It is very important to have clean air in your home or office. Air conditioners not only provide us with the required cooling, but also help with improving the indoor air quality. The air inside the room is filtered and cleaned by the air filters. The Air Handling Unit of your air conditioner holds your air filters.

As dust accumulates in the filter, the pressure differential between the outlet and the inlet increases. If you measure this pressure differential, you get a good indication about the condition of the air filter. There are some dust particles that are minute and cannot be seen by the naked eye and the filter may look clean. However, you can easily find out whether it is clean or not by checking the pressure.

You can check a few things to determine if you need to change the air filter.

Mechanical strength - The standard pressure of any filter is stated on the product itself. But there are some other factors to be considered the dust in the area, humidity etc.

Bacteria- At times the filter needs to be replaced to prevent the accumulation of harmful micro organisms like bacteria, fungi etc.

Economic considerations- If you do not change the filters for a long period of time, then your operating costs may increase and you may end up spending a lot on your electric bills unnecessarily.

Thus it is very important to change the filters of your air conditioning unit at regular intervals. Make sure that you change the air filters with the help of a professional technician.