HVAC CONDENSATION PROBLEM?

Oct 29

we have chilled water line 40 schdule pvc pipe 3" with Foam Insulation of 3"x thickness 1 1/2" under the falceling. our chilled water temp is 8 degree ferenheight.In rainy season why we have condensation on it." in Yahoo

The "R" value of your insulation is too low.

Heat tape ~and~ insulation?

Filed under: Foam Pipe Insulation

3 Responses to “HVAC CONDENSATION PROBLEM?”

  1. rottendog93, on October 30th, 2009 at 3:28 am Said:

    The "R" value of your insulation is too low.
    References :

  2. billh, on October 30th, 2009 at 3:59 am Said:

    your "chilled" water is 8 F? there is your problem right there, the normal rules of physics don’t appear to apply where you are. Water at 8 deg F has a special name, it is called ice. I would assume you meant to say 8 deg C. it sounds like you need more efficient insulation
    References :

  3. ?, on October 30th, 2009 at 4:45 am Said:

    This sounds like your chilled water line is extremely low. If this used in a process where 8 degrees is the norm, it then is a matter of dew point. If the exterior of the insulation is cold, below dew point temperature, you will form condensation, perhaps even ice if it’s bad enough. In the rainy season, the dew points run very high, perhaps above 70 degrees. You will either need to lower the dew point in that area, or add more insulation to the pipes. Hope this helps.
    References :

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