Question 1

How many tons of AC do I need for a room?

Accepted Answer

A quick estimate is about 1 ton per 150 sq ft, adjusted for ceiling height, sunlight, insulation, and occupancy.

Question 2

Does sunlight exposure affect AC tonnage?

Accepted Answer

Yes. Direct sunlight increases cooling load, so west-facing or poorly shaded rooms often need more capacity.

Question 3

Can an oversized AC be a problem?

Accepted Answer

Yes. Oversized ACs can short-cycle, cool unevenly, and remove less humidity, so sizing should be practical rather than simply larger.

Question 4

Does this replace a professional heat-load calculation?

Accepted Answer

No. It is a practical estimate. Large rooms, top floors, glass walls, and commercial spaces benefit from professional load calculation.