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Chiller Type

Specially Designed AHU
Every Custom Air Handling Unit starts with a list of design parameters that must be answered. If these items are explored and discussed early on it makes for a significantly better design. Here are the key items that we look for in preliminary Custom Air Handling Unit design.
Project Scope:
Physical Data:
  1. Dimensions
  2. Weights
  3. Access
  4. Rigging
  1. All Aluminum Construction? Stainless Steel Interior Sections?
  2. Architectural Considerations - Special Coatings?
Operational Data:
  1. Constant Volume (CV) or Variable Air Volume (VAV)?
  2. Standard Unit or Energy Recovery?
  3. 100% Outside Air (OA) or Mixed Air
  4. Draw through or Blow through
  1. Cooling Type (Chilled Water, DX or Heat Pump)
  2. Heating Type (Hot Water, Steam, Gas or Heat Pump)
  3. Filters; pre & final filters, HEPAs, carbon filters?
  4. Humidification - steam, adiabatic?
  5. UVC lighting?
  6. Lighting package?
  7. Controls package?
  8. Testing?
Design Parameters
  1. Supply CFM
  2. Return CFM
  3. Minimum Outside Air (OA) CFM
  4. Exhaust CFM
  1. Supply
  2. Return
  1. Outside Air (OA) db/wb
  2. Return Air (RA) db/wb (space condition)
  3. Supply Air (SA) db/wb
This is a start. These are base questions that begin the process. There are 100's of options on Custom AHU's. If more information is provided in early stages of design, the process moves quicker and unit design is significantly enhanced.
Additional features:
  1. AHU with heat recovery (wheel type/ Plate type cross flow/ Heat Pipe).
  2. AHU with VFD (variable frequency drive)
  3. AHU with EC Fan
  4. AHU with Plug Fan
  5. AHU with PHI cell / Chemical filters for maintaining IAQ.