Abstract: There is disclosed a fluid flow switch assembly comprised of a conduit member having an area of predetermined cross-section and a port portion and further including a plate member mounted for rotation in the conduit member and disposed over the area of predetermined cross-section whereby rotation of the plate member during fluid flow closes an electrical circuit in a switch assembly disposed in the port portion of the conduit member.

Abstract: There is disclosed an energy consumption indicating system for a multi-occupancy dwelling including a plurality of units each having a space heat exchanger and a thermostat and wherein said multi-occupancy dwelling is provided with a main heat exchanger having an outlet conduit, an inlet conduit and at least one circulating pump and wherein a conduit member is provided for each unit in fluid communication to the main heat exchanger and the space heat exchanger in each unit and wherein fluid flow through each conduit member is effected in response to a thermostat in each unit and wherein a time meter for each unit is energized to measure time duration of fluid flow through the conduit member.