I have a gas burning fireplace built in about 1978. It can be wood burning or gas, (masonry construction) but it was fitted with gas logs and looks to have never been used for wood. It is a "see through" fireplace, open on front and back. We would like to put an insert in that is direct vent, but the handful of local (Chicago area) companies we have contacted indicate that there are no "see through" inserts. (Or that you cannot retrofit a fireplace with a see through insert without opening up the chimney, etc)
We would like the fireplace to be more efficient, but more importantly, we would like to use outside air for combustion. Is an insert the only way to do this? Are we stuck with what we have? help!