Stalin Posted June 29, 2020 Report Share Posted June 29, 2020 What is happening? For approximately the same length of ducts, Pressure FTP is so different. Quote Link to comment Share on other sites More sharing options...
Martin Griffith Posted June 29, 2020 Report Share Posted June 29, 2020 It's hard to tell without seeing the model. Send us an email with the model to ventsim.support@howden.com and we can take a look. Quote Link to comment Share on other sites More sharing options...
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