Regency insert insulation question

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matlocc

Member
Jan 22, 2015
28
michigan
I have an older regency insert that I fit into an existing fireplace. I ran a SS pipe up the existing chimney. I then put a surround in front to cover the opening. It has been working well.
I am now wondering if I should place some rockwool on the top of the stove behind the surround to hold some of the heat in the stove and not send it up the chimney.
Any thoughts on this?
 

stoveliker

Minister of Fire
Nov 17, 2019
4,537
Long Island NY
Yes. In fact, search for "block off plate" on this forum - i.e. a metal plate closing the hole. Preferably with rockwool on top.


Did you have the existing chimney cleaned (thoroughly) before you ran the liner?

This is a useful page :
 

EbS-P

Minister of Fire
Jan 19, 2019
2,664
SE North Carolina
Is the chimney interior or exterior? I’d probably insulate if it’s an exterior chimney. Blockoff plate saves lots of heat either way.

Evan
 
Last edited:

matlocc

Member
Jan 22, 2015
28
michigan
Interior, I do not have a block off plate. I thought insulation on top of the firebox on the outside would give more heat from the fans. I don't have draft problems.
 

kingquad

Minister of Fire
Nov 17, 2010
681
Pennsylvania
Install a block off plate. Put roxul above it. It makes a huge difference. You don't lose any heat up the chimney. I'd also pull the cap on the top of the chimney and pack roxul around your chimney liner. Like the earlier mention, search for block off plate on the forum. It's worth your time. If you click on my name, you should be able to access my old posts. I have an old install thread with pics of how I did mine.
 

begreen

Mooderator
Staff member
Nov 18, 2005
93,764
South Puget Sound, WA
It's not recommended to insulate on top of an insert due to concerns of overheating. A block-off plate is a safer bet.
 
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kingquad

Minister of Fire
Nov 17, 2010
681
Pennsylvania