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  1. axlegrinder

    Perforated Duct Sizing

    Does anybody have any design guidelines for perforated sprial duct. I recall that it is similar in design philosophy to gas burners, ie. even flame hieght along length, but I would like to know if there is specific criteria tying together - duct diameter - pressure drop per unit length along...
  2. axlegrinder

    Yoga Studio

    I am renovating a room into a yoga studio that requires a room temp of 100 degrees F. Its called a hotbox. The room has a existing rooftop unit, however the burner is larger than required. If I return air through the rooftop unit, [the burner has a delta T of 65 deg. F], the discharge temp...
  3. axlegrinder

    Overloading Chiller

    I am being asked to bless the use of 90T chiller for an extension to a retirement home. The unit is a York 90T 2 reciprocating compressor with a water cooled condenser. I want to add about 40T load to this chiller. I believe the chiller is currently operating between 40 and 60T. My question...
  4. axlegrinder

    No Loss Stack

    I showed a manufacturer a picture of a stack (24" dia. and 30 ft. high) that I am tring to replicate and he told me it was a No Loss Stack, but couldn't provide me with any furhter info (ie. manufacturers etc). Has anybody heard of this and could you provide me with some leads?

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