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Is it safe to put two fermwraps on top of each other over a fermentor?

Last month I made a few saisons at 80*F, and was able to maintain that temperature with a single fermwrap. Now, for some reason, a single fermwrap is only getting the temperature to 72*F. I haven't ...
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Is there a Material Difference between Fermwraps and Non-Branded fermwraps?

Here is a "Carboy Heater" from Adventures in Homebrewing. Here is an "Electric Fermentation Heater" from Northern Brewer. I just learned yesterday that "Fermwrap" is a product from MoreBeer. Looking ...
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At what point on a Yeast's Optimal Temperature Range should the power to a Fermwrap be turned off?

I finally hooked a PowerSwitch Tail II up to my Raspberry Pi and Fermwrap. The RPi has DS18B20 temperature probes directly measuring the temperature of the wort by going down through the airlock. For ...
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Fermwraps and Contact with Towels or Cardboard ** Safety Question

I have four carboys in the closet and four in my bedroom on account of doubling production. The carboys in the bedroom have towels wrapped around them to prevent sunlight from hitting them. I ought ...
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780 views

How to Use a Johnson Digital Temperature Controller with a Fermwrap - General Questions

This is my first temperature controller and first use of a Fermwrap. I understand that the Johnson A419 Temperature Controller can only do hot or cold at one time. Which mode does it default to when ...