I recently had a variable speed dual stage furnace installed (Goodman GMV9070CXA).
I noticed that when it's on high stage the noise at the vents is louder than my old furnace (a 20 year old single stage).
Now that the hot weather is here and the A/C unit is on the ammount of air blowing through the vents - and the noise seems really excessive.
I asked the HVAC guy if he could turn the fan speed down and he said no - it will seize the A/C unit.
I checked into it and found that the cooling fan speed is at the default factory setting, which is the maximum speed the fan can run at.
Now the goodman manual says that I need about 400CFM per ton. I have a 2 ton A/C unit. So that's 800 CFM
The unit is currently set at 1429 CFM.
So what's the deal here? It seems to me that the fan is blowing 179% of what it needs to.
If I turn it down to 800 CFM it will be nice and quiet.
But will it seize my Bryant 594D 2 ton air conditioner.
My wife and I can't atand the noise!
(Typing loud so I can hear what I'm writing).