Engineering, 28.11.2021 08:30 stefaniethibodeaux

A fresh air louver mounted on an exterior wall and equipped with a damper to allow to allow the required fresh air into the boiler room A should be closed
B remain open at all times
C should be open when the boiler off
D should open and close automatically

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A fresh air louver mounted on an exterior wall and equipped with a damper to allow to allow the requ...

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