I have an Instagram Pot Immersion Cooker that I got for Christmas. My previous practice was to heat the Sparge water while the Mash was in progress. 1 day, it occurred to me that I could use it to heat the Sparge water with out using the Propane. You just set temp to 170 & get along with business until Mash Out & Sparge. Beats trying to coordinating Mash timing with reaching Sparge temperature. Also means I don't have to lift Sparge tank @ 170 degrees to shoulder high.