How can a large production hall or warehouse with the ceiling height over 10 meters be heated? An air heating system based upon an INTERBLOCK steam generator is the most effective and economical solution to this problem. How does it work? The steam gained from the steam generator heats the water. The hot water is directed to a heat exchanger where it passes heat to the air. The heated air is supplied to the premises, whereas the cooled water goes back for heating. A steam generator can be installed directly in the room that needs heating. There is no emission of combustion products. Heat losses during pumping of heat carrier through pipes are close to zero.