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  1. apollowolfe

    Economizer, reheat coil and preheat coil.

    1) You would utilize the economizer in that situation. The heat coil would activate when you are bringing in the minimum required outdoor air and your leaving air temperature is below desired. 2)The preheat coil is utilized to raise outdoor air above freezing in hydronic units. In a cold...
  2. apollowolfe

    Drum Hood Vent Flow Design

    I attached an image from the ACGIH Industrial ventilation manual. Variables: Q = flowrate CFM h_e = overall hood entry loss VP_s = slot velocity pressure VP_d = duct velocity pressure
  3. apollowolfe

    Replacing oversized equipment?

    I never went on site the lead went and took a few pictures that did not allow me much to reference. This site is in Tennessee. I do have a lot of field experience because I did building inspections for military hospitals across the US for three years. So, I have a good grasp on what to expect...
  4. apollowolfe

    Replacing oversized equipment?

    Ultimately, I do not see this project as up for debate because my lead stamped it so that is his issue. I am just trying to use this as an example to learn best practices. I utilized Trane Trace for my load calcs, and I was generous with the internal load allotments. One of the less than 100SF...
  5. apollowolfe

    Replacing oversized equipment?

    I am not concerned with getting a solution to this older project, but was using it as an example. My question is generally what would you do in a situation where you have to replace an existing VAV AHU system with over twice the required capacity? Is it acceptable to replace with same capacity...
  6. apollowolfe

    Replacing oversized equipment?

    My lead does not has much experience, and I am not confident with some of the stuff he says. On this instance he said he ran a calculation and it was very low so he just wanted to defer to what was existing. It seems like installing equipment more than double the necessary load does not follow...
  7. apollowolfe

    Replacing oversized equipment?

    Hello, I have not been in the industry very long and wanted some feedback on a design that took place at work. We had about a 9,000 SF single floor office building in Tennessee with no major loads. The original equipment was a 24,000 CFM AHU and a 60-ton air-cooled chiller. The client wanted to...

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