Posted by:
DMong
at Thu Nov 12 16:58:00 2009 [ Email Message ] [ Show All Posts by DMong ]
72 to 86 would be pretty optimum in my opinion, bu it has to be big enough that it can choose anywhere in between this without being forced to either extreme. It really doesn't matter too much what the cool side is though, as long as it can get to the heat. It could even be 50 degrees in a garage as long as it could thermoregulate itself with the heat source well.
I still don't see how you can get heat to get through a solid two inches of sand. The heat source would have to be set too high and then your asking for a fire hazard. it is MUCH better to use a much thinner layer, or like I mentioned earlier, shredded aspen, or even heat treated mulch if you want a better look. This will allow the heat to penetrate without having to turn it up so much.
If you were to read about all the catastrophes I've heard about over the years, you would know what I'm talking about. Many people have killed their animals, as well as burned their house down because of this. So plan on the side of safety whatever you do. Two inches of sand is like the heat pad having to penetrate the same thickness of concrete, it is the same density.
A couple threads down yesterday this very thing happened.
~Doug
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"a snake in the grass is a GOOD thing" 
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RE: Newb question regarding temperatures. - DMong, Thu Nov 12 16:58:00 2009