2qwerty: Thanks for the useful and informative information. However, I’m not sure the same analogy about timing the compressor works for an HVAC system using the type of thermostat with a lag response that is impossible to predict. If the cooling is set to 70 degrees in some small shteeblach and the ambient room air temperature is at that same 70 degrees, having a few daveners walk into the room could increase the room temperature by a degree within a minute or two, thus triggering the thermostat to start the compressor to cool the room back down to 70 degrees. I don’t think you would stand outside the beis medrash and only go in while the compressor is already running to avoid being the davener who starts the compressor.
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