Room Air Conditioner - Size Guide

Issue

  • What size unit AC do I need
  • How many BTUs do I need

Applies to

  • Room Air Conditioners

Solution

The size of the air conditioning unit needed will depend on the size of the room you wish to cool. To determine which size unit will best cool your room, we will need to determine the square footage of your room.

How to find room square footage

  1. Measure the length and width of the room
  2. Multiply those numbers togethers, to get the room square footage.

What does BTU mean?

BTU stands for British Thermal Unit, a unit of measurement for heat energy. It's used to measure the amount of heat needed to raise or lower the temperature of one pound of water by one degree Fahrenheit. BTUs are commonly used in the HVAC industry to determine the efficiency of appliances, such as air conditioners and furnaces.

BTU Chart

NOTE: These are general guidelines to determine sizing for an AC unit and do not account for vaulted ceilings and a properly insulated room. If you need more information please contact a AC professional.

BTUs

Sq. Ft.

Cool Area

5,000

Up to 150

10' x 15'

6,000

Up to 250

10' x 25'

7,000

Up to 300

15' x 20'

8,000

Up to 350

14' x 25'

9.000

Up to 400

16' x 25'

10,000

Up to 450

18' x 25'

12,000

Up to 550

22' x 25'

14.000

Up to 700

25' x 28'

15,100

Up to 850

25' x 34'

18,500

Up to 1,050

30' x 35'

22,000

Up to 1,300

30' x 34

25,000

Up to 1,600

40' x 40'

28,500

Up to 1,900

38' x 50'

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