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Post by oblertone on Jul 27, 2020 12:59:48 GMT
A lot of WFO builder use twin-wall insulated flue which is readily available in 1m lengths which is about all you'll need. All of these systems can be supplied with a 'Register Plate' which you attach to your entry arch (bolt, screw, cement) and the twin-wall attaches to this , normally by a twist mechanism. Have a look on eBay for used stuff as new is not cheap.
My build (link below) uses this as I dismount the flue for ease of storage.
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