Tuesday, August 9, 2011

Are shorter more frequent HVAC cycles more efficient than longer less frequent ones?

I recently upgraded my Stat to a new WiFi controllable one. Today, our first hot day, the A/C unit was cycling at a much shorter rate ( 5 min. on - 10 off ) than it used to ( 20 min. on - 30 off ). The swing bandwidth on this stat is set to 1 deg. by default and can be set from .5 deg to 2 deg. Q? Are the shorter cycles more efficient ( energy usage ) or should I increase the swing bandwidth to match more of what my old stat was doing? ( the old stat seemed to swing between 2 and 3 degrees from start to stop of ea. cycle ). The A/C unit is working perfectly. Output at 52 deg. Dry climate here in CA so no freezing iced up coils. Freon level correct. 5 ton unit / 2000 sq. ft house. Thanks for any advise you can provide. - Mike ((mvmike@yahoo.com))

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