DM54 - 300mm ID x 300mm high flue block
At a Glance
- - Premium 300mm ID x 300mm high flue block from the Isokern DM range
- - Crafted from natural pumice for superior thermal insulation
- - Dual-wall design supports thermal movement and minimises cracking
- - HETAS approved and CE marked for assured safety and quality
- - Versatile compatibility with stoves, inserts, open fires, and cookers burning wood, oil, and gas
- - Quick and straightforward assembly for time-efficient installation

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 300mm ID x 300mm high flue block, part of our premium Isokern DM range, is a top-of-the-line System Chimney designed with durability and performance in mind. Crafted from natural pumice, this dual-module system ensures optimal flue gas temperatures while mitigating exterior heat transfer. Its double wall construction effectively supports thermal movement, reducing cracking and leakage.
Ideal for stoves, inserts, open fires, and various cookers burning wood, solid fuel, oil, and gas (excluding condensing appliances). With rapid and straightforward assembly, it's a builder's favorite. The DM54 is available in three sizes for tailored installation: DM36, DM44, and DM54.
Trust in its HETAS approval and CE marking for safe, high-performance operation. Experience the superior insulating properties of pumice, ensuring quick heating and long-lasting warmth while minimising condensation and soot build-up.
SKU: 59-129033
Technical Specifications | |
---|---|
Model | DM54 |
Internal Diameter | 300mm |
Height | 300mm |
Material | Natural Pumice |
Construction | Double Wall |
Certifications | HETAS approved, CE marked |
Warranty | 10 Years |
Suitable For | Stoves, inserts, open fires, cookers (excluding condensing appliances) |
System Compatibility | Available in DM36, DM44, and DM54 sizes |
Installation Clearance | 0mm on straights; 38mm on offsets in 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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The DM54 - 300mm ID x 300mm high flue block stands out for quality and reliability. Perfect for various heating appliances and built to last. With our unbeatable prices and dependable delivery nationwide, it's an excellent choice for both retail and trade customers.
The DM54 flue block is designed to efficiently channel flue gases from various heating appliances, ensuring safe and optimal performance.
National Flues is a leading supplier of high-quality fireplaces and flues across the UK, known for our unbeatable prices and reliable nationwide delivery. We proudly serve both retail and trade customers with top-notch products and services.
