I am not sure what it is about fresh air intake for exhaust ventilation systems, but we should call them “Rodney”, as in Rodney Dangerfield, because they get no respect. As I said in 2016 and 2018 in my articles:
- The Ventilation Design Basis begins with our intakes
- FRESH AIR intakes for a ventilation system need to be from a source of FRESH AIR!
Here are two (2) photos of a person bragging on their NH3 refrigeration start-up. Besides the fact that the process does not appear to have completed its PSSR, take a look at the piping work and its location and proximity to the fresh air intake…