DuraVent - DuraTech 6" Diameter Square Ceiling Support Box w/ Collar

Save $35.20
DuraVentSKU: 6DT-CS24RIS

Sale price$316.72 Regular price$351.92
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Height: 24" Reduced Clearance Square Ceiling Support Box w/ Collar

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Introducing the DuraVent DuraTech 6" Ceiling Support Box – the ultimate solution to enhance the safety and efficiency of your chimney system. Duravent is proud to present this innovative product, now equipped with a Square to Round Insulation Collar, offering you the peace of mind you deserve when it comes to safeguarding your home against debris and ensuring your chimney's optimal performance.

Crafted to meet the highest standards of quality and durability, our 6" Diameter Square Ceiling Support Box w/ Collar is your key to enjoying a worry-free and well-protected fireplace or stove. Whether you have a flat, vaulted, or cathedral ceiling with an attic space above, this support box is your ideal companion. It supports up to 40 feet of DuraTech Chimney, making it a versatile and reliable choice for your heating appliances.

The enhanced Insulation Collar not only fortifies the support box but also qualifies it as an Attic Insulation Shield, eliminating the need for an additional Attic Insulation Shield (DT-AIS) that's required with other support boxes. This means you can save both time and money while ensuring the safety of your home.


1. Enhanced Safety: The Square to Round Insulation Collar provides superior protection, keeping debris at bay and ensuring your chimney system stays in top condition.

2. Versatile Compatibility: Ideal for use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, and more, fueled by wood, oil, coal, or gas.

3. Reduced Clearance: Say goodbye to the usual 2" clearance – our Reduced Clearance Square Ceiling Support Box offers a mere 1" clearance per side, allowing for more flexible installation.

4. Money-Saving: With no need for an additional Attic Insulation Shield, you'll save on both the cost and installation time.

5. Durability: Crafted to the highest quality standards, this support box is built to last, giving you long-lasting protection for your chimney system.

6. Easy Installation: Designed with installers in mind, the DuraVent DuraTech 6" Ceiling Support Box is straightforward to set up, reducing installation time and hassle.

7. Peace of Mind: When it comes to the safety of your home and family, trust in DuraVent's decades of experience and innovation in chimney systems.

Product Details and Dimensions:

Size 6" Diameter Square Ceiling Support Box w/ Collar
A 6 1⁄4”
B 9” 
C 12”
Part no.
6DT-CS24IS 24"
6DT-CS24RIS 24" Reduced Clearance
6DT-CS36IS 36"


DuraTech is a double-wall, all-fuel chimney system for use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, or other appliances fueled by wood, oil, coal, or gas, and zero-clearance fireplaces that are factory-built.


Saves the installer money from buying and installing the additional Attic Insulation Shield required on other support boxes. Reduced Clearance Square Ceiling Support Box reduces the usual 2” clearance to 1” clearance per side.


    About the Manufacturer:

    Consistently the first to market with new innovations in venting systems, DuraVent has captured a leadership position in emerging markets. DuraVent has patents for several products and continues to design safe and technologically advanced venting.The company’s research into solving problems with corrosion, when biofuels such as corn are used, led to the break-through patent for PelletVent Pro.

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    Order Confirmation:

    Upon placing your order, you will promptly receive an email confirmation. Subsequently, we will conduct a thorough inventory check to ensure all items are in stock and available for immediate shipment. If your order aligns with the advertised delivery timeframe, we will promptly process it for shipment to our warehouse. In cases where the expected delivery time extends beyond the advertised timeframe, we will reach out to you via email and/or phone for confirmation.

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    Estimated Time of Arrival:

    Our typical delivery timeframe ranges from 2 to 10 business days. Custom-made products generally require 3 to 5 weeks for delivery. If the expected delivery date for your order would fall outside of the advertised 2-10 business day time frame, our customer service team will contact you to ensure your agreement with the revised timeline.

    Covered Areas:

    Please note that all estimated delivery dates and shipping costs advertised on our website apply exclusively to the Contiguous United States. For inquiries regarding shipping to Hawaii or Alaska, kindly reach out to our customer service team. While we do not offer direct shipping to Canada, we are more than willing to ship your order to the freight carrier of your choice.


    It is very important that you inspect the packaging of your items when they arrive and check if you received all boxes listed on the delivery receipt. If you notice any damage or shortage of packages, you must make note of it on the bill of lading, take pictures, and refuse delivery. Your note should say "refused due to damage". You must also take photos of all sides of the box and send them to us within 2 days. If there are no damages visible before opening the box, you must note "subject to further inspection may contain concealed damage". If you notice any damage after receiving the delivery, do not throw the box away, and contact us with the photos. After we receive information from you about the refused delivery or concealed damage, we immediately initiate a claim with the shipping company or with the manufacturer. After the claim is fully processed, we ship all replacements at absolutely no cost to you.

    Cancellations & Refunds:

    We offer free order cancellations before the shipping label or Bill of Lading is generated, or prior to the commencement of production for custom orders. Please note that custom-made items are not eligible for refunds once production has begun. To be eligible for a return, the item must be unused and in its original condition, with all packaging intact and in perfect condition. Orders delivered outside of the United States are not eligible for refunds. If your order arrives damaged, please refer to the "Damages" section. Our refund policy extends for 30 days. If 30 days have elapsed since your purchase, regrettably, we cannot process a refund. Prior to returning an item, please contact us to discuss shipping details. All refunds will be credited to the original credit card or PayPal account used for the purchase, within two days of receiving the returned items at our warehouse.

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