Cd|KOH|NiOOH

Zn|NH4CI|MnO2

Li|LiClO4|MnO2

Pb|H2SO4|PbO2

H2|KOH|O2

Usage of fuel elements in house building

Problems of using fuel cells as both electric and heat energy sources are reviewed. Such "hybrid" fuel cells possess enhanced net efficiency up to 90%. Some examples of fuel cells sets use in dwelling from small cottages up to multi-storey hotels are presented.