I've got a summit insert that seems to burn much quicker in the front half than back half. Getting a lot of coal collection in back. Did not used to do this. Is this do to a flue cleaning issue or is there something else to assist in a complete burn or more air in back? Also anyone using a grate to get air to the back?
![[Hearth.com] Pacific Energy Summit Insert - Less burning in back than in front. [Hearth.com] Pacific Energy Summit Insert - Less burning in back than in front.](https://www.hearth.com/talk/data/attachments/308/308270-c19b5962e145573994eedbd217d3e2f2.jpg?hash=9SVi3P2ppy)
![[Hearth.com] Pacific Energy Summit Insert - Less burning in back than in front. [Hearth.com] Pacific Energy Summit Insert - Less burning in back than in front.](https://www.hearth.com/talk/data/attachments/308/308270-c19b5962e145573994eedbd217d3e2f2.jpg?hash=9SVi3P2ppy)