The family of gaSteam humidifiers includes the 45 kg/h, 90 kg/h and 180kg/h models. Each of these features the highest thermal efficiency, so as to fully exploit the cost savings of gas. The heat exchanger, which is easily removable for cleaning, is made from aluminium alloy coated with a special corrosion-proofing and non-stick treatment that prevents the adhesion of lime scale. The gaSteam humidifiers all come with the new pHC electronic microprocessor controller that adopts all the best features of the pCO programmable controllers, one of CAREL’s main points of excellence. The user interface is made up of a backlit display that features the simultaneous and flexible use of graphic icons and texts in various languages. The pHC controller also comes with network connection: via the pCO family pLAN protocol (RS485 interface included), or the Modbus®, Echelon®, BACnet™, RS485 and GSM communication protocols using optional interfaces. The controller includes the independent control loop (humidity or temperature) with active probe and optional second limit probe, as well as the ON/OFF and proportional operating modes with signal from an external controller. It can also manage a dehumidifier, and includes a complete set of diagnostics for maintenance. Safety gaSteam is fitted with various safety devices, including: • pre-mix, room-sealed burner with forced ventilation; • an air/gas control valve with double closing; • safety negative pressure switch on combustion air intake; • temperature sensor in the flue gas outlet that checks for malfunctions, and signals excessive accumulation of lime scale on the exchanger in advance; • a flame detector in the burner that closes the gas valve in the event of operating anomalies; • the patented AFS antifoam system with corresponding sensor; • a multi-stage water level sensor; • an automatic water conductivity control system to avoid corrosion Added advantages • continuous modulation from 25 to 100% (12.5% for the 180 kg/h model); • low NOx emissions; • boiler and components in contact with the water in AISI 304L stainless steel; • pre-heating function for a faster response; • supply with mains water or demineralised water. The control can be set for use with softened water, within the limits described in the reference tables; • antifreeze function; • precision ± 2% rH.