DuraVent Model BV – Oval Vent Kit (USA only)

$444.83

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DuraVent Model BV Oval Vent Kit: the wall furnace vent’s in wall parts in one box

The DuraVent Model BV Oval Vent Kit is a set of 4 inch oval vent parts for the run inside a wall above a gas wall furnace. It includes two 24 inch pipe lengths, a base plate, two ceiling plate spacers, and an adapter that changes the oval connection to round. You get 4 feet of oval pipe, with round Model BV continuing above the wall. Model BV is DuraVent’s Type B gas vent, the double wall pipe that carries the exhaust from a gas furnace, boiler, or water heater out of the house.

The oval pipe has an aluminum inside wall and a galvanized steel outside wall, with air between them. Its joining sleeve presses into place one side at a time. A screwdriver can ease the connection apart without damage. Buy the round pipe, roof flashing, storm collar, and cap separately. Any firestop spacer needed above the first ceiling, which separates the opening from the floor above, is also separate. Only need the plates? See the DuraVent Model BV Oval Installation Kit with three plates. The DuraVent Model BV Oval Vent Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

Details

SKU: 4BVO-VK

Applications

Duravent’s Type B Gas Vent system. Use with natural gas or liquid propane Category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.

Materials and Construction

Round Type B Gas Vent 3″ – 8″ and Oval 4″ – 6″: Aluminum .012″ inner wall, galvanized .018″ outer wall, in Canada, the lengths have a galvalume .018″ outer wall. The 3″ – 8″ Round gas vent features DuraLock® and DuraTab® . The Oval gas vent features the button lock.

Round Type B Gas Vent 10″ – 18″: Aluminum .014″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.

Round Type B Gas Vent 20″ – 30″: aluminum .023″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.

Clearances

Clearances to combustible materials in single and multi-family dwellings:

  • 1″ Clearance – USA – 3″ to 30″
  • 1″ Clearance – Canada – 3″ to 24″
  • 2″ Clearance – Canada – 26″ to 30″

Annular insulating air space

  • 3″ – 8″ Round Vent: 1/4″ air space
  • 4″ – 6″ Oval Vent: 1/4″ air space
  • 10″ – 30″ Round Vent: 1/2″ air space

Diameters

  • 3″- 6″

Listings

UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).

Instructions

Typical Installation

Small Diameter – Vertical Installations

SmallDiameterVent2.0-scaled_
Item Clearance - See Note 1 Max Height Outer Tube Ø Materials Locking Device UL Listing
Type B Vent Round 3″-8″ (USA) 1 inch 100 feet 1/2″ larger than ID Inner – .012″ Aluminum Outer – .018″ Galvanized DuraLock & DuraTab MH2848
Type B Vent Round 3″-8″ (CAN) 1 inch 100 feet 1/2″ larger than ID Inner – .012″ Aluminum Outer – .018″ Galvalume* DuraLock & DuraTab MH2848
Round 10" to 18" - See note 2 1 inch 100 feet 1″ larger than ID Inner – .014″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
Round 20″ to 30″ (USA) See note 2 1 inch 100 feet 1″ larger than ID Inner – .023″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
Round 20″ to 24″ (CAN) See note 2 1 inch 100 feet 1″ larger than ID Inner – .023″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
Round 26″ to 30″ (CAN) See note 2 2 inch 100 feet 1″ larger than ID Inner – .023″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
Oval Type B Gas Vent 4″ and 5″ 1 inch - See Note 5 See Note 3 4": 2 1/2″ x 7 1/4″ or 5": 3 1/8″ x 10 7/8″ Inner – .012″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
Oval Type B Vent 6″ 1 inch - See Note 5 See Note 3 3 1/4″ x 12″ Inner – .012″ Aluminum Outer – .018″ Galvanized DuraLock MH2848
DuraConnect I Flex 3″ and 4″ 1 inch See Note 4 NA .012″ Aluminum Flexible .018″ Galvalume Fittings DuraLock & DuraTab MH17667
DuraConnect II Flex 3″ to 5″ 1 inch See Note 4 1/4″ larger than ID .006″ 2 Ply Aluminum Flex .018″ Galvalume Fittings DuraLock & DuraTab MH17667

 

*In Canada, the outer tube material is galvalume for 3″ to 8″ pipe length. All other 3″ to 8″ fittings have a galvanized outer tube.

