MRCOOL®

Frequently Asked Questions (FAQ):

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  • Q. I want to sell MRCOOL® products, how do I sign up?
    A. Fill out the form here, and one of our sales representatives will be in contact with you.
  • Q. How do I register my warranty?
    A. Go to here to file your warranty.
  • Q. How do I find the AHRI number of my unit?
    A. You can find links to the AHRI certificates on the documentation page at mrcool.com/documentation.
  • Q. I have not received my free SWAG item yet, has it been shipped?
    A. Orders typically take 4 to 6 weeks to process and ship. If you have not received your Swag order within 8 weeks – please, contact us via email at swag@mrcool.com
  • Q. On the Multi-Zone do you have to connect all of your air handlers to your condenser?
    A. Some bundles have fewer air handlers than available ports on the condenser, so it is based on the capacity of the air handler.

    You only need to have a minimum of ⅔ load – i.e. if it’s a 3 zone and you buy 3 9K air handlers for it – you can connect it with just 2 to start

  • Q. What size DIY mini-split do I need?
    A. The important factors to consider are:

    • The Size of the Area to Heat / Cool (Square Feet)
    • Your Local Climate (is it extremely hot or cold for extended periods of time?)
    • Insulation (an uninsulated area with drafts will have vastly different requirements than a well insulated area)
    • Basic Sizing based on Square Footage alone:
      • 12k BTU = up to 500 square feet
      • 18k BTU = 450 to 750 square feet
      • 24k BTU = 700 to 1000 square feet
      • 36k BTU = 950 to 1500 square feet
  • Q. Is the Advantage series DIY®?
    A. No, it is not. The Advantage must be installed by a certified HVAC technician.
  • Q. What is the max linset length that can be run on your units?
    A. The max length depends on the unit that is being installed.

    1. DIY Single Zone: 75ft
    2. DIY Multi Zone: 197ft
  • Q. Do your mini-splits have HEPA filters?
    A. Because of the extra filter density required to meet the HEPA specification, HEPA filters only work well at low airflow levels. It is not practical to fit a HEPA filter to a residential split-system air conditioner, as they deliver much greater airflow volumes than dedicated air purifiers. Air flow restriction from a HEPA filter, could cause under-performance or failure in a mini-split or other residential split-system air conditioner.
  • Q. What is the temperature lock out on the DIY?
    A. On the Multi-Zone:

    • Indoors – at the thermostat – on Multi-Zone units the temperature range for cooling can be from 62F to 90F and heating from 32F to 86F.
    • However, the 3rd Gen Multi-Zone 27k and 36k condensers operational range for heating is -13F to 86F (outside temperature), cooling is -13F to 122F (outside temperature).

    On the Single-Zone:

    • Indoors – at the thermostat – on all Single Zone units the temperature range for cooling can be from 62.2F to 89.6F and heating from 32F to 86F.
    • However, the 3rd Gen Single Zone 12K condenser operational range for heating is -13F to 86F (outside temperature), cooling is 5F to 109.4F; The 18k, 24k, 36k condensers operational ranges for heating are -4F to 86F (outside temperature), cooling is 5F to 122F.
  • Q. What is the operational temperature range for the DIY?
    A. On the Multi-Zone:

    • The 3rd Gen Multi-Zone 27k and 36k condensers operational range for heating is -13F to 86F (outside temperature), cooling is -13F to 122F (outside temperature).
    • However, indoors – at the thermostat – on Multi-Zone units the temperature range for cooling can be from 62F to 90F and heating from 32F to 86F.

    On the Single-Zone:

    • The 3rd Gen Single Zone 12K condenser operational range for heating is -13F to 86F (outside temperature), cooling is 5F to 109.4F; The 18k, 24k, 36k condensers operational ranges for heating are -4F to 86F (outside temperature), cooling is 5F to 122F.
    • However, indoors – at the thermostat – on all Single Zone units the temperature range for cooling can be from 62.2F to 89.6F and heating from 32F to 86F.
  • Q. What is the length of your lineguards?
    A. They can cover up to 12 feet.
  • Q. What size Universal system do I need?
    A. The important factors to consider are:

    • The Size of the Area to Heat / Cool (Square Feet)
    • Your Local Climate (is it extremely hot or cold for extended periods of time?)
    • Insulation (an uninsulated area with drafts will have vastly different requirements than a well insulated area)
    • Basic Sizing based on Square Footage alone:
      • 12k BTU = up to 500 square feet
      • 18k BTU = 450 to 750 square feet
      • 24k BTU = 700 to 1000 square feet
      • 36k BTU = 950 to 1500 square feet

    For a basic sizing, you can find Universal Series sizing at mrcooluniversal.com. We suggest you have a certified HVAC technician perform a Manual J load calculation for the most accurate sizing of any HVAC system.

  • Q. Are the Signature Series units DIY?
    A. No they are not, they need to be installed by a certified HVAC technician.
  • Q. Do you have installers? Where can I find a technician to work on my unit?
    A.You may be able to find an installer near you on our Installer Map at mrcool.com/installer-map. If you can’t find one in your area, then any HVAC professional should be able to install and maintain your system.
  • Q. What size electrical wire do I need for my unit?
    A. The manufacturer wire gauge requirements for a given model are listed in the corresponding installation manual provided with the unit. You can also find the manuals at mrcool.com/documentation.
    For Mini-Splits the communication cable (between air handler and condenser) is provided, but the power cable is not.
Last Updated Date: 2/11/22

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