I just spoke with Bob at:
INFINITY FLUIDS CORPORATION
346 FRANKLIN STREET
PO BOX 992
WORCESTER, MA 01604
SALES@INFINITYFLUIDS.COMTOLL FREE 888-565-8137
SALES DIRECT 508-864-3708
There is something for everyone that needs hot water or steam with these very helpful guys. He suggested a recirculating point of use water heater for my 300 liter cheese vat. Like everyone else here, I am looking for an easy solution to keeping this much milk/whey at the right temp and will be getting more info and solutions from Bob. In my case, I have a water jacket that holds 350 liters of water and keeping it warm, and ramping temps up, is a daily headache.