What's in the box
- MRCOOL® Smart Wi-Fi Mini Stat (Model MST05)
- Table Stand & Wall Mount Kit
- Power Adapter
- User Manual & Warranty Information
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.
Manuals & documents
MODEL: MST05
Smart, Adaptive Comfort for Every Room – No Wires, No Worries
The MRCOOL® Smart Wi-Fi Mini Stat (Model: MST05) delivers advanced temperature control with built-in AI, voice commands, and multi-platform connectivity. Designed for MRCOOL® mini split systems—including Breeze Max—it puts precision climate control at your fingertips, whether you're at home or away.
Installation is simple and DIY-friendly, with flexible mounting options: wall-mounted using the included adapter or placed on a table with the built-in stand. Control your environment via the touchscreen, SmartHVAC® app, or hands-free through Alexa, Google Assistant, or Siri.
Smart features like Comfy Max™, 7-day scheduling, usage history, and location-based automation allow the Mini Stat to adapt to your lifestyle, eliminating waste while maintaining optimal comfort.
Even without Wi-Fi, the Mini Stat remains fully functional, allowing local temperature control anytime. Backed by a 1-Year Warranty, it’s smart, reliable climate control—reimagined for modern living.
Why You’ll Love It
✅ Voice-Control Ready — Works with Alexa, Google Assistant, Siri & MRCOOL® Link
✅ Location-Based Automation — Adjusts temperature as you arrive or leave
✅ Comfy Max™ AI Logic — Prevents overcooling or overheating based on your preferences
✅ Global Remote Access — Control your comfort from anywhere in the world
✅ DIY Installation — Wall mount or freestanding setup included
✅ 7-Day Smart Scheduling — Custom routines for every day of the week
✅ Energy Usage History — Track trends and optimize savings
✅ Touchscreen Display — Easy, intuitive in-room controls
✅ One App for All — Connects to your existing MRCOOL® HVAC systems with the SmartHVAC® app
✅ 1-Year Warranty — Backed by MRCOOL’s trusted quality
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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