Regarding your article on cool roofs, the concept appears very beneficial, but Baltimore also has a winter season ("Push urged for more cool roofs in Baltimore," Oct. 13).

There was not one word relating to the fact that though the white "cool" roofs reflect 80 percent of the sunlight in summer, I could use that 80 percent during the winter when my furnace is trying to make up for the loss that I am now denied because of my "cool" roof.

Obviously what is needed is a roof which turns energy-reflecting white when it is hot outside but energy-absorbing black when it is cold.

George B. Wroe, Glyndon