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DM44 - outer casing (59-130727)

Discover the exceptional DM44 outer casing from Isokern, a leading name in high-quality chimney systems. This innovative outer casing is an integral part of the Isokern Double Module (DM) block system, designed to provide superior insulation and performance. Its natural pumice construction ensures rapid heat retention and maintenance of optimal flue gas temperatures, making it ideal for stoves, open fires, and cookers operating on wood, solid fuel, oil, or gas. Enhance your chimney system with this high-performance outer casing and explore the range of optional accessories available to further tailor your installation.
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£62.49
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At a Glance

  • Robust design engineered for the Isokern Double Module system
  • Constructed from natural pumice for superior insulation
  • Measures 440mm square by 300mm high for precision fit
  • Reduces risk of cracking, leaking, and staining
  • Suitable for use with stoves, open fires, inserts, and cookers burning wood, solid fuel, oil, or gas (non-condensing appliances)
  • HETAS approved and CE marked with a 10-year warranty

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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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.
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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).

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The DM44 outer casing is a key component in the Isokern Double Module (DM) block system, renowned for its high quality and exceptional performance. This advanced double wall system efficiently maintains flue gas temperatures and prevents heat transference to the outer casing. The innovative separation of inner and outer components supports thermal movement, significantly reducing the risk of cracking, leaking, or staining.

The DM44 is part of a system available in three sizes—DM36, DM44, and DM54—offering versatile options for various applications. Constructed from natural pumice, a superb insulator, the DM44 outer casing ensures flue gases reach optimum temperature quickly, enhancing the heating appliance's performance soon after ignition. It also retains heat effectively as appliance output decreases, reducing condensation and soot build-up.

Compatible with inserts, stoves, open fires, and cookers using wood, solid fuel, oil, or gas (excluding condensing appliances like Biomass and Pellets), this product is versatile and reliable. Fully approved by HETAS and CE marked, the Isokern DM system promises compliance with stringent safety and performance standards. For precise installation, refer to the provided installation guides.

SKU: 59-130727

Technical Specifications
Dimensions440mm square, 300mm high
MaterialNatural Pumice
Warranty10 Years
Fuel CompatibilityWood, Solid Fuel, Oil, Gas
Safety ApprovalsHETAS approved, CE marked
Available SizesDM36, DM44, DM54
System CompatibilityIsokern Double Module (DM) block system
• Read the detailed installation guides provided with the product for a precise setup. • Ensure all clearances are observed: 0mm clearance on straights and 38mm on offsets as specified for the DM System. • Verify that the outer casing is compatible with your heating appliance and that installation follows manufacturer instructions. • Always check local building regulations and safety standards before installation. • Note: Incorrect installation can affect performance, so professional advice is recommended if unsure.

The DM44 outer casing measures 440mm square and is 300mm high.

The DM44 outer casing is constructed from natural pumice, which acts as an effective insulator.

The DM44 is suitable for use with inserts, stoves, open fires, and cookers burning wood, solid fuel, oil, or gas, but not compatible with condensing appliances including Biomass and Pellets.

The pumice construction helps flue gases reach optimal temperatures quickly and retains heat longer, aiding appliance performance and reducing condensation and soot build-up.

Yes, the Isokern DM system, including the DM44 outer casing, is HETAS approved and CE marked, meeting stringent safety and performance standards.

Detailed installation instructions can be found in the provided guides that accompany the product.

Yes, the DM outer casing is available in three sizes: DM36, DM44, and DM54.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, April 30th. 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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our DM44 - outer casing buyers guide

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Secure the DM44 outer casing today for a robust, efficient chimney system that stands the test of time.

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