Firechests - 950 Magnum Firechest with Damper
At a Glance
- - Premium construction using natural pumice for superior insulation
- - Designed for 350mm internal flue diameter systems – liners and DM systems
- - Allows expansive fire openings up to 1.2 meters wide
- - HETAS approved and CE marked for safety and reliability
- - Flat pack design ensures easy transportation and assembly

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 950 Magnum Firechest with Damper is part of our premium Isokern range, designed for efficient and safe heating solutions. This firechest, supplied as a convenient flat pack, is easily constructed to form a precise and preformed fire opening ready for your personalised finishing. The Magnum variant allows you to create expansive fire openings up to 1.2 meters wide.
Made from pumice, a natural insulator, this firechest offers superior thermal efficiency. The insulating properties of pumice help your chimney flue gases reach optimal temperatures quickly, enhancing the performance of your heating appliance shortly after ignition. This feature also ensures the chimney remains warmer for longer periods, reducing the chances of condensation and soot build-up.
Endorsed by HETAS and CE marked, the Isokern Double Module (DM) System Chimney is a reliable choice for any home.
SKU: 59-129371
Technical Specifications | |
---|---|
SKU | 59-129371 |
Item | 950 Magnum Firechest with Damper |
DM System Designation | EN1858 - T450 N1 D 3 G(00) |
Liner System Designation | EN1857 - T600 N2 D 3 G |
Warranty | 10 Years |
Material | Pumice |
Distance To Combustibles | 0 on straights; 38mm on offsets on DM System |
Internal Flue Diameter | 350mm |
Max Fire Opening Width | Up to 1.2 meters |
Package Type | Flat Pack |
Certification | HETAS approved, CE marked |
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 950 Magnum Firechest with Damper is a top-tier choice for creating impressive fire openings. Its unique pumice construction ensures excellent performance and insulation. Rarely beaten on price, National Flues is proud to offer reliable delivery across the UK to both retail and trade customers.
The 950 Magnum Firechest with Damper is designed for creating large, efficient, and aesthetically pleasing fire openings in domestic and commercial settings.
Isokern by Schiedel is renowned for its premium range of chimney and heating solutions, leveraging the unique properties of pumice to deliver superior insulation and performance.
