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constant vs variable volume
I'm used to designing variable volume systems. I have a food production facility with a warehouse/loading dock side of house, a large area with a lot of steam being used, and another large area with a lot of sensible heat on one side of the room - an area with insulated, cold equipment - and...- ACD1
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- Replies: 2
- Forum: HVAC/R engineering
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Selecting perimeter zone slot diffusers
Seems to me that there is no consensus on this one. I'm selecting slot diffusers for an exterior zone with a large amount of glass. In addition, the ceiling height is 8'-6", with occupants sometimes directly up against the glass. ASHRAE (I think it's in "Systems and Equipment") says to select...- ACD1
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- Replies: 2
- Forum: HVAC/R engineering
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AHU testing and unit pressure profile
What do you typically look out for when looking at the pressure profile of a unit? I have a pressure profile for an existing unit that - during testing - generated a much lower pressure than expected at the intake of the unit. The pressure measured was substantially more negative than the...- ACD1
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- Replies: 4
- Forum: HVAC/R engineering
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HVAC reheat coil selection priorities
I am trying to become better at hvac coil selection. I've recently run into situations where compromises have to be made, and I'm unsure of what my priorities should be in the final selection. I was trying to select a heating coil for an FCU with approximately 4,000 cfm, EAT=55, LAT=85. I had...- ACD1
- Thread
- Replies: 7
- Forum: HVAC/R engineering
