On Wed, 07 Jan 2004 07:42:40 GMT, "George E. Cawthon"
wrote:



American Mechanical wrote:

"George E. Cawthon" wrote:

The
more efficient furnace will likely be more noisy.

????

Based on what? I'm going to have to see some info to support that, many
higher efficiency units have variable speed blowers that ramp to speed,
reducing blower noise etc. Just don't install a Lennox Pulse if you're
concerned with noise, we're not talking Atta-Boy's here! ;-)

- Robert

Based on surmise. You are just considering loudness. I
would expect the more efficient furnaces to run the blower
more of the time, especially if they use multiple blower
speeds. Just because the blower doesn't run at full speed
doesn't mean the blower noise isn't irritating and that
could be considered more noise, or noise more of the time.
I prefer a house to be dead quiet but it seledom is due to
the computer and refrigerator, let alone the furnace.

A small furnace noise observation: I was quite annoyed with my furnace
for the first few months. Sometimes it seemed quiet but quite often
there was a rather loud, slow, and pulsing resonant sound coming from
it that could be heard through the entire house. At first i thought it
was fan noise but strangely enough this would be louder up in the
bedroom than when i stood downstairs by the furnace. I eventually
just gave up and assumed our ducts were resonating somewhere in the
wall.

A few months after that we painted one living room wall and i was up
on a ladder near the return air intake. It was a very wide vent (2
feet whereas all the others were 1 or 1.5 feet). Turns out it is the
vent cover that was resonating. Not vibrating against the wall or the
duct. But resonating itself. I stiffened it up with a piece of wood
on the inside and now all is quiet. I have to stick my foot infront
of a register to tell if the furnace is running.