When you replace one of your windows with double glazing, why doesn’t the house fall down? This is because there is a lintel above the window that holds up the bricks. This lintel has to go right the way through
Smart Heating Systems
The central heating in my shared house is controlled by a white plastic box on the wall. This winter it broke down. I spent several hours downloading the 20 page manual from the internet and reading it. So far I