I am working my way up to an all electric system using 10 gallon coolers.
In the meantime, I'm getting two 10 gallon rubbermaid coolers from THD to start. I'll be using the HLT cooler as a "passive" HLT until I get the heating element added (and all the 240v stuff done).
How much heat loss can I expect in the HLT? I can use my heatstick to bump up the temp, if needed, but would prefer to just fill it with hot water to sit until needed.
I know in my current 5 gallon Igloo cooler MLT, I get almost no heat loss over an hour or so, especially if the cooler is full of mash.