Converting sngle-speed HVAC to multi-speed?
I have a heat pump air handler that is only single speed (only one speed tap) which has been retrofitted with a 5 speed ECM motor.
I am guessing that I could put the speed tap on medium low (it's currently at medium, the default choice for a (stock/OEM) 3-speed PSC motor), or, once I find one, install a 5-speed manual selector switch. I find that the heating function could work on a lower speed on a cold winter day as it isn't getting that much heat and a slower speed through the evaporator may well be more efficient.
I did come across this product but it does come with its own ECM motor which does not use the speed taps as mine does (Mars Azure). The nice feature of this product is that is measures output air temp.
Are there any similar products that work with a Mars Azure?