DuraVent Model BV – Oval Installation Kit (USA only)

$46.04

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DuraVent Model BV Oval Installation Kit: three plates for the wall furnace vent, without pipe

The DuraVent Model BV Oval Installation Kit is a set of support plates for a 4 inch oval gas vent above a gas wall furnace. One base plate attaches the vent to the furnace. Two ceiling plate spacers hold the pipe in place at the first ceiling. These three pieces come together in one box, but the pipe does not. 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. Buy the oval pipe, adapter, roof parts, and spacers for any higher ceilings separately.

This kit is for use in the USA only. Oval Model BV is neither sold nor approved in Canada. The 4 inch oval vent is listed for both Type B and Type BW, the vent designation for a recessed wall furnace. For a wall furnace, DuraVent calls for at least 12 feet from the furnace bottom to the cap. Need pipe and an adapter too? The DuraVent Model BV Oval Vent Kit with pipe and adapter adds 4 feet of oval pipe and the connection to round vent. The DuraVent Model BV Oval Installation Kit ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.

Details

SKU: 4BVO-K

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 in the Model BV Oval Installation Kit?

Two Oval Ceiling Spacers and one Oval Base Plate, the support and firestop pieces for a run of 4-inch oval Type B gas vent. The base plate carries the vent at the bottom of the run and each ceiling spacer firestops and centers the oval pipe where it passes through a ceiling. The oval pipe itself is bought separately; the kit is sold in the USA only.

What is oval B vent used for?

Oval Type B gas vent is flattened so it fits inside a stud wall. DuraVent’s 4 and 5 inch ovals fit a 2 x 4 or 2 x 6 stud wall and the 6 inch fits a 2 x 6 wall, which is why it is the vent for wall furnaces and other gas appliances vented up through a partition. It serves natural gas or propane Category I, draft-hood appliances only.

What clearance does oval vent need inside the wall?

The same 1 inch of air space to combustibles as round Model BV, maintained by the ceiling spacers and base plate in this kit; the oval has a 1/4-inch annular air space between its aluminum inner and galvanized outer walls. Do not pack insulation into the clearance. For a wall furnace DuraVent requires at least 12 feet from the bottom of the furnace to the cap and a 16-inch stud space.

How does the oval vent join and terminate?

Oval lengths use DuraVent’s button lock. At the top of the wall an Oval-to-Round Adapter converts to round Model BV pipe for the run through the attic and roof, where the standard flashing, storm collar and DuraCap finish the job. The vent must be firestopped at every ceiling, and any vent more than 5 feet above the roof has to be guyed.

Which parts do I add to complete a wall-furnace vent?

Oval pipe lengths for the wall section, an Oval-to-Round Adapter, round Model BV lengths for the attic and roof, a flashing, storm collar and cap, plus an attic insulation shield if the vent crosses insulation. The Oval Vent Kit on the store bundles 4 feet of oval pipe with this kit’s parts; everything else is in the Model BV category.

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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