How would I determine the dew point of a server room
-
Spin a can of dew on the floor and mark where the top points to
-
Hitting the dew point in a normal house is uncommon. A server room should be dryer and warmer than a normal home. Not a lot dryer, but a little. But it should be "dry" by normal living standards. Say 65%. And it should be warm, by normal standards, like 75F or higher. If dew point gets anywhere close, you have other problems already.
-
@MattSpeller So not working in weather often, can you explain the site to me a bit. I understand the sliders, but this just doesn't make any sense to me.
-
Dew point is not a useful thing for a server room because the equipment that you care about, the servers, are being cooled not warmed. They are warmer than the air, not cooler than it, so dew point is never of concern. Dew would only form on things that are colder than the air.
-
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller So not working in weather often, can you explain the site to me a bit. I understand the sliders, but this just doesn't make any sense to me.
So, you know two data points (or can look them up)
Temperature of server room
Humidity of server room (usually the same as outdoors but can vary widely - use worst case)
plug those into the website, it'll solve for dew point and cough you out a number.
As SAM is no doubt typing out already it's not a super useful thing to know but it can be CRITICAL in places like the everglades where you get super high humidity.
For a real life scenario it's most useful to consider it if your gear is ever powered off for a while (week?)
-
@scottalanmiller said in How would I determine the dew point of a server room:
Dew point is not a useful thing for a server room because the equipment that you care about, the servers, are being cooled not warmed. They are warmer than the air, not cooler than it, so dew point is never of concern. Dew would only form on things that are colder than the air.
The higher of the two rooms isn't cooled at all, just a passive air vent to "pull air out" but it's not connected to anything..
-
@MattSpeller said in How would I determine the dew point of a server room:
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller So not working in weather often, can you explain the site to me a bit. I understand the sliders, but this just doesn't make any sense to me.
So, you know two data points (or can look them up)
Temperature of server room
Humidity of server room (usually the same as outdoors but can vary widely - use worst case)
plug those into the website, it'll solve for dew point and cough you out a number.
As SAM is no doubt typing out already it's not a super useful thing to know but it can be CRITICAL in places like the everglades where you get super high humidity.
For a real life scenario it's most useful to consider it if your gear is ever powered off for a while (week?)
So dewpoint alerts are probably pretty worthless for us, you're thinking?
-
@MattSpeller said in How would I determine the dew point of a server room:
For a real life scenario it's most useful to consider it if your gear is ever powered off for a while (week?)
... while not being stored in the server room.
-
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller said in How would I determine the dew point of a server room:
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller So not working in weather often, can you explain the site to me a bit. I understand the sliders, but this just doesn't make any sense to me.
So, you know two data points (or can look them up)
Temperature of server room
Humidity of server room (usually the same as outdoors but can vary widely - use worst case)
plug those into the website, it'll solve for dew point and cough you out a number.
As SAM is no doubt typing out already it's not a super useful thing to know but it can be CRITICAL in places like the everglades where you get super high humidity.
For a real life scenario it's most useful to consider it if your gear is ever powered off for a while (week?)
So dewpoint alerts are probably pretty worthless for us, you're thinking?
Not so useful, no. That's why we never talk about them in datacenters
-
@DustinB3403 said in How would I determine the dew point of a server room:
@scottalanmiller said in How would I determine the dew point of a server room:
Dew point is not a useful thing for a server room because the equipment that you care about, the servers, are being cooled not warmed. They are warmer than the air, not cooler than it, so dew point is never of concern. Dew would only form on things that are colder than the air.
The higher of the two rooms isn't cooled at all, just a passive air vent to "pull air out" but it's not connected to anything..
So the servers are always warmer than the air.
-
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller said in How would I determine the dew point of a server room:
@DustinB3403 said in How would I determine the dew point of a server room:
@MattSpeller So not working in weather often, can you explain the site to me a bit. I understand the sliders, but this just doesn't make any sense to me.
So, you know two data points (or can look them up)
Temperature of server room
Humidity of server room (usually the same as outdoors but can vary widely - use worst case)
plug those into the website, it'll solve for dew point and cough you out a number.
As SAM is no doubt typing out already it's not a super useful thing to know but it can be CRITICAL in places like the everglades where you get super high humidity.
For a real life scenario it's most useful to consider it if your gear is ever powered off for a while (week?)
So dewpoint alerts are probably pretty worthless for us, you're thinking?
Suffice to say you'd be having other things to worry about before DP became an issue.
Like getting power back to your building
