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Sterling GG Concentric Vent Kit

Item #: 407090
This item ships by UPS GROUND
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(not available to AK and HI)
Price: $319 - $419
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    Availability: In Stock - Usually ships in 1 to 2 days.
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    Sterling GG heaters can be converted to separated combustion when this kit is added to the heater. Separated combustion heaters draw combustion air from outside to ensure that the unit will always have plenty of fresh clean air. The fresh air supply reduces common concerns about dusty, dirty, or high humidity applications. You can also decrease heating costs by as much as 10% because no cold outside air is being sucked into the structure when the heater is running. Pipe must be purchased separately.

    What does the concentric vent kit do? The concentric vent kit allows the air intake and exhaust to vent to the outside wall with only one hole as shown in the picture below. Use for horizontal or vertical venting.


    Concentric vent kits include:

    • Concentric vent box
    • Inlet air screen
    • Deflector disc
    • Vent cap
    • Silicone o-ring gaskets (3)
    • High-temp silicone

    (Model X7-4) The 4" concentric vent kit is for models GG30, GG45, GG60, and GG75.
    (Model X7-5) The 5" concentric vent kit is for models GG90, GG105, and GG120.
    *Older GG heaters may require these additional parts: air inlet collar and access panel gasket



    The concentric vent kit does not include any piping. A pipe kit must be purchased also to have a complete vent system. Please read the Sterling GG Concentric Vent Manual below to determine what your venting needs are.



    Product Manuals, Tips, Specs, & Guides

    Sterling GG 4" Concentric Vent Manual
    Sterling GG 5" Concentric Vent Manual


    Item # 407090, 4070900, 4070905

    Overall Customer Rating of 5 Reviews:
    review-star review-star review-star review-star review-star

    Work good

    Just got it all put togeather. Happy with it

    Sterling GG Concentric Vent Kit

    First rate quality build and materials. My only concern is the center line on the inlet and flue holes were off about an inch between this kit and the Sterling heater which required some “engineering” on my part. However the one question I called ACF Greenhouses was answered very efficiently and courteously. Good company to deal with.

    Sterling GG Concentric Vent Kit

    The kit was missing the brackets for the disc that mounts to the outside, but service person had replacements shipped out promptly after I notified them. I wish it came with mounting brackets for the main box. All in all I am satisfied with the construction quality of the kit and would purchase again.

    Concentric venting kit

    High quality materials. A must for concentric venting good instructions include. Fast shipping in a quality package arrived on time in perfect condition.

    Quality kit with everything you need to go concentric!

    I'm doing a self install and the ACF Greenhouse kits have proven excellent for a rookie like me. I went with the concentric exhaust kit to increase the efficiency of my GG75 in the garage. It is great to have everything I'd need packaged together - and comes with detailed instructions that were easy to follow. Five stars for sure!

    Contact Us

    Contact Us

    ACF Greenhouses
    380 Greenhouse Drive
    Buffalo Junction, Virginia 24529
    1-888-888-9050 toll free

    We Accept