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    Project Name           PHIUS+ Climate Data                
    Project #           Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec  
      Ambient Temp (°F)  
      Dewpoint (°F)  
    ASHRAE 99% Design Temperature [oF]                                                                           
    CONDENSATION RISK                COMFORT REQUIREMENTS              
    ISO 13788 Calculation for Low Thermal Inertia Elements        Applies to all projects.                       
Is this a Heating Climate?
Windows >10' in height and above have the same required U-value. 
Use simple method for indoor humidity?
High occupancy?
Please input humidity class here
1. Unoccupied buildings, storage of dry goods
2. Offices, dwellings with normal occupancy and ventilation
3. Buildings with unknown occupancy
4. Sports halls, kitchens, canteens
5. Special - laundry, brewery, swimming pool…
U-value of window frame/glass [BTU/hr.ft2.F]
Window Vertical Height (ft) - Use slider
    Safety Factor   
It's a good idea to design with a safety margin.
Default = 15%
      Required Whole Window U-value [BTU/hr.ft2.F]  
Interior Surface Temperature of window frame/glass [oF]
Risk of condensation on interior surface acceptable?
Critical fRsi
Critical Month 
    Critical CRF Rating