The All purpose heater Multiheat HW unit with unique air distribution unit. The Multiheat HW unit consists of a high efficiency heat exchanger, axial fan and a unique designed distribution device. Hot water is supplied from an external boiler and passes the heat exchanger. The fan sucks the air from inside the building through the heat exchanger and pushes the warm air equally through the 6 air outlets. The amount of air and the directions can be adjusted by the flaps inside each air outlet.