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Ductwork Sizing for VAV Box System
I guess that’s the issue I’m having, I’m still relatively new and I was told size all supply for 0.1” friction or 2000 fpm and to tap the main and the next highest even duct size as the vav box and transition to vav inlet 3 equivalent diameters before the inlet for a vav box. So I’ve been...- rlafrance
- Post #3
- Forum: HVAC/R engineering
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Ductwork Sizing for VAV Box System
I’m working on a VAV system and I had a question on how to reduce pressure drop on my taps to the VAV terminal units. Generally the inlet of the VAV boxes have a high velocity, but, if I’m sizing my main for 0.1 in wg friction that’s relatively low velocity so there’s a huge pressure drop of...- rlafrance
- Thread
- Replies: 4
- Forum: HVAC/R engineering
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Vestibule Pressurization
I’m fairly new to HVAC design and I have been told I need some air in my vestibules by the project engineer. I was always under the impression that the vestibules are unconditioned or possibly have a unit heater. Obviously you can’t condition the space fully because of the doors but is the goal...- rlafrance
- Thread
- Replies: 0
- Forum: HVAC/R engineering
