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MRCOOL Smart Thermostat

Total: $164.00

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  • Product Description
  • Spec. & Dimensions
  • Reviews
  • Sizing Guide
  • Warranty & Manuals
  • Shipping Policy
  • FAQ

📑 Smart Thermostat Brochure

Achieve the Ideal Home Climate!

Experience the perfect home climate where comfort meets energy efficiency with the MRCOOL® Smart Thermostat. This innovative device transforms your air conditioner into a smart powerhouse, allowing you to take control of your cooling and heating from anywhere using your phone. Enjoy effortless control and enhanced comfort with a thermostat that adapts to your lifestyle.

What Makes the MRCOOL® Smart Thermostat Unique?

  • Personalized Thresholds: Customize your temperature settings to suit your comfort and efficiency needs.
  • Smart Schedules: Align your thermostat settings with your daily routine, whether you’re home, away, or asleep.
  • Smart Energy Management: Optimize energy usage and enhance cost savings by actively monitoring your heating and cooling patterns.
  • One App for All Your HVAC Systems: Manage all your HVAC units seamlessly through a single, user-friendly app.
  • Global Control for Remote Accessibility: Control your home’s temperature from anywhere in the world.
  • Location-Based Automation: Automatically adjust your home’s temperature based on your location using geofencing.
  • Vacation Mode: Save energy while you’re away by setting your thermostat to vacation mode.
  • DIY-Friendly Installation: Install your thermostat easily and quickly with our hassle-free setup process.

How Does the MRCOOL® SmartHVAC App Enhance Your Experience?

The MRCOOL® SmartHVAC app is your energy-saving partner, making smart thermostats even smarter. Here’s how it works:

  • Hassle-Free Registration: Get started quickly with guided prompts and a user-friendly interface.
  • Personalized Thresholds for Ultimate Comfort: Set custom temperature thresholds to align with your comfort and efficiency goals.
  • Smart Schedules Aligned with Your Routine: Use preset schedules or create your own for a perfectly tailored home environment.
  • Smart Energy Management: Monitor and optimize your energy usage to achieve optimal efficiency.
  • One App for All Your HVAC Systems: Control both central and room air conditioners for enhanced convenience and savings.

Why Choose Global Control and Location-Based Automation?

  • Global Control for Remote Accessibility: Your home’s temperature is always at your fingertips with the MRCOOL SmartHVAC app.
  • Location-Based Automation: Enjoy personalized comfort and energy savings as your thermostat adjusts automatically when you come and go.

How Can You Track and Optimize Energy Usage?

Transform the way you manage energy consumption with real-time tracking. Monitor and tweak your usage to ensure efficient living and smart savings. Simplify tasks with smart features and reduce energy usage automatically.

What Systems Are Compatible with the MRCOOL® Smart Thermostat?

The MRCOOL® Smart Thermostat supports a wide range of residential systems (24V AC), including:

  • Dual Fuel Systems: All types of furnaces/boilers and heat pumps, supporting up to 4 stages of heating and 2 stages of cooling.
  • Heat Pumps: Supports up to 2 stages of heating and cooling.
  • Conventional Heating and Cooling: Suitable for all types of air conditioners, boilers, and furnaces, supporting up to 2 stages of heating and cooling.

What Are the Specifications and Upcoming Features?

  • Dimensions (LxWxH): Net: 3.9"x3.9"x1", Packing: 6.5"x5.37"x2.12"
  • Weight: Net: 177.5g (6.26oz), Packing: 428.8g (15.12oz)

What's Next for MRCOOL®?

Coming soon: MRCOOL® Link, a cloud-based platform designed to maximize savings by pairing an existing air source heat pump with integrated controls, reducing reliance on fossil fuel-based heating sources. With MRCOOL® Link, users can:

  • Link multiple HVAC units, including central or mini-split heat pumps and fossil fuel heating systems.
  • Minimize the usage of fossil fuel heating.
  • Maximize the utilization of central or mini-split heat pumps.

What Warranty is Offered with the MRCOOL® Smart Thermostat?

