What's in the box
- MRCOOL® 24K DIY® 5th Gen Mini-Split Condenser
- 25ft DIYPro™ Communication Cable
- Installation Accessories
- MRCOOL® Warranty Documents
Manuals & documents
MODEL: DIY-24-HP-C-230D25-O
High-Capacity, DIY-Ready Comfort for Spaces up to 1,000 sq. ft.
The MRCOOL® 24K BTU DIY® 5th Generation Mini-Split Condenser delivers reliable, energy-efficient heating and cooling for larger rooms and open-plan areas without the need for a professional installer. Perfect for living rooms, open-plan studios, garages, and retail spaces up to 1,000 sq. ft.
This user-friendly system comes pre-charged with eco-safe R-454B refrigerant and a 25-foot Quick Connect® line set, making installation fast and clean with no vacuum pump or HVAC technician required. The durable DIYPro™ communication cable eliminates the need for electrical conduit while offering added protection against weather and outdoor elements.
Enjoy seamless control via the SmartHVAC® app, Amazon Alexa, or Google Assistant, or use the included wireless remote. The Gold Fin® condenser coating ensures extra corrosion resistance, ideal for coastal and humid areas.
Engineered for efficiency and convenience, this condenser includes Auto Mode, Energy-Saving Timer, Auto Restart, and Anti-Mildew Protection for cleaner, fresher air. It’s backed by one of the strongest warranties in the HVAC industry.
Why You’ll Love It
✅ Perfect for Larger Rooms — Designed for living rooms, open-plan spaces, and workshops up to 1,000 sq. ft.
✅ True DIY Installation — Pre-charged Quick Connect® line set and DIYPro™ cable simplify setup with no specialty tools or installers needed
✅ Smart-Home Compatible — WiFi-enabled for SmartHVAC® app, Alexa, and Google Assistant voice control
✅ Gold Fin® Condenser Protection — Resists corrosion in coastal and high-humidity environments
✅ Quiet Operation — Smooth, low-noise performance at just 58.5 dBA
✅ Eco-Friendly Refrigerant — Pre-charged with efficient R-454B
✅ Industry-Leading Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor Warranty, 5-Year Parts Warranty
Important:
Always consider additional factors such as ceiling height, insulation quality, sun exposure, number of windows, climate, and the number of heat-producing appliances in your space when choosing the right system.
What You Need for a Complete System
To achieve full heating and cooling performance, pair this condenser with:
-
MRCOOL® DIY® 5th Gen Air Handler (230V Compatible)
-
MRCOOL® Quick Connect® Pre-Charged Line Set (25ft included)
-
DIYPro™ Communication Cable (25ft included)
Optional Accessories:
-
MRCOOL® Wall Mount Bracket
-
Additional Quick Connect® Line Sets
-
Coupler Kits for line set extensions
Note: This condenser is compatible exclusively with MRCOOL® DIY® 5th Gen Single-Zone Air Handlers (230V). Not compatible with 3rd or 4th Gen systems.
| Attribute | Details |
|---|---|
| Voltage | 208/230V |
| Phase | 1 |
| Cycle | 60 Hz |
| Cooling Capacity | 24,000 BTU |
| Heating Capacity | 24,000 BTU |
| Max Coverage Area | 1,000 sq. ft. |
| SEER2 | 22.7 |
| EER2 | 12.7 |
| HSPF2-4 | 9.5 |
| HSPF2-5 | 7.1 |
| Compressor Type | Rotary |
| Inverter | DC |
| WiFi Compatible | Yes |
| App Compatibility | iOS & Android |
| Voice Control | Alexa & Google Assistant |
| Corrosion-Resistant | Gold Fin® Coating |
| Net Dimensions (WxHxD) | 37.24" x 31.89" x 16.14" |
| Net Weight | 122.8 lbs |
| Warranty | Lifetime Limited*, 7-Year Compressor, 5-Year Parts |
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.

