[Pc_Support] Re: Reducing Electricity Costs -- bulbs first and foremost ...

[Derek Konigsberg]

>> For the run-down on my actual power usage of machines in the computer room,
>> look here:
>> http://www.logicprobe.org/~octo/stuff/power.txt
>
> Assuming most these machines are on 24/7 how do you calculate the
> electric power they use per day?

Well, electricity consumption (what you're billed for by the power 
company) is measured in Killowatt-hours.  1 kWh is equivalent to having 
something running for 1 hour, that consumes 1 kW of electricity.  So you 
take the combined draw of my equipment in kW, multiply by the number of 
hours in a day, and you have the kWh per day.

Of course this doesn't tell you the power used by the HVAC gear (my A/C) 
to compensate for the heat produced by the equipment.  That is very hard 
to determine in a home environment since HVAC needs vary a lot with 
outdoor climate, airflow in the house, and human comfort needs.

-Derek