DM36 - 150mm ID x 150mm high offset block
At a Glance
- - High-quality DM system block (EN1858 - T450 N1 D 3 G(00))
- - Superior thermal performance from natural pumice
- - Rapid appliance heating and sustained warmth
- - HETAS approved and CE marked for robust safety
- - Offset design ensures optimal clearance from combustibles

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 150mm high offset block from Isokern is part of their high-quality DM (Double Module) block system. This sophisticated chimney system effectively maintains flue gas temperatures while minimizing heat transfer to the outer casing. The clever separation of inner and outer components accommodates thermal movement, significantly reducing cracking risks.
Constructed from naturally insulating pumice, the DM36 ensures rapid heating of your appliance and sustained warmth, enhancing its performance and reducing condensation and soot build-up. Available in outer casing sizes DM36, DM44, and DM54, it is versatile for various heating applications, including stoves, open fires, inserts, and cookers burning wood, solid fuel, oil, or gas (excluding condensing appliances like Biomass and Pellets). HETAS approved and CE marked, the DM36 stands as a testament to high safety and quality standards.
SKU: 59-126378
Technical Specifications | |
---|---|
Dimensions | 150mm ID x 150mm high offset block; 360 x 435 offset (86mm, 30u00b0) |
Material | Pumice |
Insulation | Excellent thermal insulation properties ensuring rapid heat-up and sustained warmth |
Designations | DM System: EN1858 - T450 N1 D 3 G(00); Liner System: EN1857 - T600 N2 D 3 G |
Safety Approvals | HETAS approved and CE marked |
Compatibility | Suitable for wood, solid fuel, oil, and gas (non-condensing appliances) |
Warranty | 10 Years |
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
We at National Flues highly recommend the DM36 150mm ID x 150mm high offset block. It's a reliable and efficient choice, perfect for maintaining high flue gas temperatures. Our relationship with Isokern ensures top-quality products delivered nationwide. Retail and trade customers can both benefit from our unbeatable prices and secure online payments.
The DM36 150mm ID x 150mm high offset block is designed for constructing efficient, safe chimney systems that support various heating appliances.
Isokern is renowned for producing high-quality chimney systems with a focus on innovation, safety, and performance. Their products are widely used in both residential and commercial settings.
