However, now after talking to Carrier I know for sure the Infinity control is a thermostat. I had thought before it was something you install on the furnace itself not something that replaces the thermostat (programmable or not) that you put it up the wall.
My idea was to just install the furnace without this control and later on add the control as now I know that the ‘M’ in 59MN7A stands for ‘Can Modulate’ not ‘Modulate’ but the CSR told me to put it this at the beginning as to make sure everything works ok.
I liked the guy who proposed Carrier and I would have gone with his company, especially after he told me that most of his clients go for this furnace. However, I am sure that they have no idea that their furnace is not really modulating as they do not have the controller. And I wish I was like them. The less you know the happier you are .
Now I don’t know to believe about the contractor I was very much inclined to go with.
1. Either he did not know – even if he should – that the 59MN7A… is not modulating without the control so unknowingly he tried to sell me functionality that couldn’t be achieved. I would kind of ‘accept’ it and let it go if this was the case.
2. This was a marketing ploy to buy a more expensive one as in he (i.e. me) would not mind paying $ more than the quoted 2 stage Carrier 59TNA6A for the perceived extra efficiency but I would lose him as a customer if I asked much more money (the controller is around $600 that would be added to the "modulating" furnace). And in this case I would not want to work with them. Tell me frankly all the options and let me choose but don’t play ‘tricks’ on me.