Abstract: An installation for heat recovery from warm household drain water produced at household water consumption points, comprising a distributor tank, a first pipeline system which delivers warm household drain water from the consumption points to the distributor tank, a drain water channel, a heat exchange tank, and a second pipeline system which conveys warm household drain water to the heat exchange tank. The distributor tank has a first outlet leading into the drain water channel with a shut-off device which opens when the household drain water is below a predetermined temperature, and a second outlet into the second pipeline system when the household drain water in the distributor tank is above the predetermined temperature. Within the heat exchange tank is a coil containing cold drinking water which is heated by the household drain water.

Abstract: The apparatus serves for rapid recording and processing of orders in gastronomic and similar establishments with input devices at the table for data pertaining to the orders and with a central accepting location for the data pertaining to orders, and should replace heretofore proposed complex table keyboard apparatus whose operation is quite time consuming.This is accomplished by menus one of which is available at each table and whereon the information pertaining to foods and beverages is associated with bar code patterns, by a reading pencil which is to be actuated by the guest for optical detection of the bar code patterns, and by a check printer which is located at the central accepting location whereby the reading pencil lights up in green color if the order can be fulfilled and lights up intermittently in red when the order cannot be fulfilled.