firts of all you have to know I'm a newbie first class in HVAC. so please be gently in your reply to what you might think: "that is a stupid question"
An installation where humidity, temperature and pressure in a room are very delicate some VAV' are installed to remain the demanded pressure.
to ensure the demands are met a DPT is installed over the VAV's. after a VAV are 2 filters.
I understand that, to know if your filter is dirty, you install a DPT.
Is that always done? if you have 2 filters, you install 2 DPT's? or is that just too much?
will one DPT do the job and you just replace both filters at the same time?
thanks in advance for your answer.