Heat Recovery Ventilator (HRV) vs Energy Recovery Ventilator (ERV)
- HRV focuses on retaining indoor warmth, acting as a guardian against heat loss, especially in cold winter months.
- ERV not only recovers heat but also manages energy transfer, making it versatile for regions with diverse climates, including both cold winters and hot summers.
Humidity Control:
- HRV excels in moisture management primarily for heat recovery.
- ERV specifically addresses humidity levels, preventing indoor air from becoming excessively dry in colder climates and regulating humidity in warmer climates to avoid muggy conditions.
Ideal Use Cases:
- HRV is best for homes in colder climates dominated by winter.
- ERV is ideal for homes facing cold winters and hot summers, adapting to shifting climate dynamics.
In essence, HRV focuses on winter heat recovery, while ERV offers a year-round solution by managing heat and humidity in regions requiring humidity control.
How Much Ventilation Do I Need?
For continuous indoor air quality ventilation, a heat or energy recovery ventilator (HRV or ERV) should provide 0.35 air changes per hour. This calculation must consider the complete occupied volume of the house.Utilizing an online CFM calculator can assist in establishing the size of your unit.Once you have identified your CFM needs, seek HRV or ERV units that meet or surpass this capacity. It is advisable to seek guidance from an HVAC specialist to ensure the selection of the correct unit size.
