Abstract: A room air purifier including upper and lower portions. The upper and lower portions may include integrated resilient upper and lower gaskets configured so that with an air filter removably installed in the room air purifier and with the upper and lower portions attached to each other, the upper and lower portions apply pressure to the air filter through the upper and lower gaskets.

Abstract: The present disclosure provides systems and methods for collecting distributed information regarding air quality and air management system performance, and providing recommendations for affecting the air quality, the air management system, or individuals subject to or in control of either the air quality or the air management system.

Abstract: Systems and methods for monitoring the condition of an air filter installed in an HVAC system and for monitoring the condition of the HVAC system. The monitoring system includes a processing unit configured to receive data representative of at least a first temporal parameter of the HVAC system. The processing unit can process the data to obtain an indication of the condition of the air filter and can also process the data to obtain an indication of the condition of the HVAC system.

Abstract: A method of monitoring the condition of an air filter installed in an HVAC system of a building unit. The method involves two-way wireless communication between a sensing unit that is mounted within the HVAC system and a geofencing-enabled app that is resident on a mobile device. Wireless signals between the sensing unit and the mobile device pass through an interior passage of ducting of the HVAC system with the interior passage of the ducting acting as a waveguide. The geofencing-enabled app is configured so that the app is triggered to open communication with the sensing unit upon the mobile device entering a geofencing boundary that is at least generally coincident with lateral boundaries of the building unit.

Abstract: A frame assembly for releasably maintaining an air filter. In some embodiments, the frame assembly includes a thermoformed body integrally forming a base, opposing side walls, opposing end walls, and at least one closure sub-assembly. The frame assembly is configured to releasable retain an air filter relative to the base via the closure sub-assembly. In other embodiments, the frame assembly defines, in a flat state, foldable side and end panels at the perimeter edges of a central grid panel; the frame assembly can be transitioned to a final state for receiving an air filter by folding the panels. The frame assemblies of the present disclosure are re-usable, allowing a user to replace a “used” air filter with a “new” air filter.

Abstract: A fragrance dispenser for emitting fragrance into an airstream impinging on an air filter, the dispenser having a receptacle with an open end that faces toward the air filter and that has a porous diffuser layer occlusively overlying the open end of the receptacle.

Abstract: Devices, systems and methods for obtaining data associated with air filter media of an air filter, and for using such data to generate an air filter recommendation, such as an indication of the air filter media condition to a user, an indication that the filter needs replacing, and/or a recommendation to use a different type of filter.

Abstract: A hearing protection apparatus is provided. The apparatus comprises a removable compressible pad having a top portion and a bottom portion wherein the compressible pad is configured to be secured to the headband when the apparatus is worn. The compressible pad can provide increased comfort and an improved fit to the user.

Abstract: The present disclosure generally relates to air filters expandable from a collapsed arrangement to an expanded, end-use arrangement and to methods of making, using, and installing such air filters. Some embodiments relate to an air filter having an expanded state and a collapsed state. The air filter includes a filter media assembly including (1) filter media including a plurality of pleats, (2) first and second opposing sides, and (3) first and second opposing ends. The air filter also includes a shape retention structure capable of being connected to at least a portion of the filter media assembly and capable of retention the filter media assembly in the expanded state. A spacing distance between adjacent pleats in the filter media is greater in the expanded state of the air filter than in the collapsed state of the air filter. In some embodiments, the air filter is an HVAC air filter.

Abstract: A frame assembly for releasably maintaining an air filter. In some embodiments, the frame assembly includes a thermoformed body integrally forming a base, opposing side walls, opposing end walls, and at least one closure sub-assembly. The frame assembly is configured to releasable retain an air filter relative to the base via the closure sub-assembly. In other embodiments, the frame assembly defines, in a flat state, foldable side and end panels at the perimeter edges of a central grid panel; the frame assembly can be transitioned to a final state for receiving an air filter by folding the panels. The frame assemblies of the present disclosure are re-usable, allowing a user to replace a “used” air filter with a “new” air filter.