Loss of heat, especially from a building as a consequence of poor insulation or construction.
 this double wall also protects against heat loss
 Example sentencesExamples
-  The clear night skies will ensure the maximum of heat loss by overnight radiation.
 -  Low-emission coatings are applied to the inside surface, which reduces heat loss through the glass.
 -  The drier the soil, the lower the heat loss.
 -  An improperly fitting cover can cause vapour release, which results in heat loss.
 -  Consider using insulating curtains to reduce excessive heat loss from large windows at night.
 -  The north wall is filled with styrofoam insulation to stop heat loss.
 -  Newer, more energy-efficient storage models can significantly reduce the amount of standby heat loss.
 -  Openings designed to provide enough light under an overcast sky impose a heat loss penalty on a winter's night.
 -  Adding storm windows can cut the heat loss in half.
 -  Upper floor rooms are set back from the exterior wall to reduce heat loss from their windows.