Show & Tell: Why do 100-yr-old buildings have high energy costs?
A wooden window frame has a cut-out grid for air flow: in winter, warm air escapes and cool air seeps in -- directly below the hot water pipe that feeds the radiator and bathroom.
A wooden window frame has a cut-out grid for air flow: in winter, warm air escapes and cool air seeps in -- directly below the hot water pipe that feeds the radiator and bathroom.