User comfort is pending on the climate within a space. A consistent temperature is always ideal, however people do not like to be either extremes of hot or cold.
Ventilation: Good ventilation is important in any space designed for occupancy. Clean air should always be in circulation.
Heating/ Cooling: A space should have heating and cooling units (depending on geographic location). Consider that each eight computers equals roughly one space heater, as does each 15 people in a room. The heating and cooling unit should have enough ducts to serve that space and its density of users. Location of ducts and their mechanical noise levels should not interfere with the productivity of the user.