I have a Regency wood burning fireplace insert that pours cold air in the house. It is connected to a flex steel pipe to the top of the chimney.

I had a fireplace guy shove bunches of insulation up around the chimney above the stove and it worked okay.

However, I still have cold air coming in at the base through the holes in the removable blower unit.

Is there anyway I can stop the leaks completely?

The manufacturer can't fix the problem and my next step is to trash the stove.