Variable speed blower noisier?!
BadLoonie, what a coincidence that I repost here following your last reply.
So, since I started this post, I've had a visit from the ducting contractor and the utility company that I may oblige to replace our unit with a 2-stage variable speed one.
The ducting contractor insists there is nothing wrong with the duct-work, standard 5" ducting going _straight_ to our bedroom. That _straight_ part is likely the "problem" as it's a very short duct, with very good air flow, AND noise transmission ;). In doing the best he can, the contractor added a few lengths/bends to the duct and routed it to the other side of the plenum.
The noise is somewhat reduced, and so is the air flow (hopefully it won't be problem with heating/cooling).
Now, with the two parties (ducting/furnace ppl) claiming that everything seems kosher enough, I may have the option to installing a 2-stage furnace with variable motor.
BUT, the furnace guy, who I believe to be a real pro and count his words, is warning me that from his own experience a variable speed blower will actually be louder! Unless you can tell me otherwise, I will take his word for it and decide-against making the furnace swap.
Just doesn't make sense to me, how could 2-stage/variable speed furnaces which very purpose is to work at '1/2 speed' or 'full speed', be louder than a single-stage unit that is fixed at 'full speed'. What's up with marketing these 2-stage furnaces as being more comfortable in stable temp and noise... hrmmm
Confused and hesitant,