That is interesting dbill. I had not realized that some jurisdictions had that restriction. So do you just daylight your condensate, or do you put in floor drains and pipe to storm?
I will say this about PCM. They must make some money, somehow... they have an ad in every edition of the ASHRAE Journal... I haven't used it, but I guess someone must be.
Alright, here is a fun one. Had a client say they need some help redesigning their storm water system. They had recently been flagged by the city for putting too much storm water in their sanitary sewer system. In my head I snickered, because I feel like the term "too much" and "any at all" are...
Your pressure should fluctuate quite a bit. Since your distributor is working for a temp it will be changing the pressure based on the temperatures. I don't think you will find a good number...
You don't have to hire a local engineer. There are lots of engineers that work in multiple states. Find a bigger firm, google MEP engineers or MEP consultants. As said before these should be stamped drawing submitted to an AHJ for review. Otherwise you are breaking the law [sadeyes]
You should put in a transfer from an adjacent space with a fire/smoke damper in the opening. That way you don't pull in unconditioned air into your room.
You want to do as Pedarrin suggested. You want your gpm's, decide how many fixtures could run at once, and your inlet water temperature. There is no better way to do it really. Newer, more expensive models are better at flow diversity than older models, but you can easily ruin/shorten the life...
ZDR, I agree with what you said, but I will say many people refer to ACH in a general term as air being supplied to a space. So I have had people tell me they need 1 ACH of fresh air and 6 ACH in the building. What they actually asking for is a unit that will supply air equivalent to 6 ACH with...
You don't have to follow energy code if the building is a process, and given the site, the AHJ is the owner so they get to allow whatever they want.
We wanted to separate them out, but there is not space on the site to grow the building, or add new buildings. It is very tight.
Building needs to be at 77 because there are large battery racks in the space. 77 is the preferred temp by battery manufacturers. Above that they de-rate them.
You are correct. There is no humidity source in the building. The concern during the winter was if it is 60 degrees outside, and then goes to 30 degrees in a couple hours, would my interior dew point keep up with outside air dew point.
