5 C for the camera system, the electronics and the mirrors. All other rooms will have a similar acceptable temperature range. The cooling compressor should not induce vibrations to the floor and to the support structures for the camera. A separate base would be the best. The power needed for calibration should be rather small.
Communication is probably the next biggest consumer.
Some kW of power will be needed during installation at the plugs in the working area and in the bays. The high dynamic range of the telescopes requires the analog electronics to deal with very small signals. Many more ideas have been discussed here but these dig much too deep into the details of the building and are of no concern now. Please contact me if you have questions concerning this long description. Best regards Hans.