On 12/9/2015 3:28 PM, firstname.lastname@example.org wrote:
That can;t sork -- if the *fan* is allowed to wobble (the cowling
will wobble with it and, inevitably, dig into the ceiling).
I installed a fan above in-laws kitchen table ~35 years ago
and the hanger was a hook-and-eye; hook went through center knockout
of octagonal box into 2x6 straddling ceiling joists. Lift eye on
fan stem onto hook. Connect wires. Slide cowling up fan stem
until *close* to ceiling. Secure set screw.
The two fans on the back porch (here) use special brackets
with a "ball" end on fan stem that slips *into* saddle bracket
secured to Jbox (special boxes with reinforced bosses that
transfer load directly to back/top surface of Jbox). They
have far less wiggle room as the fan motor assemblies are much
wider, shrouded and very close to ceiling -- I can't even see
where the cowling *would* fit against the ceiling (no ceiling
Only absolute bottom of the line fans have been that way for the last
10 years or more. In other words, just the junkiest of the junky junk.
Those have the "gimball" and the canopy fits tight to the ceiling (or
junction box) and the fan moves IN the canopy. No whay a properly
tightedned current type fan could ever rub the canopy against the
The "fixture" looks like a fan and a light. So, two "supply" wires (line)
and one "return" (neutral) wire.
This allows you to install a speed control for the fan *and/or* a dimmer
for the light. Had the two "supply" wires been tied together *in* the
fixture (i.e., so the fixture just had one hot and one neutral), you
could use the switches (pull chain, etc.) to control the fan and/or
light, but couldn't use a dimmer or speed control (because you couldn't
"supply" just the fan or just the light from that REMOTELY located
How do you *want* the fan/light to behave? Within reason, you can change
this behavior (e.g., so both turn off with the switch; add a second
switch for REMOTE control of each function independantly, etc.)
How does your mother want it to work.
Bear in mind, when the fan runs and no one is in the room, it doesn't
make the room cooler. It makes it warmer. The fan gives off a
little heat and moving air is equivalent to heat, plus it blows the
warm air near the ceiling down to where the people are. Not that fans
are bad -- most people like them -- but they don't help when you're
not in the room and you might want to turn the fan and the light off
On 12/6/2015 6:51 PM, email@example.com wrote:
Many fans have a direction switch (located *on* the fan itself -- often
a "slide" switch; usually arranged so sliding it towards the ceiling
causes rotation that moves air upward and sliding it towards the floor
reverses the direction so air moves downward).
Here, things get counterintuitive... :>
Pushing air downward creates a bit of a draft on the occupants to
facilitate evaporative cooling (i.e. summer use). Pulling air upwards
ends up pushing the air trapped above the fan (displaced by the air
being drawn upwards) out to the walls and down into the room to heat the
[Intuition suggest the opposite would be the case!]
Of course, the cooling effect only makes sense if there are
entities that can *perspire* in the air flow! A fan running
in an empty room doesn't cool ANYONE!
On Monday, December 7, 2015 at 5:30:59 PM UTC-5, Don Y wrote:
The last part has been posted, repeated many times, but I'd like
to see a test that it actually raises the temperature of the room
down below. When you move air across the ceiling, you're disturbing
the boundary layer of air and likely increasing the heat loss through
the ceiling. I have mine set to down and only run them in summer.
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