Our water heater is in a small ecnlosure on the back porch.
In winter time the outside temp can drop into the 30's.
I know that modern water heaters are well insulated,
but there's gotta be some heat loss if the surrounding
air is 35 degrees.....
Use a "blanket" over the water heater ?
I recently became very familiar with gas water heaters as I planned to replace
mine. I have since done so.
The <ahem> STANDARD insulation is R8. The high efficiency models are R16. R8
isn't much, IMHO.
I have considered one myself but my heater is in our living (heated) space.
With the exception of the months that I am cooling (a/c), there isn't enough
to be gained adding a blanket for it to be worth the time and expense in my
case. In your case, yes. As the other poster said he has done, you might
even consider TWO. In an unheated space, they might pay for themselves in a
The standard 6 year heaters are not well insulated, they are usually R7. The
better ones are still only R15 or so, not optimal for your 100+ degree
differential. A blanket or two will absolutely help if the heater is outdoors.
The heater jacket doesn't really feel that warm to the touch as the steel shell
rapidly gives up the heat. But *after* you put a blanket on it, place your hand
underneath. It will be very warm indeed in there.
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