I am doing a ductwork pressure drop through Netsys. I have manually fixed the ALL duct sizes but the software appears to be selecting new ones in a number of instances. How can I stop this from happening?
Many Thanks
Craig
Hi Craig - is it possible that you've fixed the riser part of section 26 to 600x300? or the neck size of the inlet is fixed. Both of these could be overriding your fix.Regards,
Duncan Brown
I did have fixed neck sizes in place which I have now un-ticked in all instances just in case but I don't think that has helped.
I have no risers as such, I am using wall mounted grilles at the same height as the system.
I think the problem may be related to duct size changes in the same section. For instance, where I have a 1400 x 200 transforming to 900 x 400, the whole section becomes 900 x 200 in the calculation. Is there a correct way of adding a reducer that I'm not using? I was considering "bodging" this by added a short branch with limited volume but hope there's a better solution!
Craig - yes - that could also cause problems, as the pipes 'heal' to one section but have different dimensions on each part.If you try the following, it shouldn't have too much impact on the end results.You can click the image to make it larger
Answer Verified By: Craig Sawyer
That's perfect. Problem solved!
Thanks Duncan