Heating installation for the use of primary energy for generating and storing heat
DE3115681A1
Heating installation of a central heating system
DE3000090A1
Combined supply and discharge channel for heat recuperation - has lower and upper chamber separated by horizontal partition, with drain water in lower chamber and heat rail in upper one
DE3000089A1
Wind power operated power plant - has wind breakers on support frame mounted in front of wind driven wings
