DuraVent DirectVent Pro Chimney Conversion Kit: reuse a wood stove’s metal chimney for gas
The DuraVent DirectVent Pro Chimney Conversion Kit is a connection kit that lets a gas stove use an old wood stove chimney. It fits a 4 by 6 5/8 inch stove outlet. The included cap adapter goes on top, and the retro connector joins the black stove pipe at the bottom. A 4 inch aluminum flexible liner carries exhaust inside the chimney while outside air enters around it. 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. The sealed fire uses no room air.
Choose Kit A, B, or C to match your existing chimney’s brand and size. Buy the cap, flexible liner, and black stove pipe separately. This conversion is for a chimney supported at the ceiling, not one routed through a wall. Have a chimney sweep inspect it first to confirm it is sound. Your stove maker must allow this setup, and the vent must serve only that stove. Have a brick chimney? See the DuraVent DirectVent Pro Masonry Chimney Conversion Kit. The DuraVent DirectVent Pro Chimney Conversion Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 46DVA-KCA | 46DVA-KCB | 46DVA-KCC
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 DirectVent Pro Chimney Conversion Kit for?
It converts an existing through-the-ceiling wood-stove metal chimney into a direct vent for a 4 x 6-5/8 inch gas stove. The kit contains a Cap Adapter for the top of the old chimney and a Retro Connector for the bottom; a 4-inch flex liner runs between them inside the old chimney to carry the exhaust while the chimney itself supplies combustion air.
What do Kit A, Kit B and Kit C mean on the selector?
They match the Class A chimney the cap adapter seats on, per the DirectVent Pro catalog. Kit A (46DVA-KCA) fits 5 to 6 inch DuraTech and most 6 inch chimneys plus 6 to 7 inch American Metals and Metal-Fab. Kit B (46DVA-KCB) fits 6 inch DuraPlus, 7 to 8 inch DuraTech and most 7 to 8 inch brands. Kit C (46DVA-KCC) fits 7 to 8 inch DuraPlus and 8 inch American Metals, Air-Jet and Metal-Fab; full list on the page.
What else do I need to complete the conversion?
A DirectVent Pro 4 x 6-5/8 inch termination cap approved for your stove, 4-inch flex cut to the chimney length, and the black pipe and elbow from the stove to the Retro Connector; all are sold separately in the DirectVent Pro category. The old chimney must be in good condition and should be inspected first.
How does the liner connect at each end?
Following DuraVent’s L904 instructions, the flex is screwed to the Cap Adapter at the top, passed down through the existing chimney, pulled about 3 inches out of the bottom and screwed to the Retro Connector with the sheet metal screws supplied, then pushed back up so the connector seats in the old chimney; the stove’s vent pipe twist-locks onto the connector.
Is this approved for my stove?
Only if the stove manufacturer permits venting through a converted Class A chimney and lists DuraVent DirectVent Pro; the system is listed in combination with the appliance and the stove manual sets the clearances and maximum vent height. It is for direct vent natural gas or propane stoves, not for wood or pellet appliances.