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  1. danmsnyder

    Transfer fans usage in commercial bldg

    HI, I don't think it is an efficient way to cool an adjacent room. Especially since you have no issues with fire walls. The only possible reason would be if there is not enough static pressure in the duct to push the air into the room. This what fan powered VAV boxes are for. Consider the...
  2. danmsnyder

    Precision AC for IT Server

    I don't have any info on Precision Systems, but I would go with the dual fluid if that means 2 cooiling loops, for redundancy. I would also recommend 100% redundancy for the critical areas, which the IT department would say is everywhere. Each unit sized for 100% of the load. We maintain a...
  3. danmsnyder

    Fresh Air Exchanges

    ChasBean1 - You're absolutely right. But of course maintenance is they key to every design! Too many engineers specify bells and whistles and have no concept of what's involved in maintaining them. I would recommend a semi-annual calibration. Also you need a good contractor to know what...
  4. danmsnyder

    Fresh Air Exchanges

    If I were you I would install CO2 monitors in each AHU. They usually cost about $200 a piece and will more than likely pay for themselves the first year. The Outside Air requirement is for the the volume or the number of people. I doubt that the library is at 100% for every minute of its...
  5. danmsnyder

    Harmonic Distortion

    I am a facilityt engineer in Newtown, Pa. After moving into our NEW building, many 277v, T8 electronic ballasts were found to be bad, about 15 out of 300. Since September, about 20 more have gone bad. It's a commercial office building, 30,000 sq. ft., with about 50 computers. There is a...

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