I have a Heat n Glo Northstar that was installed during new construction a couple of months ago. We just got into the house a couple of weeks ago, and I have not used the fireplace yet. We had our first chilly night, and I felt alot of cold air leaking into the room from the faceplate underneath the doors. When I open the doors, the firebox is filled with cold air, and I can hear a ticking noise, but cannot determine where the noise is coming from. Two questions - Is there anything that can be done to prevent that cold air, and does anyone know what the ticking noise might be? Thanks.