When you recover the heat from the milk-cooling process, your operation becomes even more environmentally friendly and cost-effective. Wedholms heat-recovery system is called Interpac: it efficiently recovers the heat from the milk as it is cooled. About a litre of water can be heated to 40-45°C from each litre of milk cooled from 35 to 4°C. The heat can then be used to warm the drinking water for your cows. With a sufficiently large amount of milk, it can even cover the heating requirements of a standard house.