Abstract: A humidifier device includes one or more sensors configured to sense one or more air properties of air within a duct operably coupled to the humidifier device. The humidifier also includes control circuitry configured to receive an indication of the one or more air properties of the air, determine a water absorption capability of the air based at least in part on the one or more air properties of the air, and determine an amount of moisture to be outputted by the humidifier device to the duct based at least in part on the water absorption capability of the air. The humidifier also includes an atomizer configured to output the determined amount of moisture to the duct.

Abstract: A motion detector having a bandpass filter is described herein. One device includes a passive infrared (PIR) sensor configured to generate a signal, and a bandpass filter configured to filter the signal, wherein the bandpass filter comprises a plurality of high pass filters, a plurality of low pass filters, and two operational amplifiers, wherein a portion of the plurality of high pass filters include a capacitor and two resistors.

Abstract: A motion detector having a bandpass filter is described herein. One device includes a passive infrared (PIR) sensor configured to generate a signal, and a bandpass filter configured to filter the signal, wherein the bandpass filter comprises a plurality of high pass filters, a plurality of low pass filters, and two operational amplifiers, wherein a portion of the plurality of high pass filters include a capacitor and two resistors.

Abstract: Sensor offsets for an air filter monitor installed in an HVAC system may be determined by measuring a sensor offset differential pressure value across an air filter when substantially no air flow exists through the air filter. The sensor offset differential pressure value obtained at or near zero flow may represent the sensor offset for the air filter monitor. The sensor offset differential pressure value may be used to compensate an un-compensated differential pressure value obtained during flow conditions.

Abstract: Sensor offsets for an air filter monitor installed in an HVAC system may be determined by measuring a sensor offset differential pressure value across an air filter when substantially no air flow exists through the air filter. The sensor offset differential pressure value obtained at or near zero flow may represent the sensor offset for the air filter monitor. The sensor offset differential pressure value may be used to compensate an un-compensated differential pressure value obtained during flow conditions.

Abstract: An electrical terminal assembly for an HVAC device is disclosed. In one illustrative embodiment, the terminal assembly includes one or more quick-connect or screwless type terminal blocks mounted on a printed circuit board. The terminal assembly may also include one or more test pads electrically connected to the one or more quick-connect or screwless terminals via one or more traces on the printed circuit board. The one or more test pads may include a recessed portion.

Abstract: An electrical terminal assembly for an HVAC device is disclosed. In one illustrative embodiment, the terminal assembly includes one or more quick-connect or screwless type terminal blocks mounted on a printed circuit board. The terminal assembly may also include one or more test pads electrically connected to the one or more quick-connect or screwless terminals via one or more traces on the printed circuit board. The one or more test pads may include a recessed portion.