An energetic model of a typical log home was placed in ten different regions of Russia and examined the yearly heating energy demand. The building was supplied with three different types of windows to demonstrate the effect of windows on the heating energy demand. In a 108 m 2 building, changing the 3.5 W/m 2 K thermal insulation capacity windows to 1.4 W/m 2 K and 0.7 W/m 2 K windows caused an energy saving of 11.9% and 15.9% heating energy respectively. In a heated space reducing the night temperature by 2 degrees Celsius can result in only a 2.7%(1 865 kWh) saving in the colder Magadan region, while in the Mediterranean Krasnodar, there was a 4.48%(1 151 kWh) saving of the net heating energy amount. Calculations estimated that Russia possesses a very significant heating potential savings.