I am slowly working towards increased control of my current brew system and wanted to add an electric element to my HLT thru which a 50ft herms coil circulates. I have little to no knowledge of electricity and prefer to buy a prefabricated model. I was looking at the blichman 120V boil coil 10 gal models. The HLT will likely end up being a old 15.5 gal keg but would only hold 10-12 gallons for the HLT and herms coil. My question is does anyone have experience with these? Will it work well on a old keg for an HLT? Again, not looking to boil water obviously in the HLT but more hold temp between 150-180F. Would use a Johnson controller to do that. The heat efficiency calculation blichman lists states it would have an efficiency of ~1-1.5 degrees F per minute heating capability which seems reasonable. Ideally I would opt for a 240V model but that incurs the cost of creating a new outlet which I'm not too interested in. Any thoughts?