Phius Window Comfort & Condensation Risk Assessment Tool v3.6  
    Requirement met.  
      Required dropdown menu inputs. Requirement not met.  
      Calculated from another sheet. Threshold  
               
  Project Name    
  Project #    
 
Copy and paste name used in WUFI is recommended. Window Label
   
  State  
 
  Climate Location  
 
               
  CONDENSATION RISK        
  ISO 13788: Low Thermal Inertia Elements   
   Input Data: Fenestration Type  
 
  Class 2 typical    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…
 
      BTU/hr.ft2.F  
    Safety Factor   
It's a good idea to design with a safety margin.
Default = 15%
 
   Result: Risk acceptably low?    
Fenestration Condensation Risk is too high according to ISO 13788. Alternate compliance method may be used. Review Section 3.3.2 of the Phius Certification Guidebook.
   Additional Instruction: The critical (lowest) allowed fRSI & CRF are noted below.  
 
The temperature factor (fRSI) is the difference between the interior surface temperature of a component and the exterior air temperature, related to the difference of temperature between interior air and exterior air. The higher the temperature factor, the better. A low factor indicates a low room-side surface temperature. Critical fRsi
   
 
The Condensation Resistance Factor (CRF) is comparable to AAMA 1503 Condensation Resistance Factor (CRF), NFRC 500-2020 Condensation Resistance and CAN/CSA A440.2 Temperature Index. The higher the number, the better. Critical CRF Rating
   
  Exceptions:          
  1. Pet doors are not required to pass the condensation resistance test.    
2. Exterior doors with ADA, egress, fire rating requirements may use the uninstalled whole door U-value.
               
  COMFORT REQUIREMENTS        
  Applies to vertical fenestration in all project types.        
  For stacked windows, include the full height of all mulled windows.      
  Windows >16' in height have the same U-value requirement as 16' tall windows.    
  Window Vertical Height     ft    
  Required Whole Window U-value*     BTU/hr.ft2.F    
  * Uninstalled whole window U-Value used. Do not include frame-to-wall psi-value for compliance.  
  Exceptions:            
  1. Windows in non 'regularly occupied' areas have no comfort requirement.    
  (ie. Entry lobby with no seating or corridors with only transient occupants.)    
  2. ADA doors have no comfort requirement.        
  3. Review Appendix N-4 of the Phius Certification Guidebook for additional exceptions.    
               
 
         
    Phius Climate Data
Average Monthly Temperatures [°F] 		     
         
    Month Ambient Dewpoint      
    Jan      
    Feb      
    Mar      
    Apr      
    May      
    Jun      
    Jul      
    Aug      
    Sep      
    Oct      
    Nov      
    Dec      
    ASHRAE 99% Design Temperature [oF]          
2017 ASHRAE Handbook - Fundamentals (IP)
http://ashrae-meteo.info/
    Interior surface temp. [°F]         
    Critical month         
The temperature factor (fRSI) is the difference between the interior surface temperature of a component and the exterior air temperature, related to the difference of temperature between interior air and exterior air. The higher the temperature factor, the better. A low factor indicates a low room-side surface temperature. Critical fRsi
The Condensation Resistance Factor (CRF) is comparable to AAMA 1503 Condensation Resistance Factor (CRF), NFRC 500-2020 Condensation Resistance and CAN/CSA A440.2 Temperature Index. The higher the number, the better. Critical CRF Rating