[sudo-discuss] Ventilation fan installed over sudoroom!

Thu Jul 8 19:13:44 PDT 2021

The fan is fucking great btw! Imagine not feeling stuffy at sudo during the
summer anymore. 🤯

On Thu, Jul 8, 2021, 1:58 PM Patrik D'haeseleer <patrikd at gmail.com> wrote:

> Do we have a second fan - ideally one that is correctly weatherproofed for
> roof installation? I'm still thinking to install one on the skylight closer
> to CCL as well. Maybe the big one above Sudo is sufficient for the entire
> room though - will check next time I'm in.
>
> I know some people may think this goes against the hacker ethos, but I'm
> all in favor of using an affordable, ready-made, quiet,
> commercial-off-the-shelf solution if available. Bonus if we can avoid
> raising eyebrows in the unlikely event that any inspector ever bothers to
> go check out the roof.
>
> Patrik
>
> On Thu, Jul 8, 2021, 1:12 PM Jake <jake at spaz.org> wrote:
>
>> Between myself and another sudoroom member, we have more than enough solar
>> panels to greatly offset all of our fan use.  There is no need to buy
>> anything,
>> only to send volunteers to help configure and install these things.  But
>> that
>> has to be off-list for technical reasons.
>>
>> -jake
>>
>> On Wed, 7 Jul 2021, Patrik D'haeseleer wrote:
>>
>> > By the way - if any of you roof monkeys are up there again, it would be
>> > great if someone could also have a look at the exhaust fans above the
>> > entrance hall! Rob mentioned he may have located a switch but didn't
>> have
>> > time to do any troubleshooting yet - not clear if they are getting
>> power,
>> > if the motor is busted, or what. Would be worth running over a temporary
>> > extension cord to check...
>> >
>> > I don't have much time to play on the roof this week, but I'd be happy
>> to
>> > pay for a solar powered attic fan if someone can figure out how to mate
>> it
>> > with the vent in the skylight. Home Depot has a couple models in the
>> > $200-300 range
>> > <
>> https://www.homedepot.com/b/Building-Materials-Ventilation-Roofing-Attic-Ventilation-Attic-Fans/Weather-Resistant/Exhaust/Roof-Mount/Solar-Attic-Fan/N-5yc1vZc65uZ1z19cj7Z1z19v14Z1z19ygqZ1z19ynt?NCNI-5&storeSelection=
>> >
>> > .
>> >
>> > Patrik
>> >
>> > On Wed, Jul 7, 2021 at 4:47 PM Patrik D'haeseleer <patrikd at gmail.com>
>> wrote:
>> >
>> >> Yay! How noisy does this fan wind up being when it's running? If I
>> >> remember correctly, this is a 2000 CFM inline duct fan, which seems
>> >> overpowered for use as an exhaust fan.
>> >>
>> >> The power issue is also why I had been looking into solar powered
>> exhaust
>> >> fans - you can power a 1000 CFM attic fan fairly easily from just a 15W
>> >> solar panel. (The reason why Jake's fan is 500W is because it's
>> designed to
>> >> push that 2000 CFM through a network of ducts.)
>> >>
>> >> We might want to loop in Rob's friend Elon, who knows quite a bit about
>> >> building ventilation, and has been checking out air turnover rates in
>> the
>> >> building with an eye on reopening for events.
>> >>
>> >> Patrik
>> >>
>> >> On Wed, Jul 7, 2021 at 3:43 PM Autonomous <autonomous666 at gmail.com>
>> wrote:
>> >>
>> >>> 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 at 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
>> >>>>> _______________________________________________
>> >>>>> sudo-discuss mailing list
>> >>>>> sudo-discuss at lists.sudoroom.org
>> >>>>> https://sudoroom.org/lists/listinfo/sudo-discuss
>> >>>>>
>> >>>> _______________________________________________
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>> >>
>> >
>
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