Hot Water Boilers - HVAC Hydronic Heating - People who use boilers for their main source of heat report that they love the kind of heat that a boiler provides, whether they have a hot water steam boiler. If you were thinking that there really is only one type of heat, you may want to reconsider. All you have to do is add adjectives to the beginning of the word heat. There is dry heat, wet heat, drafty heat, even heat, and uneven heat just to mention a few. The heat will give you even, draft-less heat. That is opposed to drafty, uneven heat that heat pumps and forced air systems provide.