How to Size a Mini Split

Mini split systems are typically used for additional cooling although some models also provide heating. They are most commonly used on upper floors where it is difficult to provide cooling due to the fact that cold air has a tendency to drop, cooling the lower floors, where the thermostat is normally located, and leaving the upper floor warmer. Mini splits are sometimes used for the whole house, as they can have separate, controllable heads and provide various temperatures based on desire and room usage.

Tape measure
Calculator

Instructions

- 1
  Measure the width and length of the area you want to treat with the mini split with a tape measure. Multiply the measurements to determine the square footage. As an example, a 10-by-20-foot area has a square footage of 200 feet.
- 2
  Calculate the tonnage of cooling required using the general rule that 1 ton of cooling is sufficient for about 400 square feet of space. Ceiling height is a minimal consideration because cool air stays low.
- 3
  Decide on the best layout for the mini split based on the floor plan of the area. Although 1 ton of cooling may be enough for two rooms that have a total square footage of 400 feet or less, a dual-head mini split may be a better option. Multihead splits use one outside condenser to feed multiple indoor units, more effectively dispersing the cool air.

I Can Smell Freon From a Window Air Conditioner

My Central Air Conditioner Is Blowing Low, Not Hard

Air Conditioners