DuraFlex 6 Inch Diameter x 15 Foot Long Kit of 304-Alloy Light Chimney Liner

Yes, this liner is UL-1777 listed.

The first step may be to have a proper inspection of the chimneys performed, but if you are simply looking for the proper products to use in order to reline each chimney, we would need to know the total height of these chimneys, in addition to the interior flue measurements for each. For a proper reline, any damaged flue tile would be removed with a tile breaker prior to installing UL1777-listed corrugated stainless steel flexible liner or the proper diameter. Either poured or wrapped insulation should be used for each chimney liner for safety and to maintain warranty requirements for the liner itself. As a side note, the fireplaces and flues corresponding to the gas log sets you've had installed should have been inspected prior to installation. If these are vented gas log sets, the fireplaces need to be fully functional. When burning wood, a blocked or poor chimney system would result in visible smoke spillage. When a gas log set is installed, there is no visible smoke to detect a poorly performing chimney system. Instead, carbon monoxide will enter your home and this will be hard to detect without a carbon monoxide detector as it is invisible, colorless and odorless.

This can indeed be field ovalized to fit through your damper, and then rounded back out to connect to the top of the appliance.

Yes, this is a recommended kit for any woodburning insert that requires a 6" diameter all-fuel stainless steel chimney liner. For optimum performance, we recommend adding a 6" HomeSaver UltraPro Chimney Liner Insulation Kit.

If you are venting the wood burning stove into a properly built masonry chimney, the liner can be used in the chimney to transition from single wall stovepipe.