Message Board Thread - "Air Conditioning and moisutre problems (pic1)"

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Air Conditioning and moisutre problems (pic1) solution 1/17/2008
Hi guys, I took a quick thermal image of a friends apt. who's ceiling in the master bedroom is full of moisture (pic1) Apparently the neighbor upstairs has a wall-mounted AC Unit in his bedroom with a chiller which is ultimately the source of this problem. The neighbors wall and floor directly beneath the AC unit is also saturated with moisture(pic 2,3 to follow). My question is (finally) can condensation be the source of so much water in both apartments or a potential leak in the equipment? We were not able to check pipes because they were not accessible but there is water everywhere and actively dripping....
 
Re:Air Conditioning and moisutre problems (pic1) rbushee 1/17/2008
Yes the condensation can cause the problem that you are seeing. The main thing that I would look for would be a plugged drain on the unit.
 
Re:Air Conditioning and moisutre problems (pic1) solution 1/21/2008
Here is a pic. of the neighbors (upstairs) wall right beneath the wall mounted AC unit. We can see a large amount of water present right below the unit....is it possible that there is so much surface condensation?
 
Re:Air Conditioning and moisutre problems (pic1) solution 1/21/2008
OOps wrong pic....these smokers.....
 
Re:Air Conditioning and moisutre problems (pic1) Woodbury IR 2/5/2008
Yes, and the source of the moisture could be condensation from a poorly insulated air handler cabinet or condensate drain line assembly. We see lots of condensation damage in the tropics from poorly insulated surfaces that sweat in hot humid climates.

To determine potential condensation sources, measure the ambient humidity and temperature. Use your dew point alarm feature on BW palette, and away you go.
 
Re:Air Conditioning and moisutre problems (pic1) WesC 2/6/2008
solution wrote:
, I took a quick thermal image of a friends apt. who's ceiling in the master bedroom is full of moisture (pic1) Apparently the neighbor upstairs has a wall-mounted AC Unit in his bedroom with a chiller which is ultimately the source of this problem. The neighbors wall and floor directly beneath the AC unit is also saturated with moisture(pic 2,3 to follow). My question is (finally) can condensation be the source of so much water in both apartments or a potential leak in the equipment? We were not able to check pipes because they were not accessible but there is water everywhere and actively dripping....
Yes condensation can produce a tremedous amount of water.
 
Re:Air Conditioning and moisutre problems (pic1) solution 3/26/2008
Hey Guys,

After about 2 months of tryng to resolve here are the updates:
1) We disconnected the drain on the a/c unit in the upstairs apartment to see how the water damage would develop downstairs
2) we repaired a hot water supply pipe in the vicinity of the damage just in case this was the cause

We did this to try and eliminate causes of problem and trying to establish wether or not condensation was the cause.

After these two courses of action, the water damage in the apt below has been very inconsistent. There have been days when it is dry and days when it is damp again. Also the damage has changed in shape and has migrated (pic attached) A lot of the original wet, damaged area has completely dried off and now the damage has moved, although it still appears as on big area. Specially the area near the recessed lights installed in the gypsum seen in the pic 1 on the original post.

Questions:
1) To finally determine whether or not it is condensation, should we apply the dew point alarm on the damaged surface? Maybe the condensation is in fact coming from above and filtering down or maybe it is the same apartment and its a/c use that is causing condensation on the concrete ceiling slab. Should we use the dew point alarm in the damaged apt. with the a/c operating or not?
2) Are there signature damage patterns than can help us determine whether is is condensation or a leak from another source (which we highly doubt)
3) If it is in fact condensation, what are the best reccomendations (ie vapor barrier, moisture barrier) that we can give our clients to minimize future damage.
4) We performed took the courses of action above to see how the concrete ceiling would develop. Is it possible that the cause was in fact the drain pipe and the ceiling continues to be wet because it is "drying out"? How much time can it take for a concrete slab to dry out? We are approaching 2 months.

I am attaching an updated pic of the damage so you can see how it has changed in shape and intensity.

Thanks
 


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