Heat Recovery Ventilation Cost Estimator  
  Cost per therm of heating fuel  
       
  Cost per BTU of heating fuel  
       
  Full Speed CFM of Exhaust  
       
  Full Speed CFM of Supply  
       
  Hours Per Day of Run Time  
       
  Hours Per Year of Run Time  
       
  Air Leakage in CFM per year due to unbalanced flows  
       
  Average Indoor Temperature  
       
  Average Outdoor Temperature  
       
  AFUE of Heating Appliance  
       
  Average difference between inside and outside temperature  
       
  Pounds of Air Leakage over 1 year  
       
  BTU required to raise 1 year of air leakage 1 degree  
       
  BTU required to raise 1 year of air leakage average temperature difference between inside and outside  
       
  Total BTU adjusted for AFUE  
       
  Cost of Unbalanced Flows  
       
  HRV Efficiency  
       
  Cost of HRV Efficiency  
       
  KWH electrical costs  
     
  Amp Draw of HRV Motor at full speed  
       
  Electrical cost of running HRV  
       
  Total operational Cost of HRV  
       

Wisdom & Associates, Inc.
www.WisdomAndAssociates.com