I did not know about the blower efficiency. Will have to check into it.
What should the static pressure be?
The installer was conserned about high readings and ran flex duct from the plenum to mixing boxes on the other end of the house to try to reduce the numbers.
I reallly hate to say this but should I have the duct system replaced with ducts designed for this system? If static pressure is really the cause of the high kWh consumption, that seems to be the only real solution.
If duct replacement is the only option, what are your opinions on flex duct vs fiberboard etc. The home has metal flex wrappped with insulation and a plastic outer layer other than all the flex duct that was installed......