Notes: Gas Vent Specification Chart

  1. Clearance to combustibles is the air space between vent and combustibles.
  2. For maximum height refer to the appliance manufacturer installation instructions and the National Fuel Gas Code NFPA 54 or the Canadian Fuel Gas Installation Code CSA-149.1-00. For taller applications refer to Duravent Sizing Handbook.
  3. When oval is used on wall furnaces, minimum height required from bottom of furnace to cap is 12′, minimum 16″ stud space.
  4. Limited by sizing tables.
  5. BVO 4″ & 5″ oval can be installed in a 2″ x 4″or a 2″ x 6″ stud wall. BVO 6″ oval can be installed in a 2″ x 6″ stud wall.

Product Resources

Catalogs

Bulletins

Sales Sheets

Spec Sheets

Videos

Model BV Installation Video – English

https://youtu.be/4BZdKJimAG0?si=AGyqfm812eqg_0Mj

Universal Vent Cap

https://youtu.be/oRiAnyoFY50?si=IL3qoQb622fYxvHY

Duravent DuraCap

https://youtu.be/PwqzgOc2ScA?si=5ZmsWIog7XEm2jc8

FAQ

What is included in the Model BV Oval Vent Kit?

Two 24-inch lengths of 4-inch oval Type B gas vent, one Oval Base Plate, two Oval Ceiling Spacers and an Oval-to-Round Adapter. That is the in-wall portion of a wall-furnace vent: 4 feet of oval pipe with its support and firestops, and the adapter that lets round Model BV continue from the top of the wall. It is available in the USA only.

Which appliances is this kit for?

Natural gas or propane Category I appliances with a draft hood or listed for Type B gas vent, typically a wall furnace or a gas space heater vented up inside a 2 x 4 or 2 x 6 stud wall. It is not for wood, pellet or condensing appliances. The furnace manual should name Type B oval vent and give the vent size; 4-inch is this kit’s size.

How tall does a wall-furnace vent have to be?

DuraVent requires a minimum of 12 feet from the bottom of a wall furnace to the cap when oval vent is used, and at least 5 feet of vent above any appliance draft hood in general, with the appliance manual and the fuel gas code setting the final height. The 4 feet of oval pipe in this kit covers the wall; round Model BV lengths make up the rest above the adapter.

What clearance and firestopping apply?

Keep 1 inch of air space to combustibles; the base plate and ceiling spacers hold that spacing and firestop each ceiling the vent passes. Never fill the gap with insulation and use an attic insulation shield where the round vent crosses an attic. The ovals are aluminum inside and galvanized outside with a 1/4-inch air space, listed to UL 441.

What do I still need to finish the run?

Round Model BV pipe from the Oval-to-Round Adapter to the roof, a flashing for the roof pitch, a storm collar and a DuraCap, all in the Model BV category; the Roof Top Term Kit bundles the top parts. Oval lengths button-lock together and the draft hood connector attaches to the furnace with three sheet metal screws.

Shipping / Freight / Return Info

Same-Day / 24 hour shipping

Same-Day/24 hour shipping - If we have the product in stock, we can ship same day if ordered before 12pm Monday - Friday (CST).

Freight Claims Policy

Please follow these very important steps when it comes to Freight Items that are damaged or missing
  • Open and inspect the order while the delivery driver is present. If delivery driver does not provide sufficient time to do so, please notate the delivery receipt.
  • By signing the delivery receipt without noting any damage or missing items, you confirm that your order arrived complete and in excellent condition.
  • Record any damage or missing pieces directly on the delivery receipt.
  • Do not discard damaged item(s) or any original packaging. For severe damage, write “Refused due to damage” on the delivery receipt and contact us immediately.
  • Report any damage within two business days, including delivery details and photos showing the issue
  • Damaged item(s) must be returned within 30 days. Failure to return them will result in a charge to the original payment method.

Return Merchandise Authorization Policy

Please follow these very important steps when Returning Items. Contact our team.
  • Submit your return request within 30 days of delivery.
  • You will receive an email within 1-2 business days confirming whether your return request has been approved or denied.
  • Please also note that a 20% restocking fee may apply to approved returns
  • If approved, you will receive an itemized Return Authorization, return shipping labels (if requested), and detailed instructions within 1–2 business days
  • From the date this email is received, you will have 14 days to return the product.
  • Once our distributor receives and inspects the returned item(s), your refund will be issued within 1–2 weeks
  • Items returned outside of this process or time frame are not eligible for a refund.

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