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300MM (12 INCH) Flue Liners for Efficient Heating | Buy Online - National Flues

Upgrade your fireplace with our premium 300mm (12 inch) flue liners from National Flues. Designed to enhance heating efficiency, these liners are ideal for various applications. Our category offers a range of products including MI-Flex and 904L Mi-FLEX, along with essential accessories like bottom fixings, top fixings, terminals, insulation, and register plates.

 

MI-FlexMI-Flex
Chimney FlueChimney Flue
Connecting PipesConnecting Pipes
Fans Flashings CowlsFans Flashings Cowls
Installation PartsInstallation Parts
After Care PartsAfter Care Parts
StovesStoves
FireplacesFireplaces
Flue Liner
Flue Liner
Bottom Fixings
Bottom Fixings
Top Fixings
Top Fixings
Terminals
Terminals
Accessories
Accessories
Insulation
Insulation
Register Plates
Register Plates
Jubilee Clip and Banding Ø 200 - 800mm length
SKU: 13-JUBILEE-200

Jubilee Clip and Banding Ø 200 - 800mm length

£3.99 incl VAT

Jubilee Clip and Banding Ø 300 - 1000mm length
SKU: 13-JUBILEE-300

Jubilee Clip and Banding Ø 300 - 1000mm length

£4.49 incl VAT

Top Clamp - Ø 300
SKU: 20-300-C

Top Clamp - Ø 300

£14.99 incl VAT

Gather Hood (400x300) - Ø 300
SKU: 20-300-GHL

Gather Hood (400x300) - Ø 300

£145.99 incl VAT

MI-FLEX Adaptor - Ø 300
SKU: 20-300-MAE

MI-FLEX Adaptor - Ø 300

£35.49 incl VAT

Nose Cone - Ø 300
SKU: 20-300-NC

Nose Cone - Ø 300

£102.99 incl VAT

Top Plate - Ø 300
SKU: 20-300-P

Top Plate - Ø 300

£14.99 incl VAT

Chimney Notice Plate
SKU: 20-CNP

Chimney Notice Plate

£1.99 incl VAT

Chimney Notice Plate - 50 Pack
SKU: 20-CNP48

Chimney Notice Plate - 50 Pack

£87.49 incl VAT

904L Mi-FLEX 300mm x 1m CUT LENGTH
SKU: 36Z-300-1

904L Mi-FLEX 300mm x 1m CUT LENGTH

£347.49 incl VAT

Leca 50L Bag
SKU: 90-LECA

Leca 50L Bag

£26.99 incl VAT

Vermiculite (100L Bag)
SKU: 90-VERM

Vermiculite (100L Bag)

£33.99 incl VAT

Register Plate (H) - 900x600, no access holes
SKU: 94-REG-H

Register Plate (H) - 900x600, no access holes

£49.99 incl VAT

Joiner - Ø 300
SKU: 20-300-J

Joiner - Ø 300

OUT OF STOCK

£95.99 incl VAT

Your Questions Answered

What is the benefit of using a 300mm (12 inch) flue liner? -

A 300mm (12 inch) flue liner provides enhanced safety by effectively venting combustion gases and preventing heat transfer to surrounding combustible materials. It also helps maintain proper draft and improves the overall efficiency of your fireplace.

Are 300mm (12 inch) flue liners suitable for all types of heating systems? +

How do I know what length of 300mm (12 inch) flue liner I need? +

Can I install a 300mm (12 inch) flue liner myself? +

Do I need any additional accessories when installing a 300mm (12 inch) flue liner? +

Are 300mm (12 inch) flue liners durable and long-lasting? +

Can I use a 300mm (12 inch) flue liner with a wood-burning stove? +

When it comes to ensuring optimal performance and safety for your fireplace, investing in a high-quality flue liner is crucial. At National Flues, our 300mm (12 inch) flue liners are constructed to the highest standards to deliver superior durability and reliability. Whether you are looking to retrofit an existing system or install a new one, our flue liners provide excellent protection against heat and corrosion, contributing to a longer lifespan for your fireplace. With a focus on easy installation and maintenance, our products are designed to meet the needs of both homeowners and professionals.
Why Buy These Products
Our 300mm (12 inch) flue liners are versatile and suitable for a range of heating applications. From residential wood-burning stoves to commercial furnaces, our liners offer exceptional performance and safety. By ensuring efficient venting of combustion gases, these liners help improve the overall heating efficiency of your fireplace. Additionally, our products are compatible with various fuel types, making them a practical choice for different heating systems. Whether you are aiming to enhance heating performance, comply with regulations, or simply improve the aesthetics of your fireplace, our 300mm (12 inch) flue liners are the perfect solution.

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Our 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.

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