DM44 - 180mm ID x 600mm high access flue block
At a Glance
- HETAS Approved & CE Marked
- High-quality pumice construction for optimal insulation
- Compatible with wood-burning stoves, open fires, cookers, and non-condensing gas appliances
- Part of the versatile Isokern DM system offering multiple casing sizes
- Engineered to minimise heat transference and allow thermal movement

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 DM44 - 180mm ID x 600mm high access flue block is an integral part of the Isokern DM block system, renowned for its exceptional quality and performance. This double module system is designed to maintain optimal flue gas temperatures while minimising heat transference to the outer casing. By keeping the inner and outer components separate, the system allows for thermal movement, reducing the risk of cracking and subsequent leaks.
Quick and easy to assemble, the DM44 is part of a range that includes three outer casing sizes: DM36, DM44, and DM54. This versatile flue block is compatible with various heating appliances, such as wood-burning stoves, open fires, and cookers using solid fuel, oil, or gas (excluding condensing appliances including Biomass & Pellets). Pumice, a natural insulator, is the key material in this product, offering exceptional thermal properties that help maintain optimal appliance performance and minimise condensation and soot build-up.
HETAS Approved and CE marked, the Isokern DM system boasts impressive certification, ensuring reliable and safe usage. For installation guidance, refer to the provided manuals.
SKU: 59-130717
Technical Specifications | |
---|---|
Internal Diameter | 180mm |
Access Block Dimensions | 310 x 310mm |
Height | 600mm |
Material | Pumice |
Certification | HETAS Approved, CE Marked |
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
The DM44 - 180mm ID x 600mm high access flue block is a stellar addition to any chimney system. Its robust construction and insulating properties make it a reliable choice. Plus, we offer nationwide delivery and cater to both retail and trade customers, rarely beaten on price.
The DM44 - 180mm ID x 600mm high access flue block is designed to provide efficient and safe flue gas management for a range of heating appliances, enhancing performance and reducing risks of leaks and condensation.
National Flues is a leading supplier of high-quality fireplaces and flues, serving both retail and trade customers nationwide. Committed to delivering exceptional products at competitive prices, with reliable delivery and secure online payment options.
