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AC Unit Guide

Select the Best AC Units for Your Apartments

Help tenants stay happy, lower costs and keep turn low with the right air conditioning units for your multifamily property. Multifamily apartments and single-family homes are simply different and have different cooling needs. When it comes to AC units, bigger isn't better. Follow this guide, measure your units accordingly and select the best, most efficient AC units for your apartments.

Find the Right Size Unit

Determine the right size AC unit for each of your apartments’ cooling needs using our chart on BTUs per area.

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BTUS Per Area


100 – 150 sq. ft.

5,000 BTUs/Hr.

150 – 250 sq. ft.

6,000 BTUs/Hr.

250 – 300 sq. ft.

7,000 BTUs/Hr.

300 – 350 sq. ft.

7,000 BTUs/Hr.

350 – 400 sq. ft.

9,000 BTUs/Hr.

400 – 450 sq. ft.

10,000 BTUs/Hr.

450 – 550 sq. ft.

12,000 BTUs/Hr.


550 – 700 sq. ft.

14,000 BTUs/Hr.

700 – 1,000 sq. ft.

18,000 BTUs/Hr.

1,000 – 1,200 sq. ft.

21,000 BTUs/Hr.

1,200 – 1,400 sq. ft.

23,000 BTUs/Hr.

1,400 – 1,500 sq. ft.

24,000 BTUs/Hr.

1,500 – 2,000 sq. ft.

30,000 BTUs/Hr.

2,000 – 2,500 sq. ft.

34,000 BTUs/Hr.

Measuring Square Footage

Measuring Square Footage

Find the square footage of each apartment with a few simple measurements. The area of a square or rectangular room is calculated by multiplying its length by its width. A triangular space's area is calculated by multiplying its length by its width and dividing by two.

AC Unit

Bigger Isn’t Better

Choose the right size AC units for efficient, comfortable and cost-effective results. Many property owners install oversized AC units because they believe bigger means better cooling. It does not. Oversized units may cool rooms more quickly, but they do not properly remove humidity. This leaves rooms feeling unpleasant, damp and clammy. Properly sized units remove the right amount of humidity as they cool, reducing cooling and maintenance costs.