Fireplace Circulation Vents Pics Wanted

[Barrie WETT Inspector]

I am trying to find some pictures that accurately show the size and location of masonry fireplace circulation vents. Appreciate any pictures you would like to share. I tried Google but had no luck. You can post here or email them to [email protected]

Thanks for your help

 

[EatenByLimestone]

I don’t think I’ve ever heard of masonry fireplaces having circulation vents. Just Heatilator type units. It’d take a lot of time for the masonry to heat up enough for a good convection current to get going. Maybe masonry heaters would have something like that?