Guest guest Posted March 18, 2010 Report Share Posted March 18, 2010 Dear Colleagues:I was asked my opinion about the following: http://www.bekzon.se/bia-q-techIam very suspicious but have nothing to base my concerns on.Does anyone have anything specific to contribute. Life Energy Associateswww.LifeEnergyAssoc.com20 Darton StreetConcord, MA 01742 chilled water pipe info Hello Everyone, Hope you are all doing well, I need a favor with a little help please! I have a project and need some chilled water pipe info. The individual room unit (Whalen a/c -- heater combo units) uses central supplied chilled water pipes. (note, the hvac unit is not a source of the problems) In a wall cavity between two studs, the pipes are 2 lines parallel, run up and down (in and out of unit). They were wrapped with insulation (pre-formed yellow fiberglass with white wrap), then the cavity was filled with white batt fiberglass, unfaced, both sides of cavity are drywall. Remember, the metal cabinet (cold) is right up against this drywall. There is mold on the white coating on the pipe wrap, same as we often see on wrapped pipe in many locations, but usually it's open to the air, not covered by additional insulation in a cavity. There is no discernable reason for this - that I can find -- yet. The copper pipe inside is corrosion free, no drips, the interior of the drywall is relatively clean. The batt insulation is present, and other walls do not exhibit a mold problem - except where we have infiltration of outside air (see below). Wherever the pipe penetrates a hole in the wall, there is small amount of accumulated mold and moisture damage (lack of proper wrap on the pipe, insul stopped at wallboard!), about 1-3 inches around the opening, from classic sweating pipe. One of the two wrapped pipes has more mold; it may be the cold(er) supply line, I do not have drawings to confirm which is which. ADD: the other problems in the building are like southern clime problems, or typical motel problems. On the exterior walls they have lots of outside air infiltration through many openings and cracks (from both design and construction flaws). Wherever the cold a/c metal cabinet was adjacent to drywall and there was outside infiltration into the cavity, we reached dewpoint and have mold growth on both sides of drywall. The partition wall with the chilled water pipes is attached to the exterior wall (via "T"). The framing and studs are metal with usual pre-cut holes, allowing air (vapor) to pass from cavity to cavity. Any ideas? if so, any reference to support or figure this out. I can not go back to collect more data, I have good photos if anyone needs. Sincerely thank you in advance. I wouldn't ask if it wasn't important to me. Armour Quote Link to comment Share on other sites More sharing options...
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