Help me to seal air/heat leak through fireplace
I recently rented a house with a fireplace that has no door enclosure. I noticed that a lot cold air is flowing down through the chimney and out from the fireplace. I took some photos and apparently there is a huge gap.
Is there any way I can close this gap to prevent heat loss? I've never lived in a place with a fireplace before so I don't know if there is a mechanism in place to close the gap. I see there is a single curving bar. I tried to tug at it but the bar wasn't budging. Perhaps it is fixed in place I'm not sure. I'm including some photos in hope someone knowledgeable with fireplaces could offer some advices. Thanks.