At 06:46 PM 2/1/2007, you wrote: >In the airconditioning business they call that Duct >board. Any >airconditioning,(Heating for you Yankees) supply house >will carry it. If you have a friend in the business >ask him to get it for you. Walk ins will pay a high >price. (Randy Smith) ++++++++++++++++++++++++++++++++++++++++++++++++
What I used is a foam siding material, 1/2 inch foam with foil on both sides. I got a 4' X 8' sheet from the lumber yard for $8.89. Enough to build two heaters. Larry Flesner
