This all depends on various factors. 

1- the environment your air conditioning is situated in.

2- the size of your system will depend on how often your F-gas will need to be checked. 

3- how often its used.

we would be able to evaluate this for you and give you an option which is usually on an Annual or Bi-Annual basis.

This would usually happen if your air conditioning systems are not being serviced properly or it is in a poor environment with little fresh air supply or extraction.

We would always disinfect all air conditioning systems when we carry out a service which is one of the many checks carried out by ourselves. 

if we discover the environment is of poor air quality, we will provide a plan of action for this to be rectified.

The simple answer to this is yes, new air conditioning systems have inverter technology which are rated A+++ on energy consumption rating.