I found this vent damaged on the side of my chimney (wood surround external to house, prefab). It's since been replaced with a metal vent. We have a standard fireplace with refractory panels. I was hoping it might be a fresh air intake location that could be used but not sure. We will be installing a Jotul F100 in front of our fireplace, SS Rockford liner already installed. Is it just venting for the wood surround? Thx!