Abstract: An indoor air quality system is configured to improve indoor air quality conditions within a local environment of a building. The indoor air quality system operates according to a method that includes obtaining indoor air quality levels and operating one or more appliances to adjust the indoor air quality levels.

Abstract: A ventilation fan is disclosed having a housing with at least one sidewall defining an interior space, an inlet opening into the interior space, and an outlet aperture spaced apart from the inlet. The housing has at least one of a prong and a recess with at least one nail extending away from the at least one of a prong and a recess toward an aperture in the housing. The at least one of a prong and a recess is configured to be deformable to allow the at least one nail to pass through the aperture in the housing.

Abstract: A ventilation system having a main housing configured to be positioned adjacent to a wall or ceiling of a room of a building structure, a blower configured to be positioned in the main housing and draw air out of the room of the building structure, and a grille configured to be releasably secured to one of the main housing and the blower to at least partially block view of the blower. The grille has a plate defining an inner side and an opposing outer side and a plurality of legs configured to be removably securable to the plate.

Abstract: A ventilation system having a main housing configured to be positioned adjacent to a room of a building structure, a blower configured to be positioned in the main housing and draw air out of the room of the building structure, and a grille configured to be releasably secured to one of the main housing and the blower to at least partially block view of the blower. The grille has a plate defining an inner side and an opposing outer side and a plurality of legs extending from the plate and angled outwardly at an angle to the plate. The angle of the legs facilitates nested stacking of the grille with a second grille configured identically to the grille.

Abstract: A ventilation fan is disclosed having a fan housing defining an interior space, an inlet and an outlet. A fan wheel is configured to be located in the interior space and the fan wheel has a hub and a fan blade extending from the hub to a fan blade distal end. A plate is configured to be located between the fan wheel and the fan housing inlet. The plate has a sump defining a plate inlet and a plate peripheral portion. The sump is configured to extend away from the plate peripheral portion toward the fan housing inlet such that the plate inlet is spaced from the plate peripheral portion to define a gap and the flan blade distal end is configured to be located in the gap.

Abstract: An indoor air quality system is configured to improve indoor air quality conditions within a local environment of a building. The indoor air quality system operates according to a method that includes obtaining indoor air levels and operating one or more appliances to adjust the indoor air levels. The system includes one or more monitoring devices.

Abstract: An indoor air quality system is configured to improve indoor air quality conditions within a local environment of a building. The indoor air quality system operates according to a method that includes obtaining indoor air levels and operating one or more appliances to adjust the indoor air levels. The system includes one or more monitoring devices.

Abstract: An item tracking system includes a plurality of items for storage and removal from a compartment. The system includes tags affixed to the items and configured to store identifiers for the items. A tag reader receives data from the tags in response to the items being removed from and returned to the compartment. A sensor in the compartment identifies a state change associated with the compartment. A processor identifies removal of an item with data received by the tag reader, identifies the state change with the sensor after the item is removed and before it is returned, and generates an output with an output device including the identifier corresponding to the item in response to the state change in the compartment.

Abstract: A method tracks usage of items stored in containers. To perform the method, a sensor in a mobile electronic device receives data identifying a type of item stored in a container and a number of the type of item present in the container from a tag associated with the container. A user interface in the mobile electronic device generates a prompt requesting entry of a count of the items removed from the container. The sensor in the mobile electronic device generates a revised number of the items stored in the container and stores the revised number in the tag.

Abstract: An item tracking system includes a plurality of items for storage and removal from a compartment. The system includes tags affixed to the items and configured to store identifiers for the items. A tag reader receives data from the tags in response to the items being removed from and returned to the compartment. A sensor in the compartment identifies a state change associated with the compartment. A processor identifies removal of an item with data received by the tag reader, identifies the state change with the sensor after the item is removed and before it is returned, and generates an output with an output device including the identifier corresponding to the item in response to the state change in the compartment.

Abstract: An item tracking system includes a plurality of items for storage and removal from a compartment. The system includes tags affixed to the items and configured to store identifiers for the items. A tag reader receives data from the tags in response to the items being removed from and returned to the compartment. A sensor in the compartment identifies a state change associated with the compartment. A processor identifies removal of an item with data received by the tag reader, identifies the state change with the sensor after the item is removed and before it is returned, and generates an output with an output device including the identifier corresponding to the item in response to the state change in the compartment.

Abstract: A method tracks usage of items stored in containers. To perform the method, a sensor in a mobile electronic device receives data identifying a type of item stored in a container and a number of the type of item present in the container from a tag associated with the container. A user interface in the mobile electronic device generates a prompt requesting entry of a count of the items removed from the container. The sensor in the mobile electronic device generates a revised number of the items stored in the container and stores the revised number in the tag.

Abstract: An item tracking system includes a plurality of items for storage and removal from a compartment. The system includes tags affixed to the items and configured to store identifiers for the items. A tag reader receives data from the tags in response to the items being removed from and returned to the compartment. A sensor in the compartment identifies a state change associated with the compartment. A processor identifies removal of an item with data received by the tag reader, identifies the state change with the sensor after the item is removed and before it is returned, and generates an output with an output device including the identifier corresponding to the item in response to the state change in the compartment.

Abstract: A system for ordering items includes a plurality of tagged containers, an item being stored in each container. A mobile electronic device reads data in a tag associated with one of the containers and identifies at least one supplier for the item that is within a predetermined distance of the mobile electronic device. The mobile electronic device sends an order request to a server that identifies the at least one type of item in the container and the at least one supplier. The server generates an order for the item with only the one supplier identified in the order request and sends the order to another server operated by the one supplier.