yea get a window ac or some sorts of ac . window ac way better then a portable unless you spend 500 or 600 on a portable . but for . 4 000 watts if they are air cooled I suggest a 10000 btu window unit in that room . if your getting a portable then you need 2 units .
Nope, sorry Bryan. Window rattlers will not work in colder climates in the winter. They exchange air until the intake air is colder then the set temp.
If your smart and spend that big dollar on a server room AC. They do not intake from another area or use a hose to intake from. They only exhaust hot air out a hose.
Regular 2 hose intake and exhaust portables, will work also. Just don't intake from outside!
You should have a filtered intake when using either one.
You can set up a temp controlled relay system, that works by turning on a circuit - connected to a small fan, that pulls filtered outside air in for cooling in the winter! That's how I run mine! Save's plenty over running a cpl of portables!