Firechests - 1100 Magnum Firechest With Damper
At a Glance
- Crafted from natural pumice for superior insulation
- Designed for 350mm internal flue diameter liners and DM systems
- Creates fire openings up to 1.2 metres wide
- Easy-to-assemble flat pack design
- HETAS approved and CE marked for safety and reliability

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 Isokern 1100 Magnum Firechest With Damper is a high-quality solution for creating expansive fire openings, measuring up to 1.2m wide. Supplied as an easy-to-assemble flat pack, the firechest is perfect for a seamless finish. Made from natural pumice, it offers superior insulation - ensuring chimney gases reach optimal temperature quickly, improving appliance performance right from the start.
This also helps maintain a warmer chimney for longer, which minimises condensation and soot build-up, contributing to overall efficiency. The Isokern DM is both HETAS approved and CE marked, making it a reliable choice for any home.
SKU: 59-129568
Technical Specifications | |
---|---|
SKU | 59-129568 |
Product Name | Firechests - 1100 Magnum Firechest With Damper |
Material | Natural Pumice |
Flue Diameter | 350mm (internal) |
Fire Opening Width | Up to 1.2 metres |
Damper | Integrated for airflow regulation |
Warranty | 10 Years |
Approvals | HETAS approved, CE marked |
Assembly | Easy-to-assemble flat pack |
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 1100 Magnum Firechest With Damper represents top-of-the-line quality from Isokern, perfect for both retail and trade customers. With our reliable nationwide delivery and competitive prices, you can trust National Flues for all your fireplace and flue needs.
The 1100 Magnum Firechest With Damper is designed to create large, efficient fire openings in residential and commercial properties, enhancing the performance and longevity of your heating appliance.
Isokern is renowned for its high-quality chimney and fireplace solutions, utilising natural pumice to deliver superior insulation and performance. Their products are both HETAS approved and CE marked, ensuring reliability and safety.
