Coldness and heat belong together DK Kälteanlagen has been developing and producing the DK heat recovery system for 40 years now. As a result we experience harmony between coldness and heat. The process of cooling produces waste heat, which is used by the DK heat recovery system for water warming. In Fact: Hot water for free ! Applications of our system are not only in supermarkets, bakeries, butchers & slaughterer but also restaurants, catering and for milk cooling. We are proud about 600 delivered heat recovery systems (status January 2019) for transcritical CO2 units since 2008. Another tailor-made solution additional to the heat recovery system is the DK cold water chiller for specific temperatures and fluids which we have been producing since 1991 as well. Have we made you curious enough to contact us? We are keen on finding together with you the optimal individual solution for your cooling unit.