7 Jul
2021
7 Jul
'21
3:43 p.m.
I would also add that this type of exhaust fan is not designed for
continuous use due to overheating and the potential fire hazard risk. I
have a similar type of fan installed in a 4800 sqft building that is cycled
30 minutes on and 30 minutes off. It can become quite hot after 30 minutes
especially in warm weather.
On Wed, Jul 7, 2021 at 5:10 PM Eric O'Connor <eric(a)oco.nnor.org> wrote:
At the risk of being a downer (but I also know
Sudo/Omni is having
insurance issues), I just wanted to point out that Cal Fire code 605.5
recommends against an extension cord going through a ceiling or wall.
Extension cords and flexible cords shall not be
affixed to structures,
extended through walls, ceilings or floors, or under doors
or floor
coverings, nor shall such cords be subject to environmental damage or
physical impact.
As long as it has a drip loop it’s probably fine, but I’m not an
inspector, and haven’t seen the fan either.
Sorry if this is not helpful for whatever reason. If that is the case,
just add this email to the long list of useless information flowing around
the internet :)
On a more positive note: The control system ideas sound rad!
Eric
On Wed, Jul 7, 2021, at 13:48, Jake wrote:
Last night an intrepid cabal of hackers hacked
their way through a
skylight to
install a high-flow ventilation fan on the roof!
The power cord hangs down into sudoroom so that mice and tiny hackers can
rappel down into the space rather than use the door like a noob. Also
the
power cord can be used to supply power to the fan
so that it runs.
It uses 500 watts but is quite powerful. I haven't seen our electric
bill
but
assuming we're paying about 25 cents per
kilowatt-hour, leaving it on
all the
time will cost us $3 per day, or $92 dollars per
month.
I think that rather than leaving the fan on all the time, we should
create a
sophisticated control system using a microphone
and AI machine learning
to
detect when people are flapping their mouths
(meat talking) in the
space, and
turn on the fan during those times. We can also
measure humidity, or
have a
camera watching for motion, or even look at
network traffic and see if
people
are using data in the nearby area. I can supply
the relay connected to a
server where this software can make those decisions.
here is a picture of the finished product as viewed by birds. If you
want to
see what it looks like from below, go into
sudoroom and plug it in.
https://sudoroom.org/wiki/File:Sudo_apt_install_vent_fan_on_roof.jpg
-jake
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