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and 70AF series
Common Questions: What boilers use the 560-528-989 orifice
and PGB series furnaces
there is no difference
Lennox 97H76 Damper Door Spring and 70AF seriesThe Lennox 97H76 Damper Door Spring is a critical mechanical component designed to provide precise tension and return force for damper assembly operations within commercial and residential HVAC systems. Functioning as the primary HVAC damper actuator spring, this part ensures that air mixing dampers and economizer doors return to their default positions upon system cycling or power loss. Engineered for durability in high cycle environments, the 97H76
