How do I fix a bend type on the top of a vertical rising duct and the bottom on the same floor. If I fix using fix bend/Tee command It will only let me fix one. Do I have to try and simulate this in a different way to get the outcome.
Isometric view example
Fixing view example
krogerfeedback Great article. Very well explained. Thanks for the share.
Hi Dan, I see what you mean. It looks like these two options are the only methods that would give you what you need. Adding the additional floor (while inconvenient I'm sure) is a good idea to get around this if you have a very large system. Alternatively it might be easier to just add a slight slope to the riser, so the bends are not on top of one another. This should let you select each bend while still giving accurate pressure results.
Shane Regan | Principle Building Performance Support Engineer
Answer Verified By: Dan Frost
Sorry my mistake I meant to say one I would use a multi vane top Long radius bottom & the other riser would be short radius short radius.
I am drawing ductwork just to clarify (not sure if that makes a difference or not). The problem with that is it changes the rest of my default bends to the same which I suppose I could manually fix the rest to the previous default. In a larger system I don't always use the same bend type in all rises for example I can use a long radius bend at the top and a short at the bottom on one duct rise and a short radius and short radius for another. I was just wondering how I would simulate this best using Hevacomp. I was thinking maybe I could add another identical floor between the rise that way I could select both. However, I wondered if it were possible to do this on the same floor.
Hi Dan, you could change your default bend type, prior to tracing the pipework, by going to Fittings > Default Bends/Tees. You can change it back afterwards if needs be.