What's in the box
- MRCOOL® 9K DIY® 5th Gen Mini-Split Condenser (115V)
- 25ft DIYPro™ Communication Cable
- Installation Accessories
- MRCOOL® Warranty Documents
Free curbside shipping on eligible MRCOOL® systems across the continental U.S. Most products ship in 3–5 business days and arrive in 4–10 days, depending on your location. Freight carriers will call to schedule delivery.
Returns accepted within 30 days on new, unopened items in original packaging. A restocking fee of up to 35% may apply for HVAC equipment — we’ll always confirm before issuing a return authorization.
Each MRCOOL® system is backed by manufacturer warranty coverage as defined by product and model — typically 5–10 years on major components. Register your system after installation to activate full coverage.
Need help with sizing, voltage or compatibility? Email support@coolheatdirect.com — our U.S. team replies within one business day.
MODEL: DIY-09-HP-C-115D25-O
Effortless, Ultra-Efficient Heating & Cooling for Spaces up to 350 sq. ft.
Take total control of your indoor comfort with the MRCOOL® 9k BTU DIY® 5th Generation Mini-Split Condenser. Specifically designed for easy, tool-free, and no-vacuum installation, this compact but powerful unit is perfect for bedrooms, home offices, dens, or workshops up to 350 sq. ft..
Paired with the pre-charged 25-foot Quick Connect® line set filled with eco-friendly R-454B refrigerant, this condenser makes setup fast, safe, and simple — no professional HVAC service required. The included DIYPro™ Communication Cable eliminates the need for electrical conduit, offering extra durability against outdoor elements, animals, and yardwork mishaps.
Connect and control your system from anywhere with the SmartHVAC® app, Amazon Alexa, or Google Assistant. The built-in Auto Restart function restores your previous settings after a power outage, while multiple operating modes and energy-saving features keep your space perfectly balanced year-round.
Protected by a Gold Fin® anti-corrosion coating, this condenser is built to withstand harsh coastal and humid climates. It’s backed by one of the strongest warranties in the business for total peace of mind.
Why You’ll Love It
✅ Pererfect for Smaller Spaces — Ideal for bedrooms, offices, or small apartments up to 350 sq. ft.
✅ DIY-Friendly Installation — Quick Connect® pre-charged line sets and DIYPro™ cable simplify setup.
✅ Smart-Home Ready — Wi-Fi enabled and compatible with the SmartHVAC® app, Alexa, and Google Assistant.
✅ Auto Restart Function — Automatically restores previous settings after a power outage.
✅ Anti-Mildew Protection — Helps reduce moisture buildup and prevent mold inside your air handler.
✅ Gold Fin® Condenser Protection — Resists corrosion in coastal and high-humidity areas.
✅Ultra-Quiet Operation — Runs as low as 54 dBA outdoors for a peaceful environment.
✅ Industry-Leading Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor, 5-Year Parts.
What’s Included:
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MRCOOL® 9K DIY® 5th Gen Mini-Split Condenser (115V)
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25ft DIYPro™ Communication Cable
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Installation Accessories
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MRCOOL® Warranty Documents
Specifications at a Glance
| Attribute | Details |
|---|---|
| Voltage | 115V |
| Phase | 1 |
| Cycle | 60 Hz |
| Color | White |
| Max Coverage Area | Up to 350 sq. ft. |
| Cooling Capacity (BTU) | 9,000 |
| Heating Capacity (BTU) | 10,000 |
| SEER2 | 23.6 |
| EER2 | 14 |
| HSPF2-4 | 11.5 |
| HSPF2-5 | 8.6 |
| Decibel Rating (Outdoor) | 54 dBA |
| Inverter | DC |
| Refrigerant Type | R-454B |
| Refrigerant Volume (oz) | 30.34 |
| Max Line Set Length (ft) | 82 |
| Compressor Motor Type | Rotary |
| Wi-Fi Enabled | Yes |
| App Compatibility | iOS & Android |
| UL/ETL Listed | Yes |
| AHRI Certified | Yes |
| Warranty | Lifetime Limited*, 7-Year Compressor, 5-Year Parts |
| Net Dimensions (WxHxD) | 30.12" x 21.85" x 11.93" |
| Gross Dimensions (WxHxD) | 36.22" x 27.56" x 16.54" |
| Net Weight | 83.11 lbs |
| Gross Weight | 65.48 lbs |
| Contains Electronics / Chemicals / Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
Room Size & BTU Coverage Guide
Choosing the right BTU (British Thermal Unit) output ensures your space stays consistently comfortable all year round.
| BTU Rating | Ideal Room Size |
|---|---|
| 9,000 BTU | 250 – 400 sq. ft. |
| 12,000 BTU | 400 – 600 sq. ft. |
| 18,000 BTU | 600 – 1,000 sq. ft. |
| 24,000 BTU | 1,000 – 1,300 sq. ft. |
| 36,000 BTU | 1,300 – 1,800 sq. ft. |
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:
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MRCOOL® DIY® 5th Gen Air Handler (115V Compatible)
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MRCOOL® Quick Connect® Pre-Charged Line Set (25ft included)
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DIYPro™ Communication Cable (25ft included)
Optional Accessories:
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MRCOOL® Wall Mount Bracket
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Additional Quick Connect® Line Sets
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Coupler Kits for line set extensions
Note: This condenser is compatible exclusively with MRCOOL® DIY® 5th Gen Single-Zone Air Handlers (115V). Not compatible with 3rd or 4th Gen systems.
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.
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