Did you see my picture of a 15 gallon drum? Your corny keg will bee just fine...
Huaco, I did see the pic. How you wrapped it is what I was somewhat concerned about. You have a slight overwrap and there are sections of the drum not covered by the heat tape. I am just wondering about the uniformity of heat exchange (no hotspots/coldspots) and I don't necessarily want to wrap it spiral-like as you have. My cornies average 27" in circumference and I was thinking that I could have the 12" heat tape cut to this and would wrap around with no overlap and not off kilter. The only thing is my cornies stainless steel sections are about 18" in height so this configuration would leave about 3" below and above with no heat tape coverage. Will the heat transfer from the tape warm the lower and upper sections and if so will it do it evenly?
I just bought a fermwrap heater with a Johnson temp controller. While I know it's not supposed to feel hot to the touch, should it at least feel warm? It doesn't feel like it's working and my carboy temp dropped to 60 from a 70 degree set point last night.
Currently have the fermwrap plugged directly into the outlet to see which part may be failing. The controller appears to at least be attempting to call for wrap to be on.
when I first started using it, I wondered the same thing. however, it was able to keep an ale at fermentation temperature while I laggered another beer in the same chamber. so yes, it undoubtedly works very well!