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PHIUS WINDOW COMFORT & CONDENSATION RISK
ASSESSMENT
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Project Name
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PHIUS+ Climate Data
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Project #
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Month
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Jan
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Feb
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Mar
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Apr
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May
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Jun
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Jul
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Aug
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Sep
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Oct
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Nov
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Dec
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State
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Ambient Temp
(°F)
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City
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Dewpoint (°F)
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ASHRAE 99% Design Temperature [oF]
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http://ashrae-meteo.info/
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CONDENSATION RISK
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COMFORT REQUIREMENTS
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ISO 13788 Calculation for Low Thermal Inertia
Elements
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Applies to all
projects.
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Is this a Heating
Climate?
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Windows >10' in
height and above have the same required U-value.
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Use simple method for
indoor humidity?
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High occupancy?
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Please input humidity
class here
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U-value of window
frame/glass [BTU/hr.ft2.F]
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Window
Vertical Height (ft) - Use slider
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Safety Factor
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Required Whole Window U-value [BTU/hr.ft2.F]
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Interior Surface
Temperature of window frame/glass [oF]
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Risk of condensation on interior surface
acceptable?
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Critical fRsi
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Critical Month
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Critical CRF Rating
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