AHU
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Project / document details
These fields appear in the PDF output.
Step 1
Key Design Conditions & Plant
Summer outdoor
°C
°C
%
Winter outdoor
°C
°C
%
Room condition
°C
%
±°C
±%
Occupancy
people
Chilled water
°C
°C
K
%
LPHW
°C
°C
K
Cooling Coil
–
Step 2
Airflows
m³/s
m³/s
%
m³/s
m³/s
m³/s
%
Design supply flow (incl. margin)
–
m³/s
Design fresh air (incl. margin)
–
m³/s
Design exhaust air (incl. margin)
–
m³/s
Step 3
Cooling Coil Sizing (Summer / Dehumidification)
Latent load
Total cooling duty
–
kW
CHW flowrate (incl. glycol)
–
kg/s
CHW pipe size
–
mm
Step 4
Summer Reheat Coil
Off-cooling coil temperature
–
°C
Off-cooling coil temp after fan pick-up
–
°C
Reheat type
Minimum Reheat off-coil temperature
–
°C
Design Reheat off-coil temperature
°C
Reheat coil load
–
kW
Reheat water flowrate
–
kg/s
Reheat pipe size
–
mm
PLOT
Summer psychrometric process
Simplified T–w charts (101.325 kPa). Click Plot Chart to generate; click Replot if inputs change.
Figure 1: Summer psychrometric process
Legend
Psychrometric data at plot points
Step 5
Winter Preheat Coil & Heat Recovery
Outdoor air dry-bulb TOA (winter)
–
°C
Frost protection setpoint
°C
Preheat required?
–
Step 6
Winter reheat (upstream of humidifier)
°C
°C
°C
Resolve the Step 5 frost / preheat issue before sizing winter reheat.
Winter reheat duty
–
kW
LPHW flowrate
–
kg/s
LPHW pipe size
–
mm
Step 7
Winter Humidification
°C
%
%
Room Moisture Content
–
kg/kg
Outdoor air moisture content
–
kg/kg
Humidifier required?
–
Humidifier duty
–
kg/hr
PLOT
Winter psychrometric process
Simplified T–w charts (101.325 kPa). Click Plot Chart to generate; click Replot if inputs change.
Figure 2: Winter psychrometric process
Legend
Psychrometric data at plot points
Output
Psychrometric Analysis & Coil Sizing Report
Generate a professional PDF report with all calculations and psychrometric charts.