I don't know what the kit costs. I have a contractors account so the prices are different. Just look at the price on the page and add $50 or so for shipping. The hot water idea isn't necessary. Just get them good and HOT for a couple days. Maybe three days. They won't cool down in the time it takes to spray the foam. It would take hours for them to cool down in a New England winter. I've experimented with the smaller 200' kits. The 600' kits will obviously keep their heat longer as there is smaller foam to surface area ratio.
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