The SEC-K can control the ventilation rate so minimising energy consumption and associated costs. It monitors the carbon dioxide level and temperature of the kitchen. At busy times, as the kitchen temperature and/or the carbon dioxide increases, the ventilation rate will be increased and then automatically decreased after a busy period. This means that the ventilation rate, from the default minimum, is controlled by monitoring the kitchen atmosphere. This also ensures that if the extract grease filters are not cleaned regularly the gas will be isolated should the CO2 level rise above 2,800 ppm. Where any fans are not running the gas will be isolated to follow BS6173/2009. A check for gas leaks is carried out at switch on because even where flame safety devices are fitted to all the kitchen appliances should the gas supply be interrupted during service these devices can take up to 10 seconds to operate. This means the gas pressure downstream of a closed valve can be at zero necessitating an integrity check of the pipework as required. Natural & LPG gas as well as CO2 detectors can also be connected to the SEC-K.