If you really want to DIY it; go to your local Home Depot or Lowes, get a toilet exhaust fan and mount it close to your laser engraver. Then some 4" dryer exhaust duct and go to a dryer wall louver with a backdraft damper.
We really need more information to give sound advice here. Fan manufacturer and model number for starters.
That fan will be overkill. It is designed to deliver 900-1200 CFM of air when you need maybe 200-300 CFM.
It sounds like and I"m assuming here, that your gooseneck roof vents have are...
This just came across my feed in YouTube yesterday.
Introducing REGEX Excel Functions
Leila has LOTS of videos on how to use Excel and does an excellent job of explaining how to do all manner of stuff in Excel.
My experience has been that VRV's tend to be more energy efficient.
That said, they aren't without other problems and complications.
For one, they still need an DOAS unit and duct for ventilation air.
Depending on your locale, the size of the system can have limits set on the amount of...
Noise is not an issue for pipe containing condensate water, there is not enough water to generate a lot of noise. (That argument makes sense for an internal roof drain where you get lots of water in a large pipe and the mass of cast-iron helps to dampen the sound.)
The only reason you want...
Have to agree with HVAC-Notice, that learning how to use a software package like HAP or Trace is not the same as learning heat load calculations.
You need to have a fundamental knowledge of how to calculate heating/cooling loads before you dig into learning the software.
There are a number...
check your inputs. Did you manually input the people sensible/latent loads or select the type of use (office work)?
Is this zone a single room (open office space) or does it consist of multiple individual offices?
If multiple offices, how are they arranged? Any on south side of building with...
It is going to depend on the material of the condensate pipe. If you are using copper tube or another metal, having insulation would probably be a good idea. If you are using PVC, insulation is not needed as much.
Are there any codes you need to abide by that mandate insulation?
ACs and Heat Pumps both use the vapor compression refrigeration cycle to move heat from one space to another with direction of flow being the main difference. ACs move heat from the inside of a building to the outside (thus cooling the inside), whereas HPs move heat from outside to inside a...
That is getting to be borderline needing floor mounted CRAC unit. From my experience, I'd say you're looking at closer to 10+ tons.
Depending on how critical the servers are, having n+1 redundancy (minimum 2 CRAC units) may be needed, talk with users to confirm.
What kind of flooring is there...
It is really hard to say without additional information. One of my first questions is how large is large?
What exactly are you calling "Fan Coil Unit"? When I hear FCU I think a split Dx or chilled water unit with a maximum capacity around 15 - 20 tons and can fit in closet. Often comes as...
Use caution when using ceiling mounted cassette, especially in the small closet sized server rooms. Despite Ductless split systems being bad about removing humidity and these rooms not having a lot of humidity to be removed, you can generate some condensate still. You do not want that over the...
You are better off asking the writer of that specification directly.
I would interpret as limiting the structural support members to be no more than 4'-0" o.c. (on center)
I can't think of any code requirement for providing a diffuser. However, diffusers improve air distribution and help ensure air gets where you need it versus just creating a pocket of cool air.
Depending on who your occupants are, select groups of people tend to be mischievous. Diffusers can...
