Circulation heating

[hoseman1979]

I'm looking for feedback on possible problems with something I've tried over the last 2 brews. I wrapped my false bottom with polyester voile and used a chugger to recirculate. Between the pump and the top of the mash tun, the wort goes through a copper coil in a pot of boiling water. I've only used it on single stage mashes to take the wort to 170ish for mash out. It seems to work well and efficiently. Does anyone see a problem here? Is this going to cause something in the beer that I'm going to dislike?

 

[CRUNK]

Probably not because you still have to boil it afterwards that'll kill anything that's in it