125mm B-Vent

Twin wall gas heating system designed for cost-effective venting of residential and small commercial atmospheric gas appliances with input up to 60kw. It is suitable for both internal and external use, either as a complete system or in combination with masonry, i.e. brick chimneys.
Note that BS 5440-1 requires the use of a stainless steel insulated flue on external runs exceeding 3 metres.

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