Reddit reviews Fireplace draft stopper (large plug - fits most masonry fireplaces with dampers up to 38x16")
We found 5 Reddit comments about Fireplace draft stopper (large plug - fits most masonry fireplaces with dampers up to 38x16"). Here are the top ones, ranked by their Reddit score.
Blocks energy loss, odors, noise, insects, etc. from your chimney.
You can get inflatable dampers like this one to seal out the cold air. Obviously you need to make sure you get the appropriate size/shape for your fireplace. I haven't used it myself, but the reviews look promising.
https://smile.amazon.com/gp/product/B0001HA8MC/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Yep, I have a 1930 house in California that doesn't have a damper, so I bought a draft stopper balloon thing like this, it works well but takes some time to get into all the nooks and crannies - check YouTube for videos of people installing them. Your flue is probably cleaner than mine was, but prepare for some mess (it didn't help that my cat jumped up into the chimney on top of the firebox while my back was turned - he was dark grey for a while..).
Inflatable Draft Plug
Look at installing a chimney balloon or draft stopper:
https://www.amazon.com/Chimney-Balloon-Inflatable-Blocker-Pillow/dp/B000ILQN0W
https://www.amazon.com/Fireplace-draft-stopper-large-plug/dp/B0001HA8MC