DM44 - 200mm ID x 150mm offset block
At a Glance
- Made from natural pumice for superb insulation and thermal efficiency
- Integral component of the Isokern DM chimney system – HETAS Approved and CE marked
- Designed for stoves, open fires, and cookers burning wood, solid fuel, oil, or gas (non-condensing)
- Ensures a safe 38mm clearance from combustibles on offset chimneys
- Comes with detailed installation guides for a seamless setup

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 - 200mm ID x 150mm offset block is an integral part of the high-quality Isokern Double Module (DM) chimney system. This advanced system is engineered for optimal thermal efficiency and safety, making it an excellent choice for various heating appliances, including stoves, open fires, and cookers that burn wood, solid fuel, oil, or gas (excluding condensing appliances like Biomass and Pellets). Constructed from pumice, a natural insulator, this block maintains flue gas temperatures and prevents heat transference to the outer casing.
The double-wall design allows for thermal movement, significantly reducing the risk of cracking, leaking, and staining. The DM44 system is available in three sizes: DM36, DM44, and DM54, ensuring the perfect fit for your chimney requirements. HETAS Approved and CE marked, the Isokern DM system guarantees top-notch quality and performance.
For ease of installation, detailed guides are provided.
SKU: 59-127687
Technical Specifications | |
---|---|
Dimensions | 440 x 500mm overall; 200mm ID x 150mm offset block; 86mm length with a 30u00b0 offset; 150mm height |
Material | Pumice |
Compliance | HETAS Approved, CE marked |
Clearance | 38mm from combustibles on offset chimneys |
Compatible Appliances | Stoves, open fires, cookers burning wood, solid fuel, oil, or gas (non-condensing) |
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
The DM44 offset block is a remarkable addition to any chimney system. Its advanced construction using natural pumice ensures optimal performance and safety. National Flues provides reliable delivery across the UK to both retail and trade customers.
The DM44 block is designed for high-efficiency chimney systems, ensuring optimal performance and thermal safety for various heating appliances.
Isokern is known for its innovative chimney solutions, utilizing natural pumice's unique insulating properties to create high-performing, safe, and efficient chimney systems.
