I double checked using a box fan in the top of the doorway and even with it going the upper floor does not heat after a few hours while the basement room broils at 39*c
Moved the unit outside to run tests
Test conditions 1 hour run time
5 readings taken in 10 minute intervals
Outside temp started at 8*c at test end was 10*c
Cold air vent -3*c on the fan wheel down to -10* from the center of the vent screen
Hot air vent 40*c to 45*c depending on where in the vent the reading is taken
Did not notice a defrost cycle
The show is not over yet its mod time
As the saying goes "If at first you don't succeed try try again"
Round 2
Dual 6 inch ducts
Sealed two layers of cardboard to the vent and resealed it with a 3rd layer over top
It was easy enough to do used the filter cover for a template trimmed the cardboard with scissors cut 5 3/4" holes with a knife and taped it tight with tuck tape.