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Top-Quality Flue Boxes for Your Cozy Fireplace in the UK - Buy Now!

Flue boxes are essential components for a functional fireplace setup, ensuring proper ventilation and safe exhaust management. At MI-Flex, Gas FLEX Fixings, we offer top-of-the-line 125mm (5 inch) flue boxes designed for optimal performance and durability. Our flue boxes are crafted using premium materials and precision engineering to guarantee long-lasting reliability and efficient functionality, making them a must-have for any fireplace installation in the UK.

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The best selling flue liner in the UK. Suitable for gas, oil, and approved solid fuels. Call our advisers on 01670 206 999 if you need any help choosing.

£81.99

8-FGC-SF

125mm (5 inch) Flue Gas Collector   Flue Box

125mm (5 inch) Flue Gas Collector Flue Box

OUT OF STOCK

£131.49

8-RFB

125mm (5 inch) Recessed Flue Box  Flue Box

125mm (5 inch) Recessed Flue Box Flue Box

OUT OF STOCK

Your Flue Boxes Questions Answered

What are flue boxes? -

Flue boxes are specially designed components that connect the flue pipe to the chimney, facilitating the safe discharge of combustion byproducts from your fireplace.

Why are flue boxes important for fireplace safety? +

How do I know which flue box size is right for my fireplace? +

Can I install a flue box myself? +

Are MI-Flex flue boxes compatible with all chimney types? +

How often should flue boxes be inspected and maintained? +

What materials are MI-Flex flue boxes made of? +

Can flue boxes improve the efficiency of my fireplace? +

Flue boxes play a crucial role in maintaining the safety and performance of your fireplace system. Our 125mm (5 inch) flue boxes are specifically engineered to fit seamlessly into your flue system, providing a secure connection between the flue pipe and the chimney. With a focus on quality and durability, our flue boxes are built to withstand high temperatures and harsh weather conditions, ensuring consistent performance year after year. Whether you're renovating an existing fireplace or installing a new one, our flue boxes are the perfect choice for UK homeowners looking for reliable ventilation solutions.
Why Buy Flue Boxes Products
Flue boxes are indispensable for facilitating proper airflow and exhaust dispersion in your fireplace setup. By installing a high-quality flue box, you can ensure that harmful gases are safely vented outside your home, promoting indoor air quality and reducing the risk of carbon monoxide buildup. Additionally, flue boxes help maintain the efficiency of your fireplace by optimizing combustion and reducing heat loss. Whether you have a traditional open fireplace or a modern wood-burning stove, flue boxes are essential components that contribute to the overall performance and safety of your heating system in the UK.

Trusted By Trade Professionals

Our Flue Boxes products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support when you buy Flue Boxes from National Flues. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.

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