You can save on the heat energy of the house, that is, the entrances – just by setting the heat meter to the entire house or entrance, as well as insulation of the windows and doors of the entrance. The counter, of course, is very expensive, which can scare away the elderly pensioners who live next to you and will also have to pay for its installation from their pocket. However, according to the experience of many cities, he pays off for the first heating season.