AMBRIDGEPORT
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PAGE 13 - CRAH - GUARDIAN SERIES
HOW TO SELECT
THREE NUMBERS SIZE THE UNIT. 
ONE DATE SHIPS IT.
Match the hall to a Guardian model with sensible load (kW), airflow (CFM) and entering water 
temperature. The factory issues the certified selection — and a firm ship date against secured 
fan, coil and controls supply.
MODEL NOMENCLATURE
AH - CRAH - 400 - CW
AH Air handler | CRAH Computer room air handler
400 Nominal capacity class (kW) | CW Chilled water
CWC / VT Cased custom / vertical upflow
F· / EC / HFI Fan count | EC motors | AFE harmonic filter
WORKED EXAMPLE
A 400 kW, 60,000 CFM data hall > Guardian FA AH-
CRAH-400-CW: (6) Infinitum EC fans with AFE, 
63,000CFM @ 2.5” ESP, 1,400 MBH net sensible at 
50°F EWT, (2) 6-row CW coils, single-point Victaulic or 
flanged connection.
WHY THE DATE HOLDS
HOW TO ENGAGE
REFERENCES
Fans, coils and controllers are the three 
long-leads that stall CRAH schedules. 
All three are secured under allocation 
and  multi-OEM agreements before your 
PO exists.
Send load, airflow, EWT and footprint.
Budget selection and pricing returned, 
then submittal package and release 
for production.
Program references available on request 
through your Cambridgeport 
representative.

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