Rest assured with the MRCOOL® Smart Thermostat, which comes with a 3-year parts warranty, guaranteeing reliable performance and peace of mind.


  • 📑 Smart Thermostat Brochure

    Achieve the Ideal Home Climate!

    Experience the perfect home climate where comfort meets energy efficiency with the MRCOOL® Smart Thermostat. This innovative device transforms your air conditioner into a smart powerhouse, allowing you to take control of your cooling and heating from anywhere using your phone. Enjoy effortless control and enhanced comfort with a thermostat that adapts to your lifestyle.

    What Makes the MRCOOL® Smart Thermostat Unique?

    • Personalized Thresholds: Customize your temperature settings to suit your comfort and efficiency needs.
    • Smart Schedules: Align your thermostat settings with your daily routine, whether you’re home, away, or asleep.
    • Smart Energy Management: Optimize energy usage and enhance cost savings by actively monitoring your heating and cooling patterns.
    • One App for All Your HVAC Systems: Manage all your HVAC units seamlessly through a single, user-friendly app.
    • Global Control for Remote Accessibility: Control your home’s temperature from anywhere in the world.
    • Location-Based Automation: Automatically adjust your home’s temperature based on your location using geofencing.
    • Vacation Mode: Save energy while you’re away by setting your thermostat to vacation mode.
    • DIY-Friendly Installation: Install your thermostat easily and quickly with our hassle-free setup process.

    How Does the MRCOOL® SmartHVAC App Enhance Your Experience?

    The MRCOOL® SmartHVAC app is your energy-saving partner, making smart thermostats even smarter. Here’s how it works:

    • Hassle-Free Registration: Get started quickly with guided prompts and a user-friendly interface.
    • Personalized Thresholds for Ultimate Comfort: Set custom temperature thresholds to align with your comfort and efficiency goals.
    • Smart Schedules Aligned with Your Routine: Use preset schedules or create your own for a perfectly tailored home environment.
    • Smart Energy Management: Monitor and optimize your energy usage to achieve optimal efficiency.
    • One App for All Your HVAC Systems: Control both central and room air conditioners for enhanced convenience and savings.

    Why Choose Global Control and Location-Based Automation?

    • Global Control for Remote Accessibility: Your home’s temperature is always at your fingertips with the MRCOOL SmartHVAC app.
    • Location-Based Automation: Enjoy personalized comfort and energy savings as your thermostat adjusts automatically when you come and go.

    How Can You Track and Optimize Energy Usage?

    Transform the way you manage energy consumption with real-time tracking. Monitor and tweak your usage to ensure efficient living and smart savings. Simplify tasks with smart features and reduce energy usage automatically.

    What Systems Are Compatible with the MRCOOL® Smart Thermostat?

    The MRCOOL® Smart Thermostat supports a wide range of residential systems (24V AC), including:

    • Dual Fuel Systems: All types of furnaces/boilers and heat pumps, supporting up to 4 stages of heating and 2 stages of cooling.
    • Heat Pumps: Supports up to 2 stages of heating and cooling.
    • Conventional Heating and Cooling: Suitable for all types of air conditioners, boilers, and furnaces, supporting up to 2 stages of heating and cooling.

    What Are the Specifications and Upcoming Features?

    • Dimensions (LxWxH): Net: 3.9"x3.9"x1", Packing: 6.5"x5.37"x2.12"
    • Weight: Net: 177.5g (6.26oz), Packing: 428.8g (15.12oz)

    What's Next for MRCOOL®?

    Coming soon: MRCOOL® Link, a cloud-based platform designed to maximize savings by pairing an existing air source heat pump with integrated controls, reducing reliance on fossil fuel-based heating sources. With MRCOOL® Link, users can:

    • Link multiple HVAC units, including central or mini-split heat pumps and fossil fuel heating systems.
    • Minimize the usage of fossil fuel heating.
    • Maximize the utilization of central or mini-split heat pumps.

    What Warranty is Offered with the MRCOOL® Smart Thermostat?

    Rest assured with the MRCOOL® Smart Thermostat, which comes with a 3-year parts warranty, guaranteeing reliable performance and peace of mind.


