DuraVent DirectVent Pro Direct Vent Factory Built Reline Kit: two liners for an existing metal chimney
The DuraVent DirectVent Pro Direct Vent Factory Built Reline Kit is a liner kit for a direct vent gas insert in an existing factory built metal chimney. It is for a metal chimney, not a brick one. You get a high wind cap, two 35 foot flexible aluminum liners, and four hose clamps. This arrangement is called co-linear: separate liners run side by side and meet at one cap. Red marks the exhaust liner, and green marks the incoming air liner. The old chimney needs at least 7 inches inside. It must be inspected and cleaned first, then serves only as a passage for the liners.
Choose a 3 inch or 4 inch exhaust liner to match your insert. The insert connectors are sold separately. DirectVent Pro is DuraVent’s pipe inside a pipe vent for direct vent gas fireplaces and stoves: exhaust goes out through the inner pipe and outside air comes in through the outer pipe. Approval is for the vent together with the insert, not the vent alone. Working with brick? See the DuraVent DirectVent Pro Co-Linear Kit with Flex for masonry chimneys. The DuraVent DirectVent Pro Direct Vent Factory Built Reline Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 46DVA-CL33KFB | 46DVA-CL34KFB
Applications
DirectVent® Pro is a unitized, coaxial (concentric) venting system designed for use with direct vent gas or propane stoves, heaters, and fireplaces.
Materials and Construction
.020″ aluminum inner wall.
.018″ galvanized steel outer wall.
Painted outer walls made of laser-welded .018″ galvalume steel. Caps also available in stainless steel and copper. Outer pipe brings combustion air to the appliance. Inner pipe exhausts flue gases to the outside. Gaskets or sealants not required (unless specified by the appliance manufacturer).
Clearances
Specified by the appliance manufacturer.
Diameters
4″ x 6 5/8″ and 5″ x 8″.
Listings
DirectVent Pro, in combination with the gas appliance, has been tested and listed as a decorative gas appliance system or as a direct vent heater system by a major testing agency, such as UL, CSA, Warnock Hersey, or OMNI. Check with your appliance manufacturer for approval.
FAQ
What is the Direct Vent Factory Built Reline Kit?
A kit for installing a direct vent co-linear insert into an existing factory-built (zero-clearance) chimney. It includes a High-Wind Termination Cap, two lengths of aluminum flex for exhaust and combustion air, and four hose clamps. Select the 3 or 4 inch flex option on the page to suit the insert’s collars.
How is this different from the masonry co-linear kit?
The parts are matched to a factory-built chimney: the flex runs through the metal chimney’s inner pipe and the High-Wind cap terminates on top of it, following DuraVent’s zero-clearance section of the chimney liner instructions. The masonry kit offers cap choices and different flex lengths for a brick flue. Both are two-liner co-linear systems.
Does my old chimney have to be checked first?
Yes. The factory-built chimney must be intact and cleaned, and the insert manual must permit installation in a factory-built chimney using DuraVent’s co-linear system; DirectVent Pro is listed in combination with the appliance. The old wood-burning fireplace and chimney are being reused only as a chase for the liners.
How are the flex liners run and secured?
Draw them up with a flex puller, one at a time, without letting them sag, and join short pieces with a flex coupling if needed. The four hose clamps secure the flex to the insert connectors and the cap connector. Leave 2 to 3 inches of flex above the chimney top so the termination seats correctly.
What else might I need?
Co-linear flex connectors or a co-axial to co-linear adapter at the insert, as the insert manual specifies, and DuraVent’s Vertical Wind Guard if the roof is exposed. Those and the other DirectVent Pro co-linear parts are sold separately; clearances and maximum height come from the insert manual.