Abstract: Adjustable venturi assemblies and methods of using adjustable venturi assemblies are disclosed. In one aspect, a venturi assembly for injecting a secondary fluid into a primary fluid flow path is provided. The venturi assembly comprises a nozzle, a constricted section in fluid communication with the nozzle, a secondary fluid conduit in fluid communication with the nozzle, and a flow adjusting device. The nozzle and constricted section together define the primary fluid flow path along a first axis. The secondary fluid conduit is for transporting secondary fluid from the secondary fluid reservoir to the constricted section along a second axis. The flow adjusting device is positioned opposite the secondary fluid conduit and is configured to alter a velocity of fluid flowing along the primary fluid flow path by extending into a portion of the constricted section along the second axis.

Abstract: Adjustable venturi assemblies and methods of using adjustable venturi assemblies are disclosed. In one aspect, a venturi assembly for injecting a secondary fluid into a primary fluid flow path is provided. The venturi assembly comprises a nozzle, a constricted section in fluid communication with the nozzle, a secondary fluid conduit in fluid communication with the nozzle, and a flow adjusting device. The nozzle and constricted section together define the primary fluid flow path along a first axis. The secondary fluid conduit is for transporting secondary fluid from the secondary fluid reservoir to the constricted section along a second axis. The flow adjusting device is positioned opposite the secondary fluid conduit and is configured to alter a velocity of fluid flowing along the primary fluid flow path by extending into a portion of the constricted section along the second axis.

Abstract: Methods and systems for disinfecting conduits using gaseous ozone are disclosed. The systems and methods include an ozone generation apparatus capable of producing gaseous ozone to be introduced into conduits. The gaseous ozone can then disinfect the conduit. Some embodiments of the systems and methods further comprise an ozone destruction apparatus capable of destroying the ozone after a certain stage of the disinfection process is reached.

Abstract: An intelligent gas flow sensor probe which outputs a state signal indicating whether there is forced gas flow present within a conduit or whether there is no gas flow. The intelligent gas flow sensor probe includes a heated thermistor and a reference thermistor functionally coupled to a microcontroller. The heated thermistor is continuously heated at a constant rate to a temperature above an ambient temperature within the conduit and outputs a signal responsive to a change in temperature induced by gas flow incident thereupon. Gas flow within the conduit causes heat to be transferred from the heated thermistor to the gas flowing over and/or around the heated thermistor. The reference thermistor is thermally insulated from the heated thermistor and outputs a reference signal responsive to an ambient temperature of the gas within the conduit.

Abstract: An intelligent gas flow sensor probe which outputs a state signal indicating whether there is forced gas flow present within a conduit or whether there is no gas flow. The intelligent gas flow sensor probe includes a heated thermistor and a reference thermistor functionally coupled to a microcontroller. The heated thermistor is continuously heated at a constant rate to a temperature above an ambient temperature within the conduit and outputs a signal responsive to a change in temperature induced by gas flow incident thereupon. Gas flow within the conduit causes heat to be transferred from the heated thermistor to the gas flowing over and/or around the heated thermistor. The reference thermistor is thermally insulated from the heated thermistor and outputs a reference signal responsive to an ambient temperature of the gas within the conduit.

Abstract: An electronic control circuit for intelligently controlling a gas discharge lamp associated with an HVAC system. The circuit includes a microcontroller having a memory containing instructions executable by the microcontroller to process a plurality of dynamic lamp state signals and dynamically generate control signals in at least partial dependence on a plurality of pre-established control parameters to maintain the gas discharge lamp in a minimum operable state defined by the pre-established control parameters. The gas discharge lamp is coupled to an electronic ballast circuit configured to dynamically control a current flow through the gas discharge lamp in dependence on the dynamically generated control signals sent by the microcontroller. The executable instructions cause the microcontroller to iteratively determine the minimum operable state of the gas discharge tube in at least partial dependence on a voltage excursion included as one of the plurality of dynamic lamp state signals.

Abstract: An electronic control circuit for intelligently controlling a gas discharge lamp associated with an HVAC system. The circuit includes a microcontroller having a memory containing instructions executable by the microcontroller to process a plurality of dynamic lamp state signals and dynamically generate control signals in at least partial dependence on a plurality of pre-established control parameters to maintain the gas discharge lamp in a minimum operable state defined by the pre-established control parameters. The gas discharge lamp is coupled to an electronic ballast circuit configured to dynamically control a current flow through the gas discharge lamp in dependence on the dynamically generated control signals sent by the microcontroller. The executable instructions cause the microcontroller to iteratively determine the minimum operable state of the gas discharge tube in at least partial dependence on a voltage excursion included as one of the plurality of dynamic lamp state signals.