water heater insulation

Old 03-01-21, 09:17 AM
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Join Date: Jan 2016
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water heater insulation

I did some work on Bradford White MITW40L6BN gas water heater for my friend. After I had left, he found a small rectangular piece of insulation near the unit. It probably fall out when I removed a cover to access reset button/thermostat. I didn't notice it at the time and didn't put it back.
He is afraid to reinstall it himself and I don't feel like driving back to his house right away just to reinstall a piece of insulation.
I wonder if the heater will work less efficiently and/or the cover will get hot enough to burn someone without this piece?
Old 03-01-21, 09:23 AM
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Join Date: Mar 2003
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Yes, without the little square of insulation it will be very slightly less efficient. I certainly would not make a special trip to put it back in.

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