We use cookies to ensure a smooth, secure, and ever-improving experience on our website. By continuing to browse, you agree to our use of cookies as detailed in our Cookie Policy. Enjoy your visit and let us now if you need any help!
Cookie Preferences
We use different types of cookies for various purposes. Please select which you allow:
DM44 - 180mm ID x 300mm high flue block (59-127068)
Elevate your chimney system with the Isokern DM44 - a high-performance 180mm ID x 300mm high flue block crafted from premium natural pumice. Ideal for a range of heating appliances including wood stoves, solid fuel systems, and oil or gas heaters, this reliable flue block boasts a double-wall design that maintains optimal temperatures and enhances safety. With HETAS approval and CE marking, the Isokern DM44 flue block is the trusted choice for efficient, durable chimney systems across the UK.
Hover to Zoom / Click for Gallery
Out of Stock – Pre-order Now
£37.49
Give us a call if you find it cheaper and we'll try to price match.
At a Glance
Premium natural pumice construction
Double-wall design maintains optimal flue gas temperature
HETAS approved and CE marked
Suitable for wood, solid fuel, oil, and gas appliances (excluding condensing systems)
Minimises condensation and soot build-up
Reliable thermal movement reducing crack and leak risks
×
Email Product
Enter your email address to send the product details:
Please Note: All dimensions refer to the internal diameter of flues.
If unsure, please call 01670 206999 to ensure you choose the correct products.
We Won't Be Beaten On Price
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.
Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
Operational Efficiency: We have streamlined processes to reduce overhead.
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.
The DM44 - 180mm ID x 300mm high flue block is a premium product within the Isokern Double Module (DM) System Chimney range. This high-quality flue block is crafted to ensure superior performance and longevity, making it an excellent choice for chimneys. The double-wall design retains flue gas temperatures while preventing heat transfer to the outer casing.
This unique structure allows for thermal movement, reducing the risk of cracking and potential leaks. Notably, the DM system is available in three outer casing sizes—DM36, DM44, and DM54—and is suitable for a wide range of applications, including wood, solid fuel, oil, and gas (excluding condensing appliances such as Biomass and Pellets). Constructed from natural pumice, the flue block has excellent insulating properties, ensuring that the chimney quickly reaches and maintains optimal operational temperatures.
This feature not only improves appliance performance but also minimizes condensation and soot build-up. Endorsed by HETAS and CE marked, the Isokern DM system is both reliable and compliant with industry standards.
SKU: 59-127068
Technical Specifications
Product Type
Chimney Flue Block
Model
DM44
Inner Diameter
180mm
Height
300mm
Outer Dimension
310 x 310mm
Material
Natural Pumice
Warranty
10 Years
System Designation (DM)
EN1858 - T450 N1 D 3 G(00)
System Designation (Liner)
EN1857 - T600 N2 D 3 G
Compliance
HETAS Approved, CE Marked
Fuel Compatibility
Wood, Solid Fuel, Oil, Gas (excluding condensing appliances)
Installation Instructions:
• Always ensure the chimney system is completely de-energised and cooled before starting installation.
• Refer to the detailed installation manual provided with your DM44 flue block for step-by-step guidance.
• Check that the surrounding area complies with recommended distances to combustibles (0mm on straights; 38mm on offsets for the DM System).
• Secure the flue block carefully in position, ensuring that joints are properly sealed and aligned to prevent potential leaks.
• It is advisable to have the installation performed or inspected by a qualified professional to ensure safety and maximum efficiency.
• Be aware of thermal movement allowances; the double-wall design is engineered to accommodate expansion and contraction, reducing the risk of damage over time.
The DM44 flue block’s key features include its double-wall design, natural pumice construction for superior insulation, suitability for various fuels, and compliance with HETAS and CE standards.
The DM44 flue block is compatible with wood-burning stoves, open fires, inserts, and cookers using solid fuel, oil, or gas. It is not suitable for condensing appliances, including Biomass and Pellets.
Pumice is a natural insulator that helps quickly achieve and maintain optimal flue gas temperatures. This improves the heating appliance's performance and reduces the likelihood of condensation or soot build-up.
The DM44 flue block has an inner diameter of 180mm and an outer dimension of 310 x 310mm, with a height of 300mm.
Yes, the DM44 flue block is designed for straightforward installation. Detailed installation instructions are available to guide you through the process.
Yes, the Isokern DM system, including the DM44 flue block, is HETAS approved and CE marked, ensuring it meets high-quality and safety standards.
The double-wall design maintains flue gas temperatures while preventing heat transference to the outer casing, allowing for thermal movement which reduces the risk of cracks and leaks.
Delivery Information +
We work relentlessly to ensure you get your order fast.
Estimated delivery for this product is Wednesday, April 30th.
If you need faster stove or fireplace delivery please give us a call.
We can often 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. Mi-Flex offers a lifetime guarantee.
Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
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.
