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mjricemonica 03-24-2010 10:41 AM

variable speed furnace
I just had a variable speed oil furance installed...the quietness was one of the selling points but when it is ramped up to the maximum speed it is anything but quiet. Does anybody know if the speed can be adjusted to make it quieter? I read somewhere in the literature it was factory set so don't know if this is possible or I just need to get used to it but I paid for quiet and it's not.

hvac122 03-24-2010 11:56 AM

Call the installers back. It dosn't sound like they have the blower set up right. There could be many settings depending on what brand you bought.
The other problem could be that it is to big for your existing ductwork.

mjricemonica 03-24-2010 12:20 PM

variable speed furnace
Thanks HVAC 122...I just called my furnace installer and they will be back to adjust my fan. Thanks so much for your advice.

beenthere 03-24-2010 04:27 PM

Did they do a load clac. Or just install the same size furnace. So that your still now your duct work is too small for the air that the furnace needs to move.

VS blowers connected to under sized duct work. makes for a loud system.

mjricemonica 03-25-2010 07:25 AM

VS furnace
I'm hoping it's just an adjustment...what alternative do I have if the ductwork is too small for the system short of putting in new ductwork?

beenthere 03-25-2010 12:38 PM

Have them install the right size furnace.

Did they just install the same size as what was there?

They should have done a load calc.

While they can adjust the blower speed to make it quieter. That doesn't mean that the temp rise will be low enough to be safe for the furnace.

How hot is the air when it comes out of the registers now? And what is the temp of the air entering the return register?

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