Regency I3100 on the way

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SterlingSL

Member
Nov 4, 2010
60
Dallas Tx
Just plunked down for the Regency I3100. I've been reading the thread about block-off-plates with interest. I asked the installer/dealer if they would install one - nope. They said they install some kind of seal near the top of the chimney. They did however say they would "stuff the damper area with insulation" if I wanted them too.

I was told my existing fireplace is a "heatform by Heatilator". Basically there is a damper, which is currently frozen shut, and you can see some heat capture tubes when you look up the chimney. The installer said they are going to have to cut 2-3 of those tubes out to get the flue in there and possibly some of the existing damper. My question: is stuffing the pre-existing damper area with insulation going to be sufficient or should I go ahead and do the block-off-plate. They have agreed to do the installation in two phases to allow me to get the block-off-plate made and installed (by me as I know of no one that will do that). I don't want to go to the trouble though if their solution of lining the area with insulation will be just as good.

Thoughts?
 
FWIW, when I installed an insert into an existing chimney, I used a block off plate. It kept the cold air that was present in the entire length of the chimney from drafting down into the house. I had some 1/8" steel sheared to size and trimmed the hole with a jig saw. Some Roxul insulation would be a plus.