DM36 - 150mm ID x 250mm high flue block
At a Glance
- Maintains optimal flue gas temperatures with effective insulation
- Constructed from natural pumice for durability and efficiency
- HETAS approved and CE marked for guaranteed safety
- Versatile design suitable for wood, oil, gas, and solid fuels
- Quick and straightforward installation with comprehensive guides

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.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
- Install
- FAQs
The DM36 - 150mm ID x 250mm high flue block is part of the renowned Isokern DM block system, a high-quality solution for your chimney needs. This double-module system excels in maintaining optimal flue gas temperatures while preventing heat transfer to the outer casing, making it a superior choice for longevity and efficiency. Constructed with natural pumice, a unique insulator, the DM36 ensures that the flue gases quickly reach and maintain optimal temperatures, enhancing the performance of your heating appliance.
This property also reduces the risk of condensation and soot build-up, providing a cleaner and more efficient operation. The DM36 is versatile, suitable for use with inserts, stoves, open fires, and cookers burning wood, solid fuel, oil, or gas, excluding condensing appliances like Biomass and Pellets. Adhering to the highest industry standards, the Isokern DM is HETAS approved and CE marked, guaranteeing quality and safety.
Installation is straightforward, supported by comprehensive guides.
SKU: 59-126369
Technical Specifications | |
---|---|
SKU | 59-126369 |
Designation DM System | EN1858 - T450 N1 D 3 G(00) |
Designation Liner System | EN1857 - T600 N2 D 3 G |
Warranty | 10 Years |
Material | Natural Pumice |
Dimensions | 150mm ID x 250mm high |
Distance To Combustibles | 0 on straights; 38mm on offsets on DM System |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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. If you find it cheaper within 48 hours, we'll refund the difference.
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National Flues Ltd Verdict
The DM36 - 150mm ID x 250mm high flue block is a premium choice for your chimney needs. Reliable, efficient, and easy to install, it’s a top pick for both retail and trade customers. With nationwide delivery and competitive pricing, National Flues is your go-to supplier.
The DM36 - 150mm ID x 250mm high flue block is used to create a robust inner liner within the chimney casing, ensuring optimal thermal insulation and efficiency.
Isokern is renowned for its high-quality chimney systems, utilizing the natural insulating properties of pumice to enhance performance and safety.
