Hello, I wanted to get an opinion from everyone please. I have a warehouse that will be supplied with 48,000 CFM through evaporative coolers and it shares a wall (and doors) with a server room so it's important that it's not pushing all of that damp air into the server room. My first thought was to install a couple of large fans controlled by space pressure but I was thinking about saving money by installing pressure-actuated dampers on the walls and then have a smaller fan. I'm just brainstorming at this point so any critique or other ideas you have would be appreciated.
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Pressure Relief for Warehouse?
- Thread starter nuuvox000
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This 48,000 CFM is all outside air that you are bringing in? If not, then there is nothing to push the air into the server room. In other words, the warehouse will not be positively pressurized in relation to the server room. Vapor pressure is another issue. Do you have any vapor barrier between the spaces?
Server room or not, 48,000 CFM is a lot of air to supply into a building and hope it relieves itself without help - unless you have a massive building with a lot of openings to outside.
The damper method works fine, just have to size the dampers so the pressure to push 48,000 through them isnt high enough to create difficulty with the doors. The fan method also works.
As for the server room, if it’s completely internal to the warehouse your 48,000 CFM is going to just blow through there without a reason (like if it had an exterior wall or if the room has exhaust). But due to likely differences in humidity the moisture will migrate in if your evap cooler is putting out high humidity air.
The damper method works fine, just have to size the dampers so the pressure to push 48,000 through them isnt high enough to create difficulty with the doors. The fan method also works.
As for the server room, if it’s completely internal to the warehouse your 48,000 CFM is going to just blow through there without a reason (like if it had an exterior wall or if the room has exhaust). But due to likely differences in humidity the moisture will migrate in if your evap cooler is putting out high humidity air.
J.J.Newcomb
Mechanical
Whatever you do, the doors to the server room (and the walls!) need to seal really well. As BronYrAur says, vapor pressure is an issue. You may need to put vestibules on the doors into the server room. Typical server room cooling systems are not designed to handle much moisture (latent) load, so leaks into the server room will be a big issue.
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