24 - Maintenance and servicing of boilers and air conditioning systems

Maintenance and servicing of boilers and air conditioning systems shall be carried out at least yearly, or more often if so required by law or need, by appropriately qualified professionals, following CEI and national standards where these apply, or according to the manufacturer’s instructions._x000B_For air conditioning systems the maintenance (check for leakage and repair) has to be carried out according to Regulation (EC) No 842/2006 of the European Parliament and of the Council ( 2 ), in line with the amount of F (fluorinated green­house) gas contained in the application, as follows:_x000B_• at least once every twelve months for applications containing 3 kg or more of F gases (this shall not apply to equipment with hermetically sealed systems, which are labelled as such and contain less than 6 kg of fluorinated greenhouse gases), - at least once every six months for applications containing 30 kg or more of F gases,_x000B_• at least once every three months for applications containing 300 kg or more of F gases._x000B_