How to select the right capacity of Air conditioner

Last Update Date : Mar 21. 2018

[Related Symptom]

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Less cooling. Capacity of unit is according to the size of the room.

 

[Cause]

Under and over sized units installed.

 

[Solution]

Follow this calculation to check the right capacity of Air conditioner.

 

Capacity Calculation - Factors to be considered

● Area of the room – (L x W x H )  

● Window area exposed to Sun (West Facing)

● Window area exposed to Sun (Other Direction)

● Wall area exposed to Sun (West Facing)

● Wall area exposed to Sun (Other Direction)

● Wall area not exposed to Sun

● Ceiling area exposed to Sun

● Ceiling area not exposed to Sun

● Number of occupants

● Number of electrical / electronic equipment.  

 

 Capacity Calculation

Do the heat load calculation (Score) of installation place by using the above chart.

 

Example:

The room size is 15X12 X10 feet (LWH) having 6X6 feet window, west facing, on top floor, 4 residents are there and 500Watts Electrical appliance is used by them.

 

Heat Load calculation

 

The Score of calculation is 16 points and I ton AC unit is recommended.                              

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