I am looking for some advice with respect to fire place dampers. Here is the issue: We have been restoring an 1890s Victorian. We have two fireplaces that were coal burners and had the cast metal coal boxes in them. We recently changed those out and installed to Valor gas burning fireplace inserts that look like coal burning inserts. However, to my surprise, they do not come with a damper system (these are open fireplace inserts).

I started to look at various top mounting damper systems such as "Locktop", etc. However, it seems that for all of these systems, one must install the releasing cable within the fireplace box itself. With these inserts, that cannot be done...and thus the rub.

Is anyone aware of alternative damper systems that could be used in which the release mechanism can be attached to the outside of the chiminey within the room rather than within the firebox itself?