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  • Users: urgross
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  1. urgross

    Flame/Smoke Rating of Insulation

    Good afternoon, I am asking the same question in the HVAC and Fire Protection, but no one had an answer, other than telling me to read NFPA until I find something. I could not find such a reference by reading the 1.3 paragraphs for applicability. I queried the NFPA query site, response is that...
  2. urgross

    I entered the following on the HVAC

    I entered the following on the HVAC, no answer was available. Maybe here as it is (or could be) an NFPA issue. I am working on replacement of steam lines in a campus setting. Decision was made to go with a pre-engineer system. I am having a problem selecting proper NFPA for E84 requirements...
  3. urgross

    Insulation on Steam Pipe for Distributionin Tunnel

    Hopefully this will be easy. I am working on specifications for steam pipe going through direct burial, shallow trench, and walk-on tunnel. One section is for fire/smoke rating. A guide spec has been provided for both air conditioning and ventilation of HVAC systems under Division 23, and...
  4. urgross

    Has anyone here have experience usi

    Has anyone here have experience using Rawal APR valves for humidity control?
  5. urgross

    Opinions (and facts) is wanted.

    Opinions (and facts) is wanted. I've been assigned to deciding how to replace or repair a geothermal (GSHP) for supporting a 30,000 SF warehouse. I've been discussing whether to install 17 additional wells (additional wells to supplement well design, all but 14 of the wells pooped out at 120')...
  6. urgross

    Duct Cleaing in Health Care Facilities

    Does anyone know of a specific code or standard that requires routine cleaning of OR, ER or other healthcare facility duct? I've checked through NFPA, AIA, ASHRAE, SMACNA, GGI and the only thing I can find is that the duct must be designed and constructed to readily facilitate inspection and...
  7. urgross

    PermaFrost NMR and IceCOLD

    I've seen prior threads for IceCOLD, which did not exactly provide shining references for its usage. Does anyone here have knowledge or experience using Permafrost NMR? Comments or experience with IceCOLD, PowerKnot, or Permafrost, especially any listing of third party laboratory testing to AHRI...
  8. urgross

    Interstitial Space

    I am starting on design for replacement of interstitial HVAC support space for a hospital, and have run into a problem at the onset: for U.S., State, Local and Federal complaince, I can find no basis or criteria for design. nearest thing located, which does not appear to be in ASHRAE or NFPA...

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