To improve the performance finally added a duct from the ac to the 200cfm fan and straightened out the duct run.
Before the added duct upstairs was 80 degrees after 20 minutes now its reaching over 100 quickly and maintaining it for an hour. Will be readjusting the AC's thermostat to find its new balancing point
This is at the top of the stairs where a splitter was added to reduce the air speed.
100 degree air feels real nice much nicer then 80 degrees which is not bad
Before the downstairs room would reach 24c /75F while the unit was running while the upstairs was 20c /68f , now the downstairs room has been staying at 20*
For winter heating bought a inkbird 308 temp controller it has a switch for heating and cooling. With it can set the exhaust fan to shut off when the vent temp drops / the ac goes off and have it turn on a ceramic heater upstairs at the same time.
This way I will have heat going 24-7 if needed and at no more then 1000w and hour.
Thats the goal , to heat the house on 1000 watts of energy this winter.
So far Im using 500 watts an hour for heat. The kill-a-watt meter makes for easy record keeping the ac has been running on a hour on hour off cycle on auto some days running 4 hrs less some days running 4 hrs more. It always balances out at 50% off 50% on. The other night it ran for 6 straight hours it does what it can with the weather its got. its been wet and warm lately with a 10c average.
For now its clear sailing won't see cold temperatures until the end of December