Insulation/ CALCULATOR
Ventilation heat loss
Estimate the heating load associated with outdoor-air ventilation and heat recovery.
Use the design or measured outdoor-air rate.
The indoor heating setpoint.
The outdoor design condition for this estimate.
Use a tested value appropriate to the operating condition.
Use equivalent hours at the entered average temperature difference, not automatically the full heating season.
Cost of one delivered kWh of heat from the actual heating system, in any currency.
Load without heat recovery
1.25 kW
Load after heat recovery
0.31 kW
Heating load avoided
0.93 kW
Seasonal heat after recovery
935 kWh
Seasonal heat avoided
2,804 kWh
Estimated seasonal cost avoided
336.47 currency
Interpretation:Across the entered equivalent hours, heat recovery avoids about 2,803.95 kWh of heating and 336.47 cost units. Fan energy and defrost are not included.
Constant dry-air properties, balanced airflow, sensible heat only and the entered equivalent operating hours. Fan electricity, infiltration, defrost, leakage, humidity, changing weather, heating-system efficiency changes and equipment performance changes are excluded.