Midtherm Flue Systems Ltd


App. Type: Factory Made Metal Chimneys
Certificate Ref: C-C030-2022
Std. Tested to: EN 1856-1:2009 & EN 1443:2003
Flue Sizes: 100, 130, 150, 180, 200, 250, 300, 350mm
Manufacturer Address: Midtherm Flue Systems Ltd, New Road Netherton, Dudley, West Midlands, DY2 8SY
Manufacturer Email: [email protected]
Telephone Number: 01384 458800


HETAS has audited and verified that all applicable clauses in the test report have been passed in respect of the materials, design, and construction in accordance with the relevant BS EN type test standard for the appropriate technology, performance criteria of which is below;

Temperature Level T450
Pressure Level N1
Condensate Resistance D
Corrosion Resistance Vm
Flue Liner Material Specification L50050
Sootfire Resistance (G:yes or O:no) and distance to combustible material (in mm) Flue sizes 100-300mm = G50, 350mm = G75


The product certified has been assessed for its suitability for installation in domestic properties against the requirements of the Building Regulations and appropriate standards. The performance of the appliance has been verified as meeting the following technical performance attributes;

Combustible Clearances 100-300mm = 50mm, 350mm = 75 mm
Firestop BS476-20 No. 128942 + Supplement from Warrington Fire Research
CE Mark Certificate > 2797-CPD-566560

*HETAS product approval is not valid for appliances fitted with an external air supply ducted directly to the appliance. The installer should reference HETAS technical note TN_0020 General Guidance for the Installation, Risk Assessment & Commissioning of Solid Fuel Appliances with a Dedicated External Air Supply for more information.

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