The solar thermal system at Miller's Dairy near Creemore Ontario, provides domestic hot water for both the milk processing and bottling plant as well as in the dairy barn. Hot water in the plant is used for washing the returned glass bottles in the bottle washer as well as pipelines, pasteurization equipment, tanks, stainless steel milk lines and bottling equipment.

Excess hot water from the milk processing plant is sent to the dairy barn. Hot water in the dairy barn is used for washing the milk tank, pipeline, and milking units in the milking parlour. The hot water needed for the dairy barn alone accounts for about 1600 litres of hot water used per day on the farm.