Ilungele ntoni i-air source water heater?

Iqhekeza elinye lombane linokufumana iziqwenga ezine zamanzi ashushu. Ngaphantsi komlinganiselo ofanayo wokufudumeza, isifudumezi samanzi esinamandla omoya singonga malunga ne-60-70% yeebhili zombane ngenyanga!