Originally posted by bigalf
... Will the fact that the two tonners are too big mean they will be stopping and starting a lot and so using more power?
Alf, one problem is with humidity control. If the system is not running, it will not dehumidify.
Cold & wet is not comfortable.
If the humidity is under control, most people are just as comfortable with a room temperature in the summer.
That saves money.
Starting a motor is very hard on it. Long run times, with properly sized systems will save money on energy, plus repairs.
A system takes a few minutes to stabilize and operate at the SEER (efficiency) it is rated at.
Excessive startups means higher electric bills & shorter life of the equipment.
Get it sized right.
A more expensive system, done right, is cheaper in the long run.
RSES Certificate Member Specialist
Southwest Regional Association of RSES Secretary, 2017