Never heard of such a thing SM....recirculating the hot like that.....is it effecient? I just doesn't seem like it would be, but I dunno? I've never had a frozen pipe issue ever in any of my houses though....with no extra precautions...knock on wood.
Oh yeah....it's 6 degrees outside right now, about 10 inches of snow on the ground, and I'm beginnng to think ALL Canadians, Crowbob, and a few other are bat schit crazy....brrrr is right
Oh yeah....it'll be near 60 in a few daze though....