UFAD Cooling Load Design Tool

Input

Plenum Configuration
Interior Perimeter Unit Symbol
Room Height ft H
Floor Area ft2 Af
Floor Level - -
Diffuser Type
- -
Diffuser Length in -
In-floor Cooling Unit Capacity kBtu/hr Wunit
Number of Diffusers - n
Design Cooling load for Overhead System kBtu/hr WOH
Design Average Temperature in the Occupied Zone °F Toz,avg,d
Estimated Category 2 Leakage cfm/ft2 qleak,2
Setpoint Temperature of Air Entering the Supply Plenum °F Tplenum
Number of Occupants - m
Window Blinds - -
Zone Orientation - -
Exterior Wall Length ft Lp
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Results

Interior Perimeter Unit Symbol
Airflow (through diffusers) - - cfm Q
Airflow (through diffusers & leakage) - - cfm Qroom
Air Distribution Effectiveness - - - Ez
Diffuser Discharge Temperature - - °F TS
Air Temperature at 4 in. Height - - °F T4
Setpoint Thermostat Air Temperature (at 48 in.) - - °F Tset
Air Temperature at 67 in. Height - - °F T67
Return Air Temperature - - °F TR
Return Plenum Air Temperature - - °F TRP
Average Temperature in the OZ - - °F Toz,avg
Temperature difference between the head (67in) and ankle (4in) - - °F ΔToz
Airflow per area (through diffusers) - - cfm/ft2 Q
Airflow per diffuser - - cfm/diff. Q
Design airflow per area (through diffusers & leakage) - - cfm/ft2 Qroom
Design Cooling Load Calculated for a Overhead (mixing) System - - W WOH
UFAD Cooling Load Ratio (UCLR) - - - UCLR
Supply Plenum Fraction (SPF) - - - SPF
Zone Fraction (ZF) - - - ZF
Return Plenum Fraction (RPF) - - - RPF
UFAD Cooling Load - - W W
UFAD Cooling Load per Area - - W/ft2 W
Supply Plenum Cooling Load - - W -
Supply Plenum Cooling Load per Area - - W/ft2 -
Zone Cooling Load - - W -
Zone Cooling Load per Area - - W/ft2 -
Return Plenum Cooling Load - - W -
Return Plenum Cooling Load per Area - - W/ft2 -
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