140* sparge temp

[BlackJaqueJanaviac]

My domestic water heater is a tankless on-demand heater. It has a "shower" function in which I can temporarily set a different temperature than what it normally runs. After 60 minutes it returns to the previous temperature setting.

I played with it and I can set it as high as 140*. Would there be any reason this would be a bad idea to use for sparging?

 

[BryceL]

Ideally you want your sparge water up around 170. This helps with extracting as much of the sugars as possible without extracting tannins from the grain husks. I suppose 140 would work, you just might get a slightly lower efficiency. I don't think there would be any real negative impacts on your beer that I can think of.