For the sake of argument and discussion, let’s use a perfectly matched, balanced, and calibrated R-410a home a/c system as an example.
Why do folks say it’s more efficient for said home a/c system to run continuously for 2 hours and then off for 5 minutes instead of cycling on/off much more often to achieve the same interior cooling setting on the thermostat? (I understand how home a/c system work, but I’d like to know why some say longer run times = greater efficiency.)
I’ve heard this claim time and again, but I’d like to know the science behind it. I live in Texas where a/c units run for hours during the day from June through September.
In: Engineering
Combining multiple answers… when you turn on a motor or pump, it takes usually 3 times the energy. Once running, it’s more efficient. Next, 90% of air conditioning is removing the moisture in the air. It takes a bit of time for the consenldenser to remove the water from the air. Afterwards, it’s very easy to cool air after the temperature has reduced, as well as the moisture.
Keep it running for long enough. This is why there are calculations of how large of an AC you need.
Latest Answers