ZoneOrNot™ - Zoning Calculator version 1.0
Enter and adjust the values in the blue boxes, optional values in yellow. Click the "Udate" button for the results.
  Total Sensible BTU/HR       Blower   Design Temp. °F     Temperature deviation
Design cfm = Loss Gain   HF CF   CFM   Winter Summer      needed to trigger zoning
35,578 33,907   0.0394 0.0413     70 75     °F  
                   
    Avg.          
  SENSIBLE BTU/HR   CFM   Design   CFM difference   Temp. Deviation (°F) estimated
Zone/Room Name loss gain   Heating Cooling   CFM   winter summer   winter summer  
  395 691   543   +37% -21%   +2.6° +2.0° Consider installing a damper that can close in the winter when the room gets too warm
  1005 709   857   -15% +21%   -1.0° -1.3° No Zone damper needed
       
       
       
       
       
       
        Total Design CFM        
      1400            
             
 
 
           
Humidity affects our comfort more than the sensible temperature. That said, many people cannot discern a two degree fahrenheit difference, but more than three degrees can be noticeable. Open floor plans and open doors can allow temperatures to equalize on their own. When this is not the case, this program can calculate the temperature deviation from design and alert to the need for zoning dampers. Use Average, Heating, Cooling, or Adjusted Max for zoning and/or air balancing. Maximum cfm is for sizing the duct. Temperature deviation is calculated from the percentage difference in the heating and cooling cfm and the selected design cfm.