Quote:
Originally Posted by RedRaider56
On the biggest HVAC unit I replaced, it had the variable speed motor. One advantage to it over the old system was how much quieter it is. As another poster had said, when it is running on the lowest speed, I can't hear the thing running.
On the second system, for our upstairs, I went with the 2 speed setup. Even when the kids are home from school visiting and the AC seems to be on all the time, it stays on low speed the majority of the time.
With the combination of the efficiency of the new systems and the new fan setups, my AC bills dropped over a $100 a month at the peak summer months heat last year.
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My biggest selling point on the VS fans is noise reduction & humidity control. (by moving air slower across the coil it removes more humidity per pass) Energy savings are nice but they don't generally equal a lot as the blower doesn't use a ton of electricity, and you also have to consider you now have a very expensive blower motor in there & if it goes out any savings you made will go into the repair.
The noise reduction due to running in low speed is super nice, but you also have to consider that on extreme temperature days it's going to have to run at a higher speed so it will still make close to the same noise at that point.