Energy efficient air quality maintenance system and method

Details Energy efficient air quality maintenance system and method Energy efficient air quality maintenance system and method

1997-06-27

1999-11-02

Joyce, Harold

Ventilation

Having forced recirculation

Including automatic control means

454236, F24F 1300

Patent

active

059760109

ABSTRACT:
A heating, ventilation, and air conditioning (HVAC) system uses unvitiated secondary return air to control the amount of a contaminant, such as carbon dioxide, in a space to maintain an improved air quality throughout the area served by the system. Preferably a terminal box controls the CO.sub.2 level in the space served by the box by selectively drawing air representative of air in other rooms to lower the CO.sub.2 level in the space being served. This reduces cost because air which is provided from other rooms within the building will require less total system heating or cooling in order to maintain the occupied space at the desired air quality.

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