Hot water boilers are manufactured in a wide range of sizes from 300,000 to 6,800,000 BTU input in straight or propane gas fired models up to 300 PSI and temperatures up to 400 F.Hot water boiler.
A chiller system is used in removing of heat from a liquid (mainly water) by a vapor-compression or absorption refrigeration cycle theories this liquid can then be circulated again and again through a heat exchanger to cool air or equipment as required.