Abstract: This disclosure relates generally to air handling systems for buildings, more particularly to energy recovery ventilation systems, and specifically to a calculation/estimation of effectiveness which may be used for informational and maintenance purposes.

Abstract: This disclosure relates generally to air handling systems for buildings, more particularly to energy recovery ventilation systems, and specifically to a calculation/estimation of effectiveness which may be used for informational and maintenance purposes.

Abstract: A control system, comprising one or more smoke sensors, each configured to measure a level of smoke at a location within a building and to output a smoke level signal based at least in part upon the measured level of smoke. A controller configured to receive the smoke level signals and to control an operation of one or more energy recovery ventilation systems in a first mode of operation to recover energy when the smoke level signal is below a predetermined value and in a second mode of operation to evacuate smoke when the smoke level signal is above the predetermined value.

Abstract: This disclosure relates generally to air handling systems for buildings, more particularly to energy recovery ventilation systems, and specifically to a calculation/estimation of effectiveness which may be used for informational and maintenance purposes.

Abstract: A control system comprising a temperature sensor, an enthalpy sensor and a processor capable of receiving said temperature and enthalpy signals and further capable of controlling the operation of an energy recovery ventilation wheel based at least in part on said temperature and enthalpy signals.

Abstract: The present combined multi-modal apparatus involves: (a) apparatus for cooling, by means of a refrigerant circulating within coils disposed in a tank a negative heat energy storage material during a first time period; (b) associated apparatus for utilizing that stored negative heat energy during a second time period; and (c) most particularly, a tank by-pass structure for directly connecting a condensing unit and an evaporating unit during a third time period, such as for example when supplemental cooling is required. Specifically, the tank by-pass structure avoids circulation during the third time period of the refrigerant within the conduits or coils disposed within the negative heat energy storage material contained within the tank.