Energy Recovery System (ERV / HRV)
An important lesson learned from the covid-19 pandemic is the need of oxygen for our health.
Fresh clean natural outdoor air consists of 20.9% of oxygen. In an air-conditioned space, cooling is done by recirculating most of the air, resulting in a harmful level of carbon dioxide, carbon monoxide, and volatile organic gases. Organic gases found in indoor air, such as formaldehyde, benzene, etc are carcinogenic. Higher-level these harmful gases will affect the health of occupants.
As per ASHRAE’s recommendation introducing clean outdoor air is an important and necessary part of indoor air quality.
If more outdoor air is pumped into indoor air-conditioned space, cooling requirements increase!
Solution: Introduce Fresh Air through Energy recovery System.
Heat recovery ventilation (HRV) / Energy recovery ventilation (ERV)
Indoor air-conditioned air is flushed through an energy recovery heat exchanger to recover the cooling energy and outdoor fresh air is drawn through the other side of the energy recovery heat exchanger.
This process saves wastage of energy while flushing a part of contaminated air.
Two types of energy recovery systems.
1. Heat recovery ventilation (HRV): Only cooling energy is recovered.
2. Energy recovery ventilation (ERV): cooling energy & moisture from the exhaust air is recovered.
Heat recovery ventilation (HRV): Compact ceiling suspended unit.
Energy recovery ventilation (ERV):
