MRCOOL® Smart Thermostat – 24V Wi-Fi Thermostat with Voice Control (Alexa, Google, Siri)

MODEL: MST04

Smart Comfort Meets Total Control — Wherever You Are

The MRCOOL® Smart Thermostat (Model: MST04) delivers intelligent, intuitive, and energy-efficient control for your home. Designed for easy DIY installation and powered by voice control, touchscreen access, and app-based automation, this 24V thermostat is the ideal upgrade for modern households.

Create the perfect atmosphere with pre-set modes like Home, Away, Sleep, or Vacation, and manage your system from anywhere with the Smart HVAC app. Fine-tune fan speeds, track usage trends, and monitor filter cleaning reminders with ease. Whether you use Alexa, Google Assistant, Siri, or MRCOOL® Link, control is always within reach.

Advanced location-based services automatically adjust your comfort levels when you're arriving or leaving home. Even if the Wi-Fi goes out, you're still in control through the device’s built-in interface. Backed by a 3-Year Warranty, the MST04 puts smart comfort and efficiency right at your fingertips.

Why You’ll Love It

✅ DIY-Friendly Install — No pro needed; set up quickly and easily

✅ Multi-Platform Control — Works with Alexa, Google Assistant, Siri & MRCOOL® Link

✅ Vacation & Smart Modes — Stay energy efficient while you’re away

✅ Location-Based Automation — Adjusts temperature as you come and go

✅ Track & Optimize Usage — Built-in system history and energy monitor

✅ Preset Modes — Home, Away, and Sleep modes tailored to your lifestyle

✅ Works Without Internet — Local touchscreen control always available

✅ One App for All Systems — Control everything in the SmartHVAC® app

✅ Backed by Warranty — 3-Year Parts Warranty for peace of mind

Specifications

Specifications at a Glance

Attribute	Details
Equipment Type	Smart Thermostat
Voltage	24V
Reading Temp Range	0°F – 99°F
Setpoint Temp Range	45°F – 90°F
Pre-Set Modes	Home, Away, Sleep, Vacation
Wi-Fi Enabled	Yes
App Compatibility	iOS & Android
Voice Compatibility	Alexa, Google Assistant, Siri
Warranty	3-Year Parts Warranty
Net Dimensions (WxHxD)	3.9” x 1” x 3.9”
Net Weight	0.4 lbs
Gross Dimensions (WxHxD)	5.37” x 2.12” x 6.5”
Gross Weight	0.95 lbs

What’s Included:

• MRCOOL® Smart Thermostat MST04 (24V)

• Mounting Kit

• User Manual

• SmartHVAC® App Integration Guide

Installation

Installations & Manuals

Product Brochure

Installation Manual