Down draught on Chimney

11 Oct 2009
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United Kingdom
Hi guys

Got a good customer who's having major problems with their open fire. They bought the house about 3 years, LARGE LARGE house, and the chimneys had anti-down draught cowls on each pot (2 chimneys, 1 pot each) first chimney is gas flue (no problems) 2nd open fire - room fills with smoke.

I poked the chimney down to check for any blockages, they had the chimney swept and didn't help. We installed a FlueCube cowl (£400) cowl that's supposed to guarantee performance, didn't help. 2nd option was then a spinning cowl and now only works if the wind is coming from the east.

They have now asked me to install an electric Extraction Fan (£1,000+) but after looking into things, and measuring etc, the chimney breast is about 1.5 / 2m BELOW the ridge line, and I'm thinking the wind is just swirling around this and blowing down the pot.

Has anyone used a Electric van? exodraft&PN=Vortice_Tiracamino.html#SID=209

or would it be better to build the chimney above ridge level?

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