Just as a heads up I use a rack. A VE-6 to be exact. I found that the cold side temp is regulated quite well by the heat tape on the hot side. My house is at 74, and the cold side is about 78-79. Hot side is set at 94, but that makes 89 in the tub. I measure the temp 1 time a day at least. usually 2 - 3 times a day.
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