Hello again, I will answer your most recent post in context... my remarks in [[....]]
My background: I'm a network engineer and a technical writer. You will **NOT** drown me with specifications/details/etc. You will turn me off with overly-general statements... unless you legitimately have had "...20 years of good experience with brand x..." okay.
[[ I have NO experience with the brand of portable you might want to buy, maybe a month at most depending on the brand]] [[I do have 51 years experience on larger systems including large scale cray computer rooms, into the 20 to 250 million dollar range, its on my verified resume posted on JA you can access it...
My first 30 years as a mechanical electrical contractor with a crew of 27 ending in Los Angeles, the last 20 years consulting nationally for fortune 500 companies such as IBM, US Dept of Energy Nuclear weapons, Boeing military air craft and a dozen others. ]]
[[ The physics and math however remain the same, in this case largely because the portables exhaust air from the room (causing outside air to be sucked in) that is a problem in all cases and an insurmountable problem in high humidity areas, in those cases only 5% outside air is allowed. There are countless exceptions, none relevant here however.]]
The server has dual 920w power supplies.
[[ it is the total wattage that I need, very specifically. this is the first I have seen from you indicating dual 920w power supplies...or I had gone blind for a moment... whatever....
if its dual supplies at 920 watts each then 1,840 watts x 3.4 to get btu's per hour taking that cooling requirement into the 6,000 btu/hr range]]
The apartment complex is near Madison, WI; Thankfully, the windows are pretty new and good about leaks.
[[ the room will be pretty well insulated in that case with relatively low air leakage, however the portables do exhaust air and in the winter cold air will be drawn into the room and heated by the electronics and that will result in humidity well below 35 rh and that is damaging to computers ( low humidity allows static electricity charges to damage the electronics ]]
[[ you should not use portable ac units in this case for that reason and others I have mentioned earlier ]]
FYI -- I double checked. All my circuits are 10amp only.
[[ The US electrical code requires minimum wire size #14 awg, those should be fit with 15 amp breakers. Many if not most modern residences have #12 wire to the receptacles and 20 amp breakers. You can put a 12 amp continuous load on a 15 amp breaker circuit and 16.5 amps on a 20 amp circuit. ]]
[[ http://ecmweb.com/basics/sizing-circuit-breaker ]]
I want to keep my server on separate circuit from the portable AC unit.... my thought was running a professional grade extension cable from the living room. The living room (TV+lights) are also on 10amp circuit, separate from the bedrooms.
[[ indeed the server needs to be on a separate breaker, and through a UPS unit to insulate it electrical spikes on the utility grid ]].
It will most likely be necessary to run at least one extra #12 awg copper circuit to the server room.
Let me know what you think, we can go from there.