DM36 - 150mm ID 360mm sq. DM support block
At a Glance
- 150mm ID and 360mm square outer dimensions for versatile use
- Constructed from natural insulating pumice
- Double wall design optimises heat retention and minimises condensation
- Quick and simple installation with a 100mm high lower spigot for Adaptor connection
- HETAS approved and CE marked, ensuring safety and quality
- Compatible with wood-burning stoves, open fires, cookers, and various solid fuel, oil, or gas appliances

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 360mm square DM support block is a component of the Isokern DM (Double Module) block system, renowned for its superior quality and efficient design. This high-performance chimney solution maintains optimal flue gas temperatures while preventing heat transference to the outer casing, thanks to its double wall structure. The unique separation of the inner and outer components accommodates thermal movement, significantly reducing the risks of cracking, leaks, or stains.
This robust system is not only simple and quick to install but also versatile, available in three outer casing sizes: DM36, DM44, and DM54. Ideal for use with a range of appliances including stoves, open fires, cookers, and inserts burning wood, solid fuel, oil, or gas (excluding condensing appliances like Biomass & Pellets). Constructed from natural insulating pumice, the DM36 ensures rapid achievement of optimal flue gas temperatures, enhancing the performance of your heating appliance.
Its heat retention properties further minimise condensation and soot build-up, providing a cleaner, safer chimney. The Isokern DM system is HETAS approved and CE marked, bearing the designation number T450 N1 D 3 G(00) and is an excellent choice for reliable and long-lasting installation.
SKU: 59-130716
Technical Specifications | |
---|---|
Inner Diameter | 150mm |
Outer Dimension | 360mm square |
Height | 100mm |
Lower Spigot | 100mm high for Adaptor connection |
Material | Natural Pumice |
Designation DM System | EN1858 - T450 N1 D 3 G(00) |
Designation Liner System | EN1857 - T600 N2 D 3 G |
Warranty | 10 Years |
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 Friday, April 4th. 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
National Flues highly recommends the DM36 - 150mm ID 360mm square support block for its exceptional quality and performance. Whether you're a trade professional or a retail customer, our nationwide delivery and competitive pricing ensure you get what you need, when you need it.
The DM36 - 150mm ID 360mm square support block is used to support the structure and enhance the performance of the Isokern DM chimney system, ensuring safe and efficient operation of a variety of heating appliances.
Isokern is renowned for its innovative and high-quality chimney solutions. Their systems, including the DM series, leverage the unique insulating properties of pumice to provide efficient, durable, and safe chimney installations. National Flues proudly supplies Isokern products to trade and retail customers across the UK, ensuring reliable delivery and competitive pricing.
