I have a separate post regarding duct sizes but our new unit is using more electricity than older unit. Both are 3.5 ton. Prior unit was a 20 year old 10 seer, new one is 14 seer. The two differences are airflow and cycles. The prior unit would run and run, sometimes for 90 minutes or more at a time. Long run times even in early evenings. The new unit runs between 11 and 14 minutes on 84 degree days. On 92 degree days for maybe 23 minutes
So the new unit cycles a whole lot more. Is that causing my higher electricity usage?
The airflow is much stronger even with a one inch merv 10 filer. The humidity is usually between 45 and 55%. The 55% is normally only in the morning hours until the unit comes on. It is a single stage unit. House is 1700 sq ft excluding sunroom. House gets full sun all day. Airflow is much stronger even if fan is on low. They did turn the new air handler to eliminate an angle in the plenum. The plenum now goes straight up