insulation - How can I insulate my fireplace when it's not in use

I have a wood burning fireplace insert, that is not currently being used. Now that it's cold in my area (27F), I've noticed that there is quite a draft coming from the fireplace. How can I cover/

How To Insulate A Fireplace

How to Soundproof a Fireplace and Chimney

repair - Insulation exposed behind face of my fireplace - Home Improvement Stack Exchange

bathroom - How would insulate/fill this large enclosed area behind my gas fireplace - Home Improvement Stack Exchange

Walls Behind Fireplaces Building America Solution Center

Is It Safe to Put Insulation Behind a Gas Fireplace?

How To Insulate Chimney

How Home Insulation Helps Reduce Your Energy Bill - This Old House

Fireplace Plug 16 in. x 38 in. Rectangular Fireplace Plug Rectangular Fireplace Plug BRK-FP-05-01 - The Home Depot

Choice of insulation behind electric fireplace

How to insulate an old fireplace opening - Quora

How Long Does Insulation Last

insulation - How can I insulate my fireplace when it's not in use? - Home Improvement Stack Exchange

The Ways Solid Insulation Works to Your Home's Advantage - Make it Mowery