Recently purchased a tev026 and the ecm motor ramps up to 1400 rpm which seems to be max on fairly low cfm settings. 500 will get you there. So it will be at 1400 in heat stage 1 2 or auxiliary. Motor is only rated for 300 to 1250 rpm. The high rpm is not needed. Air is coming out of vents like a fan. Half the rpm would do the trick and would be a lot less noisy and create more even air distribution. Static pressure readings are fine and there is plenty of return air. Ductwork is sized correct. If anything oversized. Merv 11 so that shouldnt restrict return too much. Been told it is a board communicating issue but wanted to know if anyone had any ideas?