DM54 - 345mm ID x 150mm high starter flue block
At a Glance
- - 345mm internal diameter and 150mm height for optimal flue initiation
- - Constructed from natural, insulating pumice
- - Rapid temperature attainment for consistent performance
- - HETAS approved and CE marked for safety and quality
- - Versatile compatibility: supports wood, solid fuel, oil, and gas (non-condensing)
- - Reduces condensation and soot build-up
- - Easy installation for professionals and DIY enthusiasts
- - Backed by 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.
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 DM54 - 345mm ID x 150mm high starter flue block is an exceptional component in the Isokern DM chimney system. This double-module (DM) system is designed to maintain optimum flue gas temperatures while preventing heat transference to the outer casing, making it a high-quality system chimney. Featuring a pumice construction, known for its natural insulating properties, the DM54 flue block ensures rapid temperature attainment and consistent performance.
It keeps the chimney warm longer, aiding in reducing condensation and soot build-up. Available in three outer casing sizes - DM36, DM44, and DM54, this system is compatible with inserts, stoves, open fires, and cookers using wood, solid fuel, oil, or gas (excluding condensing appliances such as Biomass and Pellets). The system is HETAS approved and CE marked, ensuring safety and compliance with international standards.
Easy to install, the DM54 starter flue block is a reliable choice for both professionals and DIY enthusiasts.
SKU: 59-129093
Technical Specifications | |
---|---|
Internal Diameter | 345mm |
Height | 150mm |
Material | Pumice |
Warranty | 10 Years |
System Compatibility | DM36, DM44, DM54 |
Certifications | HETAS approved, CE marked |
Use | For inserts, stoves, open fires, cookers (wood, solid fuel, oil, gas) |
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 DM54 starter flue block is a top-tier product that ensures high performance and safety for various heating appliances. Perfect for both retail and trade customers, we are proud to deliver this product reliably across the UK. Rarely beaten on price, National Flues always provides secure online payments.
The DM54 starter flue block is designed to initiate and maintain an efficient and safe flue system for various heating appliances, ensuring optimal performance and reduced risks.
National Flues is a leading supplier of fireplaces and flues across the UK, known for competitive pricing, reliable delivery, and secure online payments. We cater to both retail and trade customers, providing high-quality products and exceptional service.
