Energy Recovery Ventilator Sizing

Size energy recovery ventilators (ERV/HRV) and calculate energy savings from heat and moisture recovery.

Design outdoor air ventilation rate.
CFM
Sensible heat recovery effectiveness (0.5-0.85).
Moisture recovery effectiveness (0.4-0.75, 0 for HRV).
Design outdoor dry bulb.
°F
Design indoor temperature.
°F
Outdoor humidity ratio (0.01-0.02 typical).
lb/lb
Indoor humidity ratio.
lb/lb

Results

Sensible Heat Recovery-BTU/hr
Latent Heat Recovery-BTU/hr
Total Heat Recovery-BTU/hr
Cooling Capacity Saved-tons
References: ASHRAE Standard 90.1 Section 6.5.6: Energy Recovery; ASHRAE Handbook - HVAC Systems and Equipment Chapter 26