secondary air definition
secondary air means the air introduced into the exhaust system by means of a pump or aspirator valve or other means that is intended to aid in the oxidation of HC and CO contained in the exhaust gas stream;
secondary air means air which is introduced to the furnace as compared to primary air which is introduced with the fuel at the burner.
secondary air refers to air introduced into the exhaust system by means of a pump or aspirator valve or other means that is intended to aid in the oxidation of HC and CO contained in the exhaust gas stream.