image Air Conditioning Calculator
It is important to chose the correct size of air conditioner for a room. Too small and the air conditioner will be working too hard, the room will not be cool enough and you may get condensation problems. Too large and your air conditioner may be constantly switching on and off.
This calculator is to help you decide what size of air conditioner you will need.

To find the size of air conditioner you will need enter your room size in meters:
meters long by
meters wide =
square meters.
The estimated amount of cooling you will need is:
PK or HP
BTUs
Watts input
Well insulated room
Medium insulated room
Poorly insulated room                          
Standard air conditioner sizes available are:
0.75PK 1PK 1.5PK 2PK 2.5PK
7,200
BTUs
9,600
BTUs
14,400
BTUs
19,200
BTUs
24,000
BTUs
560
watts
746
watts
1120
watts
1,492
watts
1,865
watts
NOTES:
Different brands of air conditioners use different ways of indicating their size, for this reason 3 different size equivalents are given:
  • PK (Dutch for Horse Power or HP) which is the common sizing of air conditioners in Bali.
  • BTUs (British Thermal Units) the common sizing used in America.
  • The electrical power rating in watts (this is input watts not output watts).
The better a room is insulated the less air conditioning you will need. As a rough guide:
  • A well insulated room might have thick solid walls, an insulated ceiling, close fitting doors and few or double glazed windows and not many people in it.
  • An medium insulated room might have solid concrete walls, close fitting doors, an insulated roof and few standard windows.
  • A poorly insulated room might have large window area, poorly fitting doors, a roof or walls that give off heat or a lot of people in it.
Calculation Reference: Mr. Fixit Bali - Specialists in Property Inspection, Renovation and Maintenance - Jalan Bypass Ngurah Rai, Gang Penyu No 1, Sanur, Bali

Creative Commons License You may share this document under Creative Commons License – Terima kasih telah membaca tulisan ini. © 2011 Ari Sulistiono, Indonesian Electrical Engineer.