Heat Recovery Ventilation Cost Estimator   Exhaust Only Ventilation Cost Estimator   Fuel Type Cost per Unit Cost per Therm  
Cost per therm of heating fuel   Cost per therm of heating fuel   Natural Gas -per CCF  
                   
Cost per BTU of heating fuel   Cost per BTU of heating fuel   Oil - per gallon  
                   
Full Speed CFM of Exhaust   CFM of Exhaust   Electricity - Per KWH  
                   
Full Speed CFM of Supply         Propane - Per Gallon  
                   
Hours Per Day of Run Time   Hours Per Day of Run Time          
                   
Hours Per Year of Run Time   Hours Per Year of Run Time          
                   
Yearly air leakage from unbalanced flow   CFM of Exhaust per Year          
                   
Average Indoor Temperature   Average Indoor Temperature          
                   
Community              
Average Outdoor Temperature   Average Outdoor Temperature          
                   
AFUE of Heating Appliance   AFUE of Heating Appliance          
                   
Average difference between inside and outside temperature   Average difference between inside and outside temperature          
                   
Pounds of Air Leakage over 1 year   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 1 degree          
                   
BTU required to raise 1 year of air leakage the average temperature difference between inside and outside   BTU required to raise 1 year of air leakage the average temperature difference between inside and outside          
                   
Total BTU adjusted for AFUE   Total BTU adjusted for AFUE          
                   
Cost of Unbalanced Flows   Estimated Cost of exhausted air          
                   
HRV Efficiency                
                   
Cost of HRV Efficiency                
                   
KWH electrical costs   KWH electrical costs          
               
Amp Draw of HRV Motor   Amp Draw of Exhaust Fan          
                   
Electrical cost of running HRV   Electrical cost of running fan          
                   
Total operational Cost of HRV   Total operational Cost of Exhaust Only Ventilation System   Savings per year    
            Cost Difference Between Systems    
            Payback Period Years    
                   

Wisdom & Associates, Inc.
www.WisdomAndAssociates.com