According to the types of equipment in the wall tankless water heaters can be used: natural draft, forced draft, electric ignition, pezorozzhig, standard expansion tank, a special modulation expansion tank. Tankless water heaters different capacity, functionality can be one-and bypass.
If you can not connect to a centralized gas supply system, in private homes and not only using electric tankless water heaters. They have a higher expenditure than gas, but their cost is lower, they are quite compact and can be installed directly into the room and not deliver the inconvenience in the operation of noise emissions.
inexpensive expansion tank heating system Modern direct heating electric tankless water heaters Stiebel Eltron, for example a series of SCAT, regardless of the characteristics of the heating systems provide high efficiency at the expense of high-tech equipment. The control panel is different availability, you can easily set the pot on the desired mode of operation.