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Non-concentric increaser 3 diameters - Ø 350 (3-350-204)

National Flues presents the Non-Concentric Increaser – Ø350, a premium solution for commercial and residential flue systems. This advanced, CE marked component enhances chimney efficiency and is perfectly suited for both condensing and non-condensing applications. Ideal for installation in high and low temperature environments, this increaser is a testament to quality and innovation in the world of flue technology.
£682.23
with free delivery Give us a call if you find it cheaper and we'll try to price match.

 

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At a Glance

    Constructed from high-grade 316L stainless steel
    CE marked and compliant with EN 1856-1 standards
    Seamless non-concentric design to increase three flue diameters
    Push-fit jointing system for easy installation
    Suitable for both high and low temperature applications
    Reliable sealing gasket for both positive and negative pressure systems
    Prevents condensate pooling in inclined flue runs

Please Note: All dimensions refer to the internal diameter of flues. If unsure, please call 01670 206999 to ensure you choose the correct products.

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The Non-Concentric Increaser 3 Diameters - ⌀ 350 is part of the advanced SWPro modular single wall flue system. Constructed from 316L grade stainless steel, this increaser is designed to be versatile, accommodating both high and low temperature applications in condensing and non-condensing environments. Its high-pressure sealing gasket ensures reliability under positive and negative pressure conditions.

The increaser is ideal for a variety of uses, including boilers, ovens, ventilation systems, and as a chimney shaft liner. With its CE marking and compliance with EN 1856-1 standards, this component guarantees safety and performance. Easy to install with a push-fit jointing system, the SWPro series provides ultimate convenience, requiring only a 50mm distance from any combustible materials.

SKU: 3-350-204

Technical Specifications
Diameteru00d8350
Construction316L Stainless Steel
StandardsCE, EN 1856-1
SystemSWPro Modular Single Wall Flue System
Warranty10 Years
FuelsGas, Oil
PressureSuitable for Positive and Negative Pressure Systems
ClearanceMinimum 50mm from Combustible Materials
The Non-Concentric Increaser is installed using a straightforward push-fit jointing system. Ensure all components are clean and free from debris before assembly. For P1 and H1 installations, use the recommended jointing gaskets to secure the system. Always maintain at least a 50mm clearance from any combustible materials. After installation, check that all connections are secure and perform a thorough inspection to confirm that there are no obstructions or leaks. Regular maintenance checks are advised to ensure ongoing performance and safety.

The Non-Concentric Increaser is made from high-grade 316L stainless steel, ensuring durability and resistance to high temperatures and corrosion.

Yes, the Non-Concentric Increaser is CE marked and conforms to EN 1856-1 standards, ensuring safety and performance under various conditions.

The primary application of the Non-Concentric Increaser is to increase the system diameter in a flue setup, especially beneficial in inclined installations to prevent condensate pooling.

Yes, it is suitable for both high and low temperature applications, accommodating both condensing and non-condensing setups.

Installation is straightforward with a push-fit jointing system secured by a locking band, ensuring a tight and reliable fit. Jointing gaskets are required in P1 and H1 installations.

A minimum clearance of 50mm is required from any combustible materials such as wood or plasterboard.

Yes, the Non-Concentric Increaser is designed to function efficiently with both positive and negative pressure systems.
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Monday, May 12th. Delivery times of products not in our warehouses depend on product availability and shipping. If you need a definitive delivery time give us a call. If you need faster stove or fireplace delivery please also give us a call. We can sometimes 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 on a retail basis. Give us a call if you find it cheaper and want to buy from us.

Read our review in our Non-concentric increaser 3 diameters - Ø 350 buyers guide

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