The heating season is over the numbers are in it appears the ac has payed for itself in these last 5 months of use. The duct and fan played a big part in the savings spreading the AC's heat to the house , highly recommend its use with a portable AC.
Its likely the key to the Ac's successful season.
Below the chart has last years consumption vs this years.
The two tier billing made for some good savings
First tier = 22.2kwh per day $0.0858 cents Kwh (30 days 665 kwh)
Second tier = anything over 665 Kwh per month cost $0.1287 (50% more)
2017 monthly Kwh
Dec 1900
Jan 1840
Feb 1600
March 1570
April 900
Season total = 7810 kwh minus first tier 3330 kwh = 4480 kwh 2nd tier rate
1st tier 3330 x 0.0858 cents = $285
2nd tier 4480 x 0.1287 cents = $576
Total $861 (minus taxes & fees)
2018 kwh
Dec. 1165
Jan. 960
Feb. 900
March. 738
April. 534
Season total = 4297 Kwh minus 3330 kwh = 967 kwh for tier two pricing
3330 kwh = $285
967 x $0.1287 cents =$ 125 Total = $410
$860 minus $410 = $450 saved on heating
Portable AC was $350 Fan was $80 10 inch aluminum duct cost $20 forget what I payed for the 6 inch duct I had it already.
In closing , I will likely use the ac on the hottest days of summer which will add to the yearly total. I really enjoyed using the heat pump , this winter the house was kept warmer then I would of with the electric baseboard heat.
Will post back Dec 2019 with the full years consumption Data to complete the test run.
keep happy