Insulated my fireplace firebox and impact on PE Summit C insert

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.

donmac

Member
Jun 3, 2015
55
Cincinnati Ohio
I have had the Summit C insert for about 6 years now. I have a 17' insulated 6" flex liner (Olympia Armor flex) and insulated block off plate. This past off season I installed an Auber flue temp sensor and used left over chimney liner insulation(white with foil face) to line the three sides of the fireplace firebox.

I have two surface thermometers mounted above the stove door on the left and right corners to reflect stove body temp. These do not show much difference in temps as compared to running stove before insulating the fireplace firebox. The flue temp sensor never goes above 550-600 and after the stove body temp gets to about 450-500, the stove body temp and flue temp are about equal during the cruising burn phase.

The outside of the stove gets much hotter than it used to. I'm talking about the lower ash lip and metal covers below the lip that house the fan switch controls. The sliding air intake control lever gets very hot as well. I have also just noticed that I think a firebrick toward the front center is beginning to deteriorate/ crumble. I run my stove blowers on high during peak burn.

Bottom line I'm concerned my insulating the fireplace firebox is causing the stove body to get too hot. I'm concerned the increased heat will affect blower motors and wiring. Possibly the firebrick issue is a coincidence but I would appreciate input from other veteran insert users and others with the same kind of stove.
 

mellow

Resident Stove Connoisseur
Jan 19, 2008
5,287
Salisbury, MD
I found I could run my inserts at lower temps and achieve the same heat output after insulating my fireplace.

I ran an XTD 1.5 and a Jotul c450 for a couple winters with the insulated fireplace and saw no issues to the inserts. After that I only used catalytic inserts that could burn at lower temps. I did not have to run my inserts hard after insulating the fireplace, low-med would give me all the heat I needed for 1200 sq feet.
 

donmac

Member
Jun 3, 2015
55
Cincinnati Ohio
Mellow-thanks for your response, I too am finding the stove can put out more heat with smaller loads. Thanks for sharing helps reassure I have done no harm.
 

begreen

Mooderator
Staff member
Nov 18, 2005
90,660
South Puget Sound, WA
There is no real need for concern here. The Summit C's convection lid deflects the hot air downward toward the floor. The ash lip and side blower housings are non-combustible and the blower wiring is high-temp.