The trend of last years of increasing utility costs will continue. Payment of utility services increases every year and any supermarket can't work without it. We can affect on this situation using «internal reserves» of the supermarket: warmth producing during the work of refrigeration equipment goes on water and store heating.
Heat recovery system has been developed to save energy carriers (like natural gas etc.) normally used to supply outlet with hot water. Energy saving is reached due to a possibility does not replace usual water heating devices, but supplement them and lets significantly reduce running costs. Operational characteristics of the system depends both from season changes of water and air temperatures and water withdrawal by the user.