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MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Condenser 230V, DIY-MULTI3-18HP230D-O
Regular Price
$1,555.00
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MRCOOL® DIY 5th Gen 3-Zone Multi-Zone Mini Split Condenser
Model: DIY-MULTI3-18HP230D-O
Introducing the all-new 5th Generation MRCOOL® DIY® Multi-Zone Mini Split Condenser, engineered for maximum comfort, efficiency, and convenience. With the ability to cool and heat multiple zones independently, this system is ideal for small homes, apartments, home offices, or workshops. Thanks to its DIY® Quick Connect® pre-charged line sets and intuitive design, you can install it yourself without the need for special tools or HVAC certification.
Key Features
- DIY Installation: Tool-free, vacuum-free setup with no prior experience required
- DIY® Quick Connect® Line Sets: Pre-charged with environmentally friendly R-454B refrigerant
- Smart HVAC Control: Control each zone via the MRCOOL® SmartHVAC® app, Amazon Alexa, or Google Assistant
- DIYPRO® Cable: Durable armored cable eliminates the need for electrical conduit
- Gold Fin® Condenser: Corrosion-resistant coating ideal for coastal environments
- Industry-Leading Warranty: 7-Year compressor, 5-Year parts, and Limited Lifetime Replacement Warranty with registration in the MRCOOL® Care Program
- Certified Quality: Intertek listed 5031495 for tested safety and performance
Air Handler Compatibility
This condenser supports up to three indoor air handlers with a maximum combined capacity of 24,000 BTU. Available air handler sizes: 6K, 9K, and 12K BTU.
Examples of Compatible Combinations:
- 6K + 6K + 12K (24,000 BTU)
- 6K + 9K + 9K (24,000 BTU)
- 6K + 6K + 9K (21,000 BTU)
- 6K + 9K + 6K (21,000 BTU)
- 9K + 9K (18,000 BTU – one port unused)
- 6K + 12K (18,000 BTU – one port unused)
Recommended Wire Sizing
- Recommended: 12 AWG copper wire – safe for 18A minimum circuit ampacity
- One Size Smaller (14 AWG): Not recommended – may overheat under full load and violate electrical code
- One Size Larger (10 AWG): Offers lower voltage drop and extra safety margin
Ideal Coverage Area
Perfect for spaces ranging from 750 to 1,100 sq. ft., depending on your climate zone and insulation quality.
Note: Always verify system configuration before purchasing. Specifications may change during production. Images may be representative only.
Buy from MRCOOL DIY Direct — the USA’s most trusted HVAC dealer for do-it-yourself heating and cooling solutions.
Specifications & Dimensions
| Specification | Details |
|---|---|
| Model Number | DIY-MULTI3-18HP230D-O |
| Cooling Capacity | 18,000 BTU/h |
| Heating Capacity | 19,000 BTU/h |
| Recommended Coverage Area | 750 – 1,100 sq. ft. |
| SEER2 | 20.5 |
| EER2 | 11.5 |
| HSPF2-4 | 10.3 |
| HSPF2-5 | 8.5 |
| Power Supply | 208-230V, 60Hz, 1 Phase |
| Minimum Circuit Ampacity | 18 A |
| Maximum Fuse | 25 A |
| Refrigerant Type | R-454B |
| Refrigerant Charge | 67.37 oz |
| Line Set Sizes | 3/8" Liquid x 5/8" Gas |
| Net Dimensions (WxDxH) | 37.24" x 16.14" x 31.89" |
| Net Weight | 122.80 lbs |
| Recommended Wire Size | 12 AWG (recommended for 18A load) |
| One Size Smaller (Risk) | 14 AWG – May overheat or fail to meet code under full load |
| One Size Larger (Benefit) | 10 AWG – Increased safety margin and reduced voltage drop |
FAQs About Our HVAC Products
Ordering & Compatibility
1. Do you sell HVAC equipment to homeowners and DIY installers?
Yes. Freedom HVAC Supply sells HVAC equipment and parts to contractors, property owners, and qualified DIY installers. Some products may require professional installation based on local codes.
2. How do I know if this HVAC product is compatible with my system?
Product pages include specifications and compatibility details. If you’re unsure, our team can help verify fit before you order.
3. Can HVAC contractors purchase from Freedom HVAC Supply?
Absolutely. We work with licensed HVAC contractors, installers, and professionals nationwide.
Installation & Support
1. Do HVAC systems require professional installation?
Some HVAC equipment must be installed by a licensed professional to meet code requirements or warranty terms. Always review manufacturer guidelines.
2. Can you help me choose the right HVAC system or part?
Yes. Our support team can assist with product selection based on your application, space, and installation needs.
3. Do you provide installation manuals or documentation?
Manufacturer installation guides and documentation are included or available upon request for most products.
Warranty & Shipping
1. Do HVAC products include a manufacturer warranty?
Most HVAC equipment includes a manufacturer warranty when installed according to guidelines. Warranty terms vary by brand and product.
2. Do you ship HVAC equipment nationwide?
Yes. We ship HVAC systems and parts throughout the continental United States using trusted freight and parcel carriers.
3. What should I know about freight delivery for HVAC equipment?
Larger HVAC equipment ships via freight and should be inspected upon delivery. Delivery details are provided during checkout.
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