Rigid Duraliner assembly

[Incognito]

Hello,

I'm getting ready to install a Regency i3000 wood burning insert and have a couple of questions on the install and materials. The interior fireplace is a brick facade and hearth. The chimney is on an exterior wall constructed of 4x8x16" hollow cement block. It has a 11.5x15.5" clay liner. The firebox is a double wall steel Heatform system from 1975. There are no combustable materials near this entire assembly.

1. Can I cut through the first layer of the Heatform to create the necessary clearances for the back of the insert and the flue going through the steel damper system? The damper and smoke shelf is about 10% rusted out.

2. I used a plumb bob and the clayliner is straight with no mortar joints in the way of a liner. The inside dimension of the clay is about 9.5x13.5. I would like to use Duravent double wall rigid pipe(6.625 outside diameter) that is insulated. I need about a 4.5" offset from the stove flange to the center of the clay liner. How do I attach their heavy duty 36" flex pipe(part number 6DLR-36HF) to the flange of the insert? I don't see any type of an adapter that will work with insert. The insert has a 6" inside diameter round flange sticking up about 2 inches.

Thanks!
Steve

 

[begreen]

Welcome Steve. Yes, you can open up the top of the old heatform.
Duraliner makes a round appliance connector that mates with the flex pipe. These come in 15, 30, & 45º angles depending on what makes the cleanest install. They also make a flat stove connector for inserts with just a hole on top. I haven't tried this, but I am wondering if the end fo the 36" flex will fit snugly without any adapter. It may be possible. That would take a call to Duravent support to verify or just try it first. I have the OD, but not the ID of that end.