Read our review in our DM44 - 180mm ID x 300mm high flue block buyers guide
Discover the DM44 – Your Ultimate Chimney Solution
When it comes to maintaining an efficient and safe heating system, the chimney plays a critical role. The DM44 - 180mm ID x 300mm high flue block is designed with both performance and safety in mind, making it an essential component for modern heating appliances. This comprehensive buyer's guide will walk you through the features, benefits, installation process, and key considerations to help you make an informed decision about upgrading your chimney system.
Product Overview
The DM44 flue block is manufactured by Isokern, a leader in the chimney industry, known for its innovative use of natural pumice. With a unique double-wall construction, this flue block is engineered to maintain high internal temperatures while preventing excessive heat transfer to its outer casing. This design not only improves the efficiency of your heating appliance but also minimises the risk of damage to nearby combustibles. The high standards of HETAS approval and CE marking further underscore its quality and reliability.
Why Choose the DM44 Flue Block?
- Superior Insulation: Crafted from natural pumice, the DM44 flue block offers exceptional insulation, ensuring that flue gases remain at optimal temperatures for efficient combustion. This immediate retention of heat minimises energy loss and enhances fuel efficiency.
- Robust Double-Wall Design: The double-wall architecture is a standout feature, ensuring that the system adapts to thermal movements. This significantly reduces the likelihood of cracks and leaks over time and adds to the longevity of your chimney system.
- Compliance & Safety: With rigorous testing and certification (HETAS and CE), the DM44 is a secure choice for both domestic and commercial installations. It adheres to the strictest safety standards, providing you with peace of mind.
- Versatility: Whether you heat your home using wood, oil, or gas, the DM44 flue block is compatible with a range of heating appliances. However, it is important to note that it is not suitable for condensing systems such as Biomass and Pellets.
Key Features & Benefits Explained
Naturally Insulating Material: The utilisation of natural pumice ensures quick thermal responsiveness and prolonged heat retention. This not only optimises the performance of your heating system but also reduces the build-up of condensation and soot, thereby lowering maintenance requirements.
Double-Wall Engineering: By maintaining a distinct boundary between the inner and outer walls, the design efficiently retains heat where it is needed most, while the outer structure remains cool enough to reduce risks to surrounding materials. This smart engineering boosts both the performance and safety of your chimney system.
Ease of Installation: The DM44 flue block is designed for hassle-free installation. Its standardised dimensions mean it integrates seamlessly with various chimney systems, and detailed installation instructions ensure that even less experienced installers can achieve professional results without complications.
Installation Insights
Installing a new flue block may seem daunting, but following clear, concise instructions can simplify the entire process. The DM44 comes with a comprehensive installation manual that guides you through every step, from preparing the site to sealing the junctions. Always remember that safety is paramount, so adhere strictly to the recommended distances from combustibles and allow for thermal expansion. If in doubt, consulting or hiring a qualified professional can ensure that your installation is both optimal and secure.
Addressing Common Objections
Cost vs. Value
It is natural to weigh the initial cost of a new flue block against projected benefits. While the DM44 may represent a higher upfront investment, its durability, efficiency, and low maintenance requirements significantly reduce long-term expenses. You are not merely purchasing a component; you are investing in enhanced safety and consistent heating performance that ultimately lead to energy savings.
Compatibility Concerns
Potential buyers often worry about compatibility with their existing systems. The DM44 flue block is designed to integrate smoothly with a broad array of heating appliances, ensuring that whether you are upgrading an older system or installing a new one, the DM44 will perform reliably. Also, with its clear installation guidelines, any compatibility issues are minimised.
Safety and Compliance
Safety standards are at the forefront when choosing a chimney component. The DM44 meets the critical HETAS and CE specifications, ensuring that it is rigorously tested and approved for use in demanding environments. This adherence to industry standards is a testament to its design quality and performance reliability.
Aesthetic and Structural Considerations
A sleek and robust design is essential not only for function but also for structural integrity. The DM44’s sleek external dimensions and robust build make it well-suited for discreet integration into modern architectures without compromising on performance. Its thoughtful design ensures both safety and visual compatibility with contemporary building aesthetics.
Making the Decision
Choosing the right chimney system component can significantly impact your overall heating efficiency and safety. The DM44 flue block, with its premium build, innovative design, and compliance with stringent safety standards, presents a compelling case. Whether you are upgrading an existing chimney or installing a new system, it is designed to meet the demands of modern heating applications with unmatched reliability.
Investing in the DM44 is not just a purchase; it is a commitment to a safer, more efficient heating system that will perform reliably for years to come. This robust component, backed by industry certifications and thoughtful design, ensures that your heating system operates at its best, providing comfort and safety consistently.
In conclusion, if you are seeking a chimney flue block that prioritises efficiency, durability, and safety, the DM44 is the ideal solution for you. It combines high-quality materials with engineering excellence to deliver a product that meets the challenges of modern heating systems head-on. Buy now or call 01670 206 999.
Compatible and other products that may be of interest...
