The campfire was initially, next yet for a long time. However, the last half century saw a significant development in heating technology. Nowadays it is not the flames that give the warmth of the home. The selection of the heating equipment, such as boilers, heat storing appliances, heat pumps, central heating, etc. is so large that even specialists are sometimes confused. At present these specialists play a more significant role in the western parts of Europe than in Hungary, where people are still more inclined to DIY. This primarily Hungarian phenomenon entails certain perils in addition to enlivening the economic palette, since no-name brands may appear just to disappear within a short time. The future of building services engineering lies in the hand of experts, but its history lies open for everyone.