Abstract: An air quality sensor system is disclosed comprising a housing defining a sidewall means. An air input is located on a first sidewall of the sidewall means with an air output located on a second sidewall of the sidewall means angularly disposed relative to the first sidewall of the sidewall means. A particle sensor including a fan is located within the housing and interposed between the air input and the output for sensing the number of particles passing between the air input and the air output. Preferably, a temperature and humidity sensor, a volatile organic compound (VOC) sensor and a carbon dioxide (CO2) sensor are provided for sensing the ambient air. A transmitter may be included for transmitting data from the particle sensor.

Abstract: An input plenum is disclosed for mounting to an air conditioning/heating unit. The input plenum comprises an air filter track for introducing and removing the air filter. A grid array track is located within the input plenum. The grid array track enables a grid array and an electronic generator to be added to the plenum to upgrade the plenum into an air purification system. An improved one-piece grid may be incorporated into the grid array for generating an electric field in the air purification system.

Abstract: An improved ceiling mounted air treatment system is disclosed for installation upon a ceiling grid system having a plurality of ceiling panels within a room. The improved ceiling mounted air treatment system comprises a ceiling plenum defining a plurality of side walls, a top wall and a bottom wall. The plurality of side walls are dimensioned for replacing a ceiling panel of the ceiling grid system. An air input and an air output are defined in the bottom wall. A grid array is disposed within the plenum and located between the air input and the air output. An electronic generator is connected to the grid array for treating the flow of air through the grid array. A fan is interposed between the air input and the air output for establishing the flow of air from the room into the air input to exit from the air output into the room.