Newbie question......What is....

[Jjm457]

a block off plate, why and when is it needed?

 

[dougand3]

Usually, it's a sheet metal rectangle with hi temp insulation. It's placed near the fireplace damper. It blocks heat from going up the masonry chimney. It may have a 6" or 8" hole that the liner comes thru to connect to stove/insert. Or may be in 2 parts that fit around the the liner. You want the insert or stove heat entering the room and not up the chimney.

 

[Brookwood]

That's a question we've all asked. I tend to bookmark the links for tips and projects that I want to do later. Here is a good one for the blockoff plate as it was installed by OhioBurner. Also, searching the forum articles will give great amounts of info.

https://www.hearth.com/econtent/index.php/forums/viewthread/67219/

 

[begreen]

Here's an article about damper-sealing block-off plates:

https://www.hearth.com/econtent/index.php/wiki/Why_damper_seal_is_needed/