  • Product Specifications
  • MRCOOL DIY Mini Split Sizing Guide

    Which air handler is best for your room size?

    The size of your room is the main factor in choosing the right unit. MRCOOL DIY 4th Gen comes in various sizes, each designed to cool and heat specific square footage ranges.

    Here's a quick reference for choosing the right BTU based on your room size:

    • 9,000 BTU covers up to 375 square feet.
    • 12,000 BTU covers up to 550 square feet.
    • 18,000 BTU covers up to 800 square feet.
    • 24,000 BTU covers up to 1,050 square feet.
    • 36,000 BTU covers up to 1,550 square feet.

    How BTU Limits Work in Your Mini-Split System

    You can opt for high BTU air handlers for strong heating and cooling. But, if you plan to run multiple air handlers at the same time, consider the main unit's (condenser) maximum power.

    Here’s the deal: Suppose your condenser can handle 18,000 BTU, and you have two indoor air handlers, each at 12,000 BTU. If both run simultaneously, they’ll automatically adjust to 9,000 BTU each to match the condenser's limit. This ensures the system runs safely.

    If you usually run one air handler at a time, a lower BTU condenser might be sufficient. But if you plan to use all air handlers together, a higher BTU condenser is the way to go. This lets you enjoy the full power of each air handler without overloading the system.

    By considering these factors, you can ensure your MRCOOL DIY 4th Gen unit is perfectly sized for your needs, keeping you comfortable year-round.

    For personalized assistance or further clarification, please feel free to contact our customer support via chat or call. Our team is ready to help you make the best choice for your cooling needs.

  • DIY Multi-Zone Manuals

    MRCOOL DIY Mini Splits Warranty

    MRCOOL distributor (hereinafter “Company”) warrants this product against failure due to defects in materials or workmanship under normal use and maintenance as follows:

    • Standard Warranty: 5-year parts warranty and 7-year compressor warranty.
    • Limited Lifetime Compressor Warranty: Available if specific conditions are met.

    Conditions for Limited Lifetime Compressor Warranty:

    • Registration: The unit must be registered at the following web address: https://mrcool.com/warranty within 60 days of the installation date.
    • MrCool Care Program Enrollment: The original, registered owner must enroll in the MrCool Care program within 4 months from the installation date. This program requires a biannual fee and includes a DIY cleaning kit for regular maintenance.
    • Regular Maintenance: The unit must be cleaned biannually using the MrCool Care kit as part of the preventative maintenance to ensure proper function throughout its lifespan.

      Coverage Details:

      • Within the First 7 Years: If compressor failure occurs, verified by diagnostic testing performed by a certified HVAC technician, the warranty provides one entire unit replacement (equipment only).
      • After 7 Years: The limited lifetime compressor warranty covers the cost of a replacement compressor (equipment only).

      Important Notes:

      • The warranty does not cover any costs incurred for diagnosis or replacement of equipment.
      • If the original owner does not register the unit, the warranty defaults to the standard 5-year parts and 7-year compressor warranty.

      📑 DIY Multi-Zone Brochure

      📑 Quick Start Setup Guide

      📑 Installation Owner's Manual

      📑 Performance Specification

      📑 Troubleshooting Solution Guide

      📑 Remote Control User Manual

      📑 Ceiling Cassette Manual

      📑 Ceiling Cassette Specification

      📑 Warranty Statement

      📑 Multi-Zone AHRI Certifications: 18K BTU - 27K BTU - 36K BTU - 48K BTU

      📑 Multi-Zone Energy Guide Certifications: 18K BTU - 27K BTU - 36K BTU - 48K BTU

    1. Shipping and Delivery Policy: Important Information and Customer Responsibilities

      • Free shipping is only for kept orders. If customers want to return their items, they will need to pay for shipping back to us and the original shipping cost, as we do not get a refund for that.
      • Processing and shipping durations are approximate, and unforeseen setbacks may arise from circumstances like weather conditions, natural catastrophes, or logistical challenges.
      • Tracking information is typically available within 1-3 days after shipping. If the tracking number is not functional at the time you check, please wait 24 hours before contacting us as updates may take time.

