Nick Phoenix

That's the whole point of the question I posted in the first place. The people are going to come anyway, were just trying to find the best way to get rid of the water. So check ventilation off your list, epic fail.

THE FLOOD! May 31st, 2011. 93 F We got to the club at 3pm, opened 3 windows. Two fans were exhaust, one fan was intake. 5pm, condensation begins in the corners. 6pm, condensation is spreading 7pm, visible condensation all over the floor 8pm, this is the most ridiculous scene ever! Water everywhere. So to all those interested. Ventilation is NOT the answer. Maybe if you had a windtunnel sized fan. Next week we try 1 AC unit and 3 dehumidifiers.

MY "Dilemma" is I just want the water to stop condensing on the floor after 2 hours of play. Which happened yesterday, May 24th. We started at 6pm in Phoenixville, PA 19460. 8:30pm the floors started getting visibly slick. Someone did fall. Room temperature and humidity did increase during that time. We did not open windows, just used 2 dehumidifiers and an AC. The dehumidifiers were pretty full by the end of the night, 10pm. Next week we use the fans and ventolate again. (do I do that even if it is raining?)

It's that time a year again. I thought I'd get a jump on the condensation problem. Here's what I've got: On rainy days, just run 2 dehumidifiers. But which do you think would work better on clear days? Run dehumidifiers or ventilate with 2 fans and open windows?

We open in the evenings, however, it is also a borrowed facility. We do not have any control over it during the day.

Here are the changes we can make. -We can add one more dehumidifier (we have 2 already) -We can place fans on the floors and fans in the windows That's about it. Last night we tried fans along the walls only, facing opposite directions. Condensation did not occur till about 9:15, we opened at 7. I would like to try venting using a fan in one window pointing out and another pointing in. I am fearful that this could cause the condensation to occur right off the bat, I was hoping to find some kind of measurable marker to figure out if that would happen. If it did, the entire night is lost. The one dehumidifier has a meter on it. It said that when we started, humidity is about 80%, it brought it down to 63% before anyone arrived, and it read 69% when the condensation started to occur. (this unit is in a corner however, if that affects measurements)

So as I see it, I will ventilate with fans at ceiling level, since that is where the windows are. But, what if it is raining or there is high relative humidity? If the floor is colder than the dew point, and I ventilate when it is raining, will the floor get slippery sooner? Are there markers in between relative humidity, air temperature, dew point, and floor temperature that I can watch for to determine if I should or should not ventilate? For argument's sake: Air Temp is 78 degrees F, dew point is 62 degrees F, floor temp is 54 degrees F, If relative humidity is < X ventilate, if it is > X, do not ventilate. Is this a correct way of looking at the situation? I also assume that if the floor temperature > dew point, then I will not get condensation. With air temperature remaining constant, regardless of relative humidity, uless we reach 100%. Is this also correct?

Where can I find the definition of the variables?

Greetings learned person! I bring to you a problem of condensation. We have a 5000 sq ft basement with a tiled concrete floor. Next we introduce 25-34 people and have them enjoy the sport of table tennis for 4-5 hours. It is Spring and the relative humidity is high. The players perspire. Humidity increases in the basement. There are two bucket collecting dehumidifiers running non stop, and one small airconditioner running. After 2-3 hours the floor begins to draw moisture out of the air. The condensation makes the floor slick, and players cannot play. The condensation starts where the floor meets the exterior walls and slowly moves toward the center of the room. How do we stop the condensation? The answer must be valid for sunny and rainy days. You may use any text book, or mathematical formula to come to your conclusion. The most effective solution presented will have the eternal gratitude of the Phoenixville Table Tennis Club! Thank you, you may begin.