An Environmental Control System includes a sensor, an air purification subsystem, and a controller in communication with the sensor and air purification subsystem. The sensor detects a contaminant in the air and generates a contaminant signal. The controller compares the contaminant signal to a predicted sensory response threshold. When the contaminant signal reaches the predicted sensory response threshold, the controller commands the air purification subsystem to alter a condition in the air.

An fluid monitoring system can include a filter having an upstream face and a downstream face and defining a form factor, a sensor package arranged within the form factor of the filter to detect at least one quality factor of a surrounding medium, a transmitter electronically coupled to the sensor package and including an antenna for autonomous wireless transmission of the detected fluid quality information, and a power subsystem coupled to the sensor package and the transmitter to provide access to continuous electrical power thereto.

Systems for coupling the operations of an environmental modifying unit and a smart appliance are described. In one form the system includes a central communication unit, a baby monitor, and a dispenser for modifying the environment in which the baby monitor exists. The central communication unit, the baby monitor, and the dispenser are wirelessly connected to one another.

An Environmental Control System includes a sensor, an air purification subsystem, and a controller in communication with the sensor and air purification subsystem. The sensor detects a contaminant in the air and generates a contaminant signal. The controller compares the contaminant signal to a predicted sensory response threshold. When the contaminant signal reaches the predicted sensory response threshold, the controller commands the air purification subsystem to alter a condition in the air.

An Environmental Control System includes a sensor, an air purification subsystem, and a controller in communication with the sensor and air purification subsystem. The sensor detects a contaminant in the air and generates a contaminant signal. The controller compares the contaminant signal to a predicted sensory response threshold. When the contaminant signal reaches the predicted sensory response threshold, the controller commands the air purification subsystem to alter a condition in the air.

A ventilation fan and light system is provided. The system includes: a controller; a sensor operatively connected to the controller; a fan switch operatively connected to the fan; a light operatively connected to the controller; a dimmer operatively connected to the light and the controller to operate the light at various levels of brightness; a light switch operatively connected to the controller and configured to selectively operate the light; and a first input device operatively connected to the controller to input to the controller a signal associated with any one of the following: a time of day and a detected level of ambient light.

A system for delivering a volatile composition into the air is provided. The system includes a central communication unit capable of receiving incoming signals and sending outgoing instructions. The central communication unit is communicably connected with a memory configured to store an algorithm. The system includes a smart appliance communicably connectable with the central communication unit and configured to send incoming signals to the central communication unit alerting the central communication unit of a status of the smart appliance. The system also includes a volatile composition dispenser that is communicably connectable with the central communication through a wireless communication link. The algorithm controls the volatile composition dispenser based on incoming signals sent from the smart appliance to the central communication unit.

A system for circulating a volatile composition throughout at least one room is provided. The system includes a central communication unit capable of receiving incoming signals and sending outgoing instructions. The central communication unit comprises a memory configured to store settings. The system includes a volatile composition dispenser capable of delivering the volatile composition into the air. The volatile composition dispenser is communicably connectable with the central communication unit through a wireless communication link. The system includes an air handling device communicably connectable with the central communication unit and configured to move air throughout the at least one room upon receipt of an outgoing instruction from the central communication unit.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for monitoring air quality with multiple sensing devices. The methods, systems, and apparatus include actions of: obtaining first sensor data from a sensor that is not an air quality sensor, determining that the first sensor data satisfy a first air quality criterion, in response to determining that the first sensor data satisfy the first air quality criterion, obtaining second sensor data from an air quality sensor, determining that the second sensor data satisfy a second air quality criterion, and based on a determination that the second sensor data satisfy the second air quality criterion, activating an air quality device.