[Organizers] When to cancel dance?

[Jeff Raymond via Organizers]

Wouldn't it depend on the prevailing breeze if any? Sometimes I'd run the
left side blowing out, the right side in. And I was always checking them
becasue often spectators will turn the down or off.
Jeff
On Jul 22, 2016 8:51 AM, "Orin Nisenson via Organizers" <
organizers at lists.sharedweight.net> wrote:

> I don’t understand the principle behind having the fans blow air into the
> hall. Are you not just adding the hot outside air into an already hot room?
> By blowing the air out the air movement will draw cooler air from the
> basement, or other cooler areas, into the main hall.
> Orin
>
> On Jul 22, 2016, at 1:44 AM, Walker Sloan via Organizers <
> organizers at lists.sharedweight.net> wrote:
>
> Deanna,
>
> It is imperative to understand what dew point is and means.  Humidity is
> less important.  Briefly, skin temp is mid 70's.  If the dew point exceeds
> mid 60's, humans get kinna miserable because sweat does not evaporate
> well.  This not only leaves people feeling sweaty and gross, it also means
> they are getting minimal to none evaporative cooling, which is our first
> cooling means.  When dewpoint reaches mid 70's, life is really miserable.
> That's tropical.
>
> wunderground.com will give you local weather.  You have to customize it
> to get dewpoint.  Dewpoint will be substantially lower in a hall with AC.
> Besides cooling, AC condenses humidity out of the air, lowering the
> dewpoint.  You could get an instrument to measure dewpoint, or get a
> temp/humidity instrument, and a data sheet on line telling you what
> dewpoint is for a given temp and humidity.
>
> You can see how awful it is for yourself dancing at what kinds of
> dewpoints, and calibrate when you have zero interest in dancing.  My guess
> is that when HALL dewpoint exceeds 65 degrees your attendance will fall off.
>
> At our dance in Concord MA, we get 12 cans of lemonade and 40# of ice at
> our higher temp evenings, which are cooler outdoors than GA.  This is for
> 140-180 people.  When outdoors exceeds 90, our committee chair gets frozen
> treats.  We have only fans, no AC.
>
> My own expectation is that 75-78 degrees in the hall should be quite
> survivable.  With AC the dewpoint will probably be in the low 60's.  My
> experience is that dancers are far more concerned about air moving over
> their bodies than about temperature.  Lots of controversy about fans
> blowing in and fans blowing out.  We always have all fans blowing in, and a
> big cupola fan exhausting at the peak of the roof.  Again, without AC.
>
> I once calculated that at Scout House in Concord with 14 window fans
> blowing in and the cupola fan blowing out, we get an air change in the hall
> every two minutes.  BUT with a room full of 100 watt generators dancing
> vigorously, they raise the room temperature 12 degrees over the outdoor air
> blowing into our un-air conditioned space.
>
> At mid 70's with AC I doubt your attendance will fall off much.
>
> Good luck.  If you ever get around to quantifying your temp AND humidity
> or dew point, I'd be _very_ interested.  Particularly when your attendance
> starts falling off due to heat.
>
> I once danced in a hall in Maine that had maybe 6 square feet of window
> space.  I sweated _through_ my leather belt.  But the crowd had a great
> time.
>
> I would not be surprised if southerners all used to strong AC would be
> less tolerant of heat than us northerners without AC in our halls.  :)
>
> Mac Sloan
>
>
>
> On 7/21/16 18:47, Deanna Palumbo via Organizers wrote:
>
> With the current temps in the US at an alarming high, our dance hall has
> been running hot, with their one A/C unit cooling to 75-78 degrees while
> dancing.  We keep it pretty windy, with lots of fans (quietest ones in
> the hall are small Lasko units and louder ones in the back).
>
>
> That being said, at what point do you cancel the dance because of heat?
> Dancers are already complaining and all we can do is keep it windy.  Of
> course, we could cut our losses if minimum capacity of dancers are not
> coming because of the heat.  In the past & at another hall, we used to
> cancel all of August because of heat, but I don't know how you can make
> that call because you really don't know how it will feel (or how many
> dancers will attend) until you get there.
>
>
> Deanna Palumbo
> /Chattahoochee Country Dancers, Atlanta, GA/
>
>
>
> _______________________________________________
> Organizers mailing list
> Organizers at lists.sharedweight.net
> http://lists.sharedweight.net/listinfo.cgi/organizers-sharedweight.net
>
>
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
> Version: 2016.0.7688 / Virus Database: 4627/12656 - Release Date: 07/21/16
>
> _______________________________________________
> Organizers mailing list
> Organizers at lists.sharedweight.net
> http://lists.sharedweight.net/listinfo.cgi/organizers-sharedweight.net
>
>
>     U.S. Virgin Islands Snow Plowing Service
>      Serving St. Croix, St. Thomas & St. John
>              Fast reliable service
> Driveways and parking lots / No job too small or large
>
>
> _______________________________________________
> Organizers mailing list
> Organizers at lists.sharedweight.net
> http://lists.sharedweight.net/listinfo.cgi/organizers-sharedweight.net
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sharedweight.net/pipermail/organizers-sharedweight.net/attachments/20160722/fe26b451/attachment.htm>