[QUOTE=revansCAAD8;4807779]Thank you, I too am interested in a way to slightly warm my Carboys (Better Bottle) and fermenters (plastic) in my CBCooler during the winter. Think Fermwrap would be safe for them and/or the cooler bag? If not, maybe insulate between or lay the fermwrap down under them? Oh and I do have a DIY STC-1000 temp controller I could possible use with it.
Using a Fermwrap is safe with our fermentation coolers as long as you don’t heat above 115 degrees F. This was as hot as we could get using a standard 40 watt Fermwrap in our fermentation cooler. This should be well above any desired fermentation temperature for beer anyway!
As for Better Bottle it looks like you should be good as well!
I found this listed on their website:
“Use a heating belt or heating wrap with BetterBottle Carboys? – Many winemakers and brewers do so regularly and without any problems. However, bear in mind that the upper temperature limit for BetterBottle carboys is 60°C (140°F). Do not attach a wrap-style or belt-style heater to an empty carboy or to a section of a carboy that is not filled with liquid and apply power. The liquid may be necessary to draw away heat and prevent the surface temperature from rising too much. If you have doubts about how hot your wrap or belt is heating the surface of your carboy, slip a liquid crystal temperature strip capable of reading up to 70°C (158°F) underneath, as a check. Place the label side of the strip toward the carboy so you can read it through the carboy. “
Hope this helps!