× National Flues
We Will NOT Be Beaten on Price.
Free Delivery on Orders Over £100
5 Star Reviewed on Trustpilot
Free Flue Design Service Available
Help? 01670 206999 (8am-5pm)

DM44 - 200mm ID x 440mm sq. DM support block

Discover the premium DM44 support block from National Flues – a top-quality chimney accessory expertly crafted for the Isokern DM system. Made from natural pumice, this support block delivers impressive thermal insulation and reliable performance. Perfect for those seeking a superior chimneystack so... More...
Hover to Zoom / Click for Gallery
Now only £106.49
Including VAT & Free Delivery Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

At a Glance

  • Superior insulation using natural pumice
  • Engineered for the Isokern DM double module system
  • Maintains optimum flue gas temperatures
  • HETAS approved and CE marked for safety
  • Versatile for wood, solid fuel, oil, and gas appliances (excluding condensing models)
  • Includes a lower spigot for secure adaptor connection
  • Backed by a 10-year warranty

 

Payment Options

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]

The DM44 - 200mm ID x 440mm Square Isokern DM Support Block is an essential component of the renowned double module (DM) system, delivering superior performance and reliability. This high-quality system chimney effectively maintains flue gas temperatures while reducing heat transfer to the outer casing, which prevents cracking, leaking, or staining. Made from natural pumice, known for its exceptional insulating properties, the DM44 allows flue gases to reach optimal temperature swiftly, enhancing your appliance's performance.

It also retains warmth longer, minimizing condensation and soot buildup. Suitable for various heating appliances, including wood, solid fuel, oil, and gas (excluding condensing appliances like Biomass & Pellets), the DM44 is versatile and user-friendly. It holds HETAS approval and CE marking, ensuring compliance with the highest safety standards.

SKU: 59-130730

Technical Specifications
Product NameDM44 - 200mm ID x 440mm sq. DM Support Block
Dimensions440mm square, 200mm internal diameter, 100mm high (including lower spigot)
MaterialNatural Pumice
ApprovalHETAS approved, CE marked
InsulationExcellent thermal retention with natural pumice
CompatibilitySuitable for wood, solid fuel, oil, and gas appliances (non-condensing)
Design FeatureLower spigot for secure adaptor connection
Warranty10 Years
Clearance0mm on straights; 38mm on offsets in DM System
• Ensure all components and accessories are available before starting installation. Refer to the detailed installation guide provided with the product. • Verify the measurements and clearances (0mm for straights and 38mm for offsets on DM System) to maintain safety standards. • Position the DM44 support block carefully to align the lower spigot with the adaptor connection, ensuring a stable and secure installation. • Follow all safety instructions and regulations as specified in the installation manual. Consider consulting a qualified professional if you are uncertain about any part of the process. • Note: Regular maintenance and inspections are advised to uphold performance and safety over time.

The DM44 support block is suitable for inserts, stoves, open fires, and cookers burning wood, solid fuel, oil, or gas. It is not recommended for condensing appliances, including Biomass & Pellets.

The Isokern DM system offers superior insulation, maintaining flue gas temperatures and reducing heat transfer to the outer casing. This minimizes the risk of cracking, leaking, or staining and enhances appliance performance.

Pumice is a natural insulator, helping flue gases quickly reach optimal temperatures and retaining warmth longer to reduce condensation and soot build-up, thus improving the overall performance of the heating appliance.

Yes, the DM44 support block is designed for straightforward and quick installation. Detailed installation instructions are available in the provided guides.

The Isokern DM support block is HETAS approved and CE marked, ensuring it meets the highest safety and quality standards.

The DM44 support block measures 440mm square with a 200mm internal diameter. It features a lower spigot for adaptor connection and stands 100mm high.

Yes, by maintaining flue gas temperatures and reducing heat transference, the DM44 support block helps prevent cracking and leaking, which in turn reduces the risk of chimney staining.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. 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.

Compatible and other products that may be of interest...

Read our buyers guide for this DM44 - 200mm ID x 440mm sq. DM support block

National Flues Ltd Verdict

The DM44 Isokern DM Support Block is a top-tier choice for your chimney setup. Perfect for maintaining flue gas temperatures and ensuring safety, this support block is both reliable and efficient. With nationwide delivery and tailored services for both retail and trade customers, National Flues is rarely beaten on price and service.

The DM44 support block is designed to provide superior support and insulation for your chimney, ensuring optimal performance and safety for a range of heating appliances.

National Flues is a trusted supplier of fireplaces and flues across the UK, serving both retail and trade customers with reliable delivery and competitive pricing. Our range includes industry-leading products backed by excellent customer service.

 

Our Rating Image

Secure the DM44 support block today for unparalleled chimney performance and reliability.

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal
Free Design Service