In a single family house in Denmark about 35-50% of the total heat loss occurs through the windows. The main problem is the heat loss at night, because during the winter the nights are longer and colder than the days. This can be remedied by applying movable insulation in front of the windows. In this way the heat loss will be reduced and furthermore, also the cold draughts near the window. As external shutters have earlier been investigated, the project "Insulated Shutters" deals with internal insulated shutters for existing buildings and with shutters between two layers of glass for new buildings. Both types of shutters have been tested in a climate chamber and show considerable reduction of the transmission coefficient even for the double pane window when used at night. Thus the annual energy saving will be 900-1400 kWh for a typical Danish single family house with a window area of 20 m**2.
Bibliographic Reference: EUR 9851 EN (1985) MF, 69 P., BFR 150, BLOW-UP COPY BFR 345, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123113000 / Last updated on: 1987-01-01
Available languages: en