Furnace fan can be set to "auto" and "ON", I ususally keeps it on the
I think when you keep the fan "ON" the fan will run contineously while
on "auto" it will start and stop automatically as per the need.
Does anyone know which weather condition you should keep the fan to
"ON"? Thanks in advance.
I've had my fan switch set to 'on' for the last 15 years. Costs a little
more than a 100 watt light bulb to run, but stopping and starting is worse
for an air cooled motor than leaving it on. Make sure you keep the air
filter clean. You'll sleep better, and the temperatures will be more even.
I tend to leave the fan running continuosly more in the summer time
than in the winter. But I think the motor draws more juice than a 100W
light bulb. If you have a 3/4HP blower at the very least it uses 5 amps.
That I suppose would mean that the air in the house is cleaner.
But only a little bit
I always leave mine on auto. These are mattters of taste, and De
gustibus, no est disputandum (or something like that: There is no
disputing with regard to taste.) but I don't care if there are minor
variations in temperature, and I like the silence when the fan is off
altoghether. It would drive me crazy to have it on all the time.r.
Remove NOPSAM to email me. Please let
me know if you have posted also.
A constant noise is less distracting than one that changes (on and
BTW, I remember spending the night with someone who left the fan on
all the time, and the room I slept in was next to the furnace. I never
noticed the fan after a few minutes except once. That time, it was a
Ive got a 1/2HP on mine, its pulling about the same...but then, load, due to
the duct design, will play into this, and most people do not clamp a meter
on, close the door, and take a peak reading with the blower under load.
The last 2, 100000 btu furnaces Ive had pull apx 375 watts on a direct
drive blower. that will cost anyone at .125kwh a standard US rate apx
35$ a month run 24x7. That is a bit of a waste. No furnace blower ive
seen can pull only 1.2a under load. I think you are measuring it wrong.
Let''s look at it this way:
Ideally, 1hp = 746watts
If a motor delivers 1/2 hp, then its actual wattage will run over half
of this, because the motor isn't 100% efficient at converting electrical
energy into useful mechanical energy.
A half horse blower motor consumes about 400 watts.
On low speed, however, at 230 volt, the amperage draw can run down
around the 1.2 amp region.
On many newer units continuous fan is defaulted to low speed, which is
equivalent to about 1/2 the rate hp of the motor.
IOW, on low speed a half horse motor will be running at closer to 1/4
hp, or thereabouts, or somewhere in the region of 200 watts, and the amp
draw corresponding to this on 230 volts is down around the 1 amp mark.
I've seen them running under 1 amp.
LOL! Bob, you're either leaving out some relevant facts, or
you're lying, I'm not sure which! Also, most fan motors aren't
continuous duty in the way you're claiming to use them.
What's missing from your post? Or are you just full of it?
: > Furnace fan can be set to "auto" and "ON", I ususally keeps
it on the
: > "auto"
: > I think when you keep the fan "ON" the fan will run
: > on "auto" it will start and stop automatically as per the
: > Does anyone know which weather condition you should keep the
: > "ON"? Thanks in advance.
Air-cooled direct-drive blower motors can be run all the time, but you
should have a properly sized duct system, and keep your filter clean. It's
much worse to stop and start them all the time. Once those motors get going,
they have very little strain on them.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.