Thanks George, I found my notes on the prices, the 24x15 is $45, and the 4'x20" is $74. I have thought about my heating pad but don't want to do anything dangerous. I also found one for $25 but they can't tell me how big it is, maybe 10"x10" what good is that? I'll keep checking, thanks for the info. Jane >> >I found heat mats for $40.00 apiece in Peaceful Valleys catalog. They're an >odd size, 15"X25". I live in a highly industrialized area, $50 billion in >heavy industry, mostly refineries and chemical plants, and most of my >clients are technical contractors. Can generally always find a used >industrial alternative to the expensive stuff out of gardening catalogs. I >believe vendors know what suckers we gardeners are. > >George