Dear Una,
Here are some comments from factory.
The blower location doesn't matter whether the hood is EP or not. It matters more because of the duct run. Here is a short description of the positives and negatives of a built-in blower to clarify:
A remote blower is a failsafe, meaning if there is a leak in the duct work at any point, the duct is under negative pressure, so clean air will be pulled through that leak. A fume hood with an integral blower puts the duct work under positive pressure and therefore if a leak develops, the contaminated air will be pushed out of the duct at the location of the leak.
The fume hood with an integral blower is not a "one size fits all" - the mechanical system has to fit the integral blower, whereas a fume hood with a remote blower has a blower sized to fit a specific mechanical system.
There may be some noise issues with a fume hood with an integral blower due to the blower being right on top of the fume hood. For this reason, I have had teachers and professors tell me they avoid this type of set up in their room because they need to be able to teach and hear their students while the fume hood is on.
The applications that would fit an integral blower are ones that have very short duct runs. Mobile labs are very good applications for fume hoods with integral blowers.
If you can go with remote, that is always recommended.
We can provide the gooseneck cold water fixture (9827900 shown below). As far as a salt water fixture, there is no standard fixture for that, so find out what materials they need for that fixture. Do they need plastic? Or stainless steel? Or something else?