      Journey to Delivery: A Two-Part Timeline

      1. Processing Time

        • Order verification takes on average 24 hours.
        • Accessories-only orders dispatch in 1-2 business days.
        • Complete system orders take 2-3 business days.
      2. Shipping Time

        • Accessories are typically delivered in 2-4 business days.
        • A complete system may take up to 7 business days, which can vary, especially in remote areas.

      Freight Shipments

      • Freight shipments may face delivery restrictions in residential areas due to factors such as narrow roads or restrictions on delivering to apartment buildings above the ground floor.
      • Deliveries are only made to the front of the building and not up the stairs to the door.
      • In the event of a missed delivery, any issues or extra costs incurred will be the responsibility of the customer.
      • To avoid any problems or returns, it is important for the customer to arrange delivery and be prepared to pick up the shipment at the shipping facility if a failed delivery attempt occurs.

      Customer Responsibilities

      • Customers are responsible for providing complete and accurate shipping addresses to FrosthubUSA.com.
      • We're unable to make changes to your shipping address once a package leaves our warehouse, and we're not liable for packages that are lost due to incomplete or inaccurate addresses.
      • All orders reported as "Delivered" by shipping companies are considered delivered, and FrosthubUSA.com cannot be held liable for non-delivery in this case.
      • If a delivery fails for any reason and the address provided by the customer was correct, FrosthubUSA.com cannot be held liable if a package is returned to our warehouse.
      • The order placed by the customer on our website is the order FrosthubUSA.com will ship to the customer. We cannot be held liable for the customer receiving the wrong item if they placed the wrong order.

      Equipment Arrival

      • Shipping transit times are not guaranteed and may vary depending on your delivery address.
      • Once your order arrives, make sure to inspect each and every item on the pallet. Count the number of items (boxes) on the shipment. Ensure your count matches the count printed on the delivery receipt before signing for your delivery.
      • Missing items or incorrect items that were noted on the delivery receipt must be reported within 24 hours of receiving your order by contacting our customer service department.
      • We reserve the right to reject any claim for missing items if not reported within the twenty-four-hour period.
      • After taking count of the pieces on your shipment, remove wrapping or boxes and inspect each item of equipment thoroughly in the presence of the driver.
      • Do not sign the delivery receipt until you have thoroughly inspected each item. Check all of the equipment to make sure it is not dented or badly scratched.
      • Make sure to mark the delivery receipt clear, short, wrap broken, or damaged after inspecting your shipment thoroughly.

      Making Notes on the Delivery Receipt

      • The customer is responsible for ensuring that the products being received are free of damages and/or shortages.
      • If the items or boxes on the shipment do not match the number listed on the delivery receipt, mark the receipt as short. A packing slip will be attached to the shipment for your reference. Ensure to note on the delivery receipt which items are missing.
      • We will work with the shipping company to track the missing items. Please allow up to 7 business days for the shipping company to locate your items.
      • If the shipping company is not able to locate the missing items, we will ship those items via standard ground shipping to you at no charge if the receipt was noted as short and the items that are missing are noted on the delivery receipt.
      • If the shrink wrap is torn or has been replaced during transit, mark the receipt as 'wrap broken'.
    2. Frequently Asked Questions

      The MRCOOL Smart Thermostat is a device designed to optimize your home climate by balancing comfort and energy efficiency. It allows you to control your air conditioner and heating system remotely via your smartphone.

      The key features include: Personalized Thresholds, Smart Schedules, Smart Energy Management, One App for All Your HVAC Systems, Global Control for Remote Accessibility, Location-Based Automation, Vacation Mode, DIY-Friendly Installation.

      The thermostat allows you to create personalized thresholds and smart schedules, optimizing your HVAC system's performance to reduce energy usage. Smart energy management features help monitor and manage your energy consumption more effectively.

      Yes, you can control the thermostat remotely using your smartphone through the MRCOOL SmartHVAC app. It provides global control and remote accessibility, allowing you to adjust settings from anywhere.