Morning all, Can someone please point me towards an article or thread that discusses the most efficient use of an immersion chiller? I've got a small pump that I use at the moment and generally recirculate water from my sink through the coil and back to the sink. If I were pouring water straight down the drain after the cooler then I'd drop the flow rate down, but I'm guessing the best way to run a recirculating pump cooler is with the pump flat out and change the water in the sink periodically? I'm beginning to to think this would be no less wasteful on water than straight down the drain with the flow adjusted so that the output temp is the same as the point where I would change the water! Using the sink does however give the benefit of being able to dump a load of ice in there without contamination issues and get the input temperature down to 1-3 degrees.