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DM44 - 180mm ID x 100mm high offset block (59-131810)

The DM44 Offset Block by Isokern is a high-performance chimney flue component designed for efficiency and safety. As part of the innovative Isokern DM Block System, this 180mm ID, high offset block is a premium solution for constructing insulated chimney systems. Ideal for use with various heaters including wood, solid fuel, oil, and gas appliances, the DM44 ensures rapid heat-up and long-lasting reliability. With all necessary approvals such as HETAS and CE marking, this Isokern product is perfect for those seeking a dependable, high-quality chimney solution.
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At a Glance

    Double-module Isokern DM Block system for enhanced thermal efficiency

    Constructed from premium pumice, ensuring rapid heat-up and insulation

    Designed with a 180mm inner diameter and 100mm height, featuring a 30° offset for optimal performance

    Provides essential safety with a 38mm combustibles clearance on offsets

    Fully HETAS approved and CE marked for your peace of mind

Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 15th. This is based on current lead times for this product. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

Warranty & Returns +

All our products come with warranties and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

Best Price Match Guarantee +

We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:

  • Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
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Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.

Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).

“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.

Have Questions?
Phone: 01670 206999
Email: [email protected]

The DM44 - 180mm ID x 100mm high offset block is an integral part of the Isokern DM block system, designed for premium chimney performance. This double-module system not only maintains optimal flue gas temperatures but effectively prevents heat transference to the outer casing, enhancing safety and efficiency. The innovative separation of inner and outer components allows for thermal movement, significantly reducing the risk of cracking, leaks, or staining over time.

Available in three outer casing sizes (DM36, DM44, and DM54), this versatile system is ideal for use with various heating appliances, including inserts, stoves, open fires, and cookers that burn wood, solid fuel, oil, or gas (excluding condensing appliances). Pumice, renowned for its natural insulating properties, ensures the chimney swiftly reaches optimal temperature, thereby enhancing appliance performance while mitigating condensation and soot build-up. HETAS approved and CE marked, the Isokern DM system guarantees both efficiency and safety.

For seamless installation, detailed guides are available.

SKU: 59-131810

Technical Specifications
Inner Diameter180mm
Height100mm
Offset30u00b0
Overall Dimensions440mm x 500mm
MaterialPumice
Safety Clearance38mm to combustibles on offsets; 0mm on straights
Warranty10 Years
ComplianceHETAS approved, CE marked
Before installation, ensure you have reviewed the detailed guides provided by Isokern for a secure and compliant chimney flue setup. Verify that the installation area maintains the recommended clearance of 38mm from any combustible materials when using offsets. It is advisable to plan for thermal expansion by carefully following the installation instructions, ensuring that the inner and outer modules are correctly aligned and adequately supported. For safety, always use a licensed installer and consult local building regulations. Optional accessories such as flue connectors, additional sealing kits, and chimney cleaning tools are available to further enhance the installation and maintenance of your chimney system.

The DM44 Offset Block is used as part of the Isokern DM block system for constructing highly efficient and safe chimney flues.

Yes, it is suitable for wood, solid fuel, oil, and gas. However, it is not suitable for condensing appliances, including Biomass and Pellets.

Pumice is a natural insulator that helps the chimney quickly reach its optimal temperature, enhancing the performance of the heating appliance and reducing condensation and soot build-up.

Yes, the Isokern DM system, including the DM44 Offset Block, is HETAS approved and CE marked.

Yes, it is suitable for use with inserts, stoves, open fires, and cookers.

Installation is straightforward, and detailed instructions are available in the installation guides provided by Isokern.

The DM44 Offset Block utilizes pumice, which is an excellent natural insulator. This ensures higher efficiency, reduced risks of cracking and leaks, and better performance of your heating appliance.

What our experts say!

"The DM44 Offset Block is a stellar choice for anyone looking to upgrade their chimney flue system. At National Flues, we pride ourselves on our reliable delivery and competitive pricing, serving both retail and trade customers nationwide."

The DM44 Offset Block is designed for constructing high-performance, insulated chimney flue systems as part of the Isokern DM block system.

Isokern is renowned for its innovative and high-quality chimney solutions, employing natural pumice to ensure optimal performance and safety in heating systems.

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