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    Superior/Vantage Hearth Outside Combustion Air Kit for B-Vent Gas Fireplaces

    List Price: $29.99
    Sale Price: $26.10
    You Save: $3.89 (13%)
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    Product Details
    Manufacturer: Vantage Hearth
    Part Number: AK4X
    eFireplaceStore Item Number: CUI-AK4X
    UPC: 043593043030


    • Outside Combustion Air Kit
    • For use with Wood-Burning and B-Vent Gas Fireplaces

    *Venting Requirements: This unit requires venting pipe with an inner diameter of 4 Inches. Please see the Venting Components section on this page for venting pipe that must be used with this unit.

    Some homeowners opt to use outside air to supply the flame in their fireplace. The primary reason for this lies in the fact that burning the inside air depletes the indoor oxygen level and can pose a risk. Burning air from the outside ensures that steady heat is available without using up indoor oxygen. This outside combustion air kit from Vantage Hearth allows you to use outside air to heat your home, keeping the oxygen inside at safe levels.
    Customer Questions & Answers
    8 Questions & 8 Answers
    from Show Low, AZ asked:
    April 3, 2017
    What are the measurements of the plastic piece that attaches to the exterior of the house?
    1 Answers
    The plastic hood measures roughly 6.5" x 6.5".
    Will M.
    on April 4, 2017

    from Charlotte, NC asked:
    June 23, 2016
    There are two mounting holes for screws in the top of the plastic cover to attach to the wall. Is the distance between those holes 5 3/8 inches so that I can use the same holes in the brick that were used for the prior product?
    1 Answers
    The holes on the external hood are 6" apart.
    Chris C.
    on June 24, 2016

    from Fort Worth, TX asked:
    April 25, 2015
    What are the mounting plate dimensions of this Vantage Hearth outside combustion air kit?
    1 Answers
    The mounting plate is 6.1" tall by 6.3" wide.
    Brennan W.
    on April 27, 2015

    from Pasadena, MD asked:
    June 18, 2014
    I received delivery of my CUI-VGL36PNP Vantage Hearth VGL36PNP Peninsula Smooth Face B-Vent Propane Fireplace with Refractory Fiber Logs and Brick Liner - 36 Inch. I originally purchased both outside air combustion kits with flexline (the one for B-Vent and the other: CUI-VAK4 and CUI-AK4X) but was credited back for the CUI-AK4X because I only needed the one. My installer says that he needs to use the B-Vent combustion one. I am putting the new fireplace in the location where I previously had a stand-alone propane stove which had a vent pipe through the ceiling to a chimney vent. I'm wondering if I also have the option to vent the new stove through the floor down into the crawlspace under my house since your company removed the B-Vent air kit from my order and left the other one. I'd like to use this stove instead of a ventless one, and he is suggesting that we go with a different stove. Can you help?
    1 Answers
    The outside air combustion kits that were on your order are both designed to pull fresh air from outside the home. The purpose is to provide a dedicated source of combustion air for the pilot and main burner assembly in the unit. They are not intended to vent exhaust gases from the unit. The combustion air kits can be used to pull air from a ventilated crawl space, but the unit must be vented vertically, using 6 inch diameter B vent pipe. From your first photo, it appears the old stove was vented by using a flexible aluminum or stainless steel corrugated liner, inside an existing Class A manufactured chimney. If the manufactured chimney is large enough and is to remain in place, a liner of the proper size could replace the existing one. What is the inside diameter of the existing chimney pipe and liner that is inside the pipe? Please advise at your convenience.
    on June 18, 2014

    from Atlanta, Ga asked:
    March 11, 2014
    Is there a screen or shield to prevent birds and other small creatures out?
    1 Answers
    The air intake hood does not include a screen from the factory, but a small bird screen can be easily made and attached to the hood, using 1/8 inch square metal mesh.
    Collin C. - NFI Master Hearth Professional
    on March 12, 2014

    from Atlanta Ga asked:
    March 11, 2014
    What is the size of the duct pipe?
    1 Answers
    This intake air system is configured for use with a 4 inch flexible metal duct. Rigid 4 inch aluminum can also be used if the intake air run is a straight shot to the outside wall.
    Collin C. - NFI Master Hearth Professional
    on March 12, 2014

    from Green Valley, IL asked:
    June 3, 2013
    Where does the outside vent hook to the fireplace and how does the air get into the combustion chamber? Does that interfere with the air circulating from the blower assembly?
    1 Answers
    On most models, the outside air knockout is located on the right side of the box, although a few models have the inlet on the left. There is a dedicated air supply tube that runs from the outer wall of the fireplace to directly behind the refractory panels. This tube prevents outside air from mixing with any circulating room air.
    Collin C. - NFI Master Hearth Professional
    on June 4, 2013

    Susan Jones
    from Kenna, WV asked:
    June 26, 2012
    We are installing vented gas logs without an existing fireplace. The "outside" wall for the new unit will be the inside wall of our existing room. In other words, we are installing a "fireplace" on the opposite wall from an existing room. We cannot go straight up with the vent line because of the 2 ft. overhang on our existing roof. Is it okay to use flexible vent pipe to angle thru the trusses on our new room to the roof?
    1 Answers
    While I cannot recommend that flexible pipe be used in this situation, it is possible to use a rigid chimney pipe with a pair of elbows to offset the run. I am not clear on how you will be building the fireplace enclosure however. There must be either a masonry fireplace to install the logs into or a manufactured fireplace must be installed with metal venting pipe. Given your intention to angle the pipe, the manufactured box seems to be your best option. Please advise what your plans are for this installation and I will be happy to assist you further.
    Collin C. - NFI Master Hearth Professional
    on June 26, 2012

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