Before choosing the product, you can consider the following inputs that may help you decide on the air-conditioner that best suits your requirements.
Size of the air conditioner that you select is the important part of the buying process.
Consider the following points-
If the AC has less tonnage, cooling inside the room will be insufficient and electricity will get wasted because you may need to run it on high all the time.
If the AC tonnage is high, you may need to switch it off regularly when you feel cold. Switching on & off will also lead to waste of energy.
The chart below may help you with making a good choose. However, the effect of cooling are subject to other factors such as air leakage through the window/doors, other equipments inside the room that generate heat, frequent opening of the window/door, radiation of heat from the ceiling/walls, etc.
| Room Size (Sq ft) | AC Tonnage |
| < 90 sq ft | 0.8 ton |
| 90 -125 | 1 ton |
| 125-200 | 1.5 ton |
| >200 | 2 ton |
Portable air conditioners can be moved from room to room and use the same heat-exchange principles as built-in models. This means they can cool and dehumidify the air.
Wall or window models can be installed in a window or an external wall.
Split ACs are generally used to cool one or more rooms, or an open-plan area. A compressor unit is installed outside and then one or two outlets are positioned indoors.
Indicative of the voltage stabilizer to be used:
| Capacity of AC (ton) | Stabilizer (KVA) |
| 0.5~0.8 ton | 2 KVA |
| 1.0~1.2 ton | 3 KVA |
| 1.2~1.6 ton | 4 KVA |
| 2.0 ~2.5 ton | 5 KVA |
| 3 ton | 6 KVA |
Noise level can be checked only during working of the AC. Check with your friends/relatives and obtain their feedback if any.
Consider what the air conditioner will look like when fitted on your wall. Try to choose the colour that blends in with your decor.
Generally, all the functional controls will be available through remote control. Please check.