Nope, you have to start with “live load” as a minimum.  All that power you are 
buying is being converted to heat (unless you are pumping water etc).  So, year 
around that has to go somewhere.  In a colder climate it can offset heating but 
worst case is moving that heat out in the summer plus whatever heat you are 
gaining from the environment.  

From: [email protected] 
Sent: Monday, June 26, 2023 12:50 PM
To: 'AnimalFarm Microwave Users Group' 
Subject: [AFMUG] Heat estimate

I’ve been assuming that whatever energy you put into an electronic system is 
coming out as heat –there might be multiple conversions before it becomes heat, 
but it must become heat eventually.

A resistive heater is said to convert 1 Watt to 3.41 BTU/hr.  So that’s the 
conversion I’m using.

I’m largely ignoring other factors because I’m assuming the overwhelming 
majority of heat in the room is the heat from my equipment, and the goal is to 
pump that heat outside.

 

I don’t think I’ve undersized an air conditioner yet using that methodology, 
but is it overkill? 



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