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Air Handler BTU

  • Determine the square footage of the area you want to cool or heat.
  • Consider insulation and climate. If the room has poor insulation or is in a particularly hot or cold climate, you might need a higher BTU rating to compensate.

Coverage Area:

  • 6000 BTU | up to 250 SqFt
  • 9000 BTU | 275 to 375 SqFt
  • 12,000 BTU | 350 – 550 SqFt
  • 18,000 BTU | 550 – 800 SqFt
  • 24,000 BTU | 800 – 1050 SqFt
  • 36,000 BTU | 1050 – 1550 SqFt
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Ceiling Cassette only comes in 6k, 9K, 12K and 18K

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This is the distance between the indoor unit (air handler) and the outdoor unit (condenser).

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Zones

A zone makes up an area that you'd like to cool and heat. Generally, a zone is equivalent to an area that is enclosed, such as a kitchen, living room, bedroom or garage.

MRCOOL DIY System Designer

Design Your MRCOOL DIY Mini Split System

Build a factory-matched heating and cooling package with confidence, room by room, from indoor units to installation components.

DIY Friendly Factory Matched Fast Nationwide Shipping Expert Support
How many rooms or zones do you have?
Learn more about Zones
Room designer

Dial in the comfort plan for each zone.

Each room selection helps pair the correct indoor unit, line set length, and installation components.

Select the square footage, mount type and lineset length per room/zone Your zone/room square footage
 Add Room/Zone
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Factory-matched package

Review your MRCOOL system components.

Your matched condenser, indoor units, line sets, and installation components are organized below.

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Recommended upgrades

Complete your installation package.

Add optional accessories that can make setup, protection, and long-term ownership easier.

Select additional accessories to complete your system
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