It costs three to five times as much to remove a BTU of heat from a house in the summer as it does to add one BTU of heat in the winter.
The Owner Built Home: A How-to-do-it Book (1972)
It costs three to five times as much to remove a BTU of heat from a house in the summer as it does to add one BTU of heat in the winter.
The Owner Built Home: A How-to-do-it Book (1972)