Nature & Environment
Energy in buildings
...technology is described later in section 3.4. [Described image] Figure 26 (a) The Brunck Estate in Ludwigshafen, Germany (b) Laying blocks of foam insulation on a roof Monitoring showed that the net space heating energy use fell by a factor of seven from 210 kWh per square metre of floor area per year to only 30 kWh m2 yr–1. This is equivalent to 3 litres of heating oil...