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Ivan Laguna

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  • NRC relation to STC

    Hello All, I am having trouble understanding this practice question: Materials & assemblies with high NRC generally have low STC rating.  Is that because materials/assemblies with high NRC are abso...

  • Low or high balance point temperature

    Can someone provide a clear explanation as to why Interior load dominant buildings have a low balance point temperature? I can't seem to wrap my mind around the concept. If the exterior balance poi...

  • PPD - Failed Twice

    Hi Everyone, I just failed my second attempt at PPD and not sure how long to study for and try at my last try for the year. I am trying to stay positive, but the fear of having to wait until next J...