Gas Fireplace Lever?

[Jerry Simon 18]

What is this lever for on the left side of this gas-log fireplace?  I don't think it's a damper control, but maybe an intake-air control???

[BADAIR 4]

yes Jerry

damper control lever for combustion/draft fresh air

should have been a damper-less screened vent at or above on the adjacent exterior wall

 

Edited March 2 by BADAIR

[Erby 19]

They're usually marked for open and closed positions, at least around here.