Early warning of problems and spare capacity in the cooling system are both highly desirable.The amount of heat generated is known as the heat gain or heat load.This article is a quick guide to how to work out your requirements for an air conditioning unit for your Server Room or Data Center*.In principle it’s easy to calculate the size of air conditioning unit you need for your Server Room, just add together all the sources of heat and install an air conditioning unit that can remove that much. Fire regulations often require that Server Rooms have levels of insulation far above that of a normal office.Providing sufficient cooling is essential to ensure reliable running of servers, routers, switches and other key equipment.Failure of the air conditioning can have serious consequences for the equipment itself and for your company.Small units may fit in windows, venting to the outside world. * Disclaimer: This calculation is intended as a rough guide only. Before you decide on an air conditioning unit you should commission an audit from a suitably qualified air conditioning equipment specialist or installer.
Heat is measured in either British Thermal Units (BTU) or Kilowatts (KW). The heat load depends on a number of factors, by taking into account those that apply in your circumstances and adding them together a reasonably accurate measure of the total heat can be calculated*.
Factors include: The floor area of the room The size and position of windows, and whether they have blinds or shades The number of room occupants (if any)The heat generated by equipment The heat generated by lighting Window Size and Position If, as is quite common, your Server Room has no windows, you can ignore this part of the calculation.
However it is probably safer to overestimate the wattage than underestimate it.
Add together all the wattages for Servers, Switches, Routers and multiply by 3.5. Small air conditioning units have a cooling capacity of between 500 BTUs.
If, however there are windows you need to take the size and orientation into account.Purpose built Server Rooms don’t normally have people working in them, but if people do regularly work in your Server Room you will have to take that into account. Clearly most heat in a Server Room is generated by the equipment.