Also, today released combined heating boilers that can run on both gas and diesel fuel on, sometimes even without replacing the burner (eg, acv, Ivar, etc.). Continue to learn more with: David S. Levine. Their can be used to guard against disruptions in gas supply, as well as in the case, for example, if your house is located in the new settlement, gas is expected in just a few years. Finally, heating a small private home (especially those far from the "benefits of civilization") or giving, you can use solid fuel heating boiler (Viessmann, Buderus, Dakon, etc.), working with wood, coal, pellet (granular bio-fuels), etc. In this case will have to take care of the harvesting of fuel and to prepare a room for storage. And also to prepare for the fact that from time to time (from one to several times a day) you will be working as a fireman. Efficiency solid fuel boilers are generally not exceed 70-80%, but its persistence is very high (due to residual heat). For good reason, and also limited the possibility of using automation: solid fuel feed impossible to regulate without direct human intervention. Power boiler heating should be selected on the basis of 120 watts per square meter rooms with windows or exterior walls, and 100 watts per square meter of space, they are not having. On the result to "throw" another 20% because working at the limit of the power boiler will last a long time. On the other hand, the boiler heating system, selected with unreasonably large reserve capacity, may serve more less due to the inevitable heat of combustion chamber (until burnout).