How to Calculate a Correct Split Unit

Create a refreshingly cool room environment with the aid of an air conditioner. Home owners can choose which type of air conditioning unit will work the best for their space. Air conditioners are available in multiple styles, including: portable, single room, large capacity and multiple room. As part of ensuring the best air flow for a room cooling unit, it is essential to first calculate the room's split unit to determine what you need in an air conditioner.

tape measure

Instructions

- 1
  Measure the length and width of the area you want to keep cool with an air conditioner. Add these measurements together to determine the total square feet of the area.
- 2
  Calculate the BTU number by multiplying the room's total square footage by 25.
- 3
  Check the room for certain conditions that will require additional BTUs to be added to your score. For example, rooms where the ceiling lacks insulation get 4,000 more BTUs. If more than two people will be in the room on a regular basis, add 600 BTUs. Rooms with windows get 1,500 extra BTUs. Subtract 1,000 BTUs if the room you are cooling is located on a building's shaded side.
- 4
  Factor in the additional BTU components and calculate the final BTU number for the room you are wanting to cool. This final BTU level is the air split unit for an area.
- 5
  Compare the split unit to each air conditioner's capacity level to determine which machine will be the best fit for the area you want to cool. For example, portable air conditioners range from 7,500 to 14,000 BTUs, single air conditioner units range from 6,000 to 10,000, multiple air conditioner units cover from 10,000 to 16,000 BTUs and large capacity units range from 16,000 to 28,000 BTUs.

How to Connect an RTH7600 Honeywell Thermostat

My Hot Water Heater Is Making a High-Pitched Noise

Heating & Cooling Repair