this product is compatible with my equipment?
Review the product type, model number, dimensions, voltage, capacity, refrigerant type, connection sizes and compatibility information shown on the product page, where applicable.
Components, thermostats, controls and accessories must be matched to compatible equipment. Contact our team before ordering if you are uncertain about compatibility.
What should I check before ordering?
Confirm the product name and model number, together with any relevant dimensions, voltage, capacity, refrigerant type, connections and installation requirements.
For replacement components and accessories, compare the product specifications with your existing equipment and the relevant manufacturer documentation before placing your order.
What is included with this product?
The supplied items are listed in the What’s Included section or product description, where applicable. Only the products, components and accessories specifically stated are included.
Electrical materials, mounting equipment, connecting components or other installation supplies may need to be purchased separately unless expressly stated otherwise.
Warranty & Support
What warranty coverage applies to this product?
Warranty coverage varies by product and model. Eligible MRCOOL® products are covered according to the manufacturer’s warranty terms, registration requirements and installation conditions.
Accessories and individual components may have different coverage. Cool Heat Direct can provide available warranty documentation and general guidance, while warranty eligibility and claim decisions are determined by the manufacturer.
How can I get help before ordering?
Email support@coolheatdirect.com with the product name or model number and details about your project or existing equipment.
For compatibility questions, include the model numbers of any products you intend to connect, control, replace or use together.
Support hours: Monday–Friday, 9 AM–6 PM ET.
Shipping & Returns
How will my order be shipped?
Free standard shipping is available on eligible orders to the Lower 48 states and Washington, D.C.
Orders are generally processed within 3–5 business days, followed by approximately 5–12 business days in transit. Delivery timing varies by product availability, destination and carrier scheduling.
Smaller products may ship by parcel carrier. Larger equipment may be delivered curbside by freight carrier. The carrier may contact you to arrange a delivery appointment.
Can I return this product?
Return requests may be submitted within 30 calendar days of delivery. Products must be new, unused and uninstalled and, where applicable, unpowered. They must also be complete and in their original manufacturer packaging. Prior written authorization is required.
For approved change-of-mind returns, incorrect sizing or customer ordering errors, the customer is responsible for return freight and a 15% restocking fee applies.
Verified damaged, defective, incorrect or incomplete orders are handled separately under our full policy.
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