this also provides the possibility to adjust the electricity need according to demand and prices in the times of high electricity prices the pumps can be turned off and instead heat produced with fuels in heatonlyboilers or chp plants there are some peak boilers in district heat networks or industry utilizing electricity but they have not been widely used partly this is due to electricity taxation the electricity used forthe heat production in taxed quite heavily in the nordic countries which increases the cost of heat production leanheat offers building owners optimization tools that reduce the cost of heating and enable preventive maintenance of buildings