What is erv in hvac?

ERV, or Energy Recovery Ventilation, is a technology used in HVAC systems to improve indoor air quality and energy efficiency. It works by exchanging stale, indoor air with fresh, outdoor air while simultaneously transferring heat or moisture between the two air streams.

ERV units contain a heat exchanger that allows for the transfer of temperature and humidity between the incoming and outgoing airflows. This helps to reduce the energy needed to pre-heat or pre-cool the outdoor air before it enters the building, leading to lower heating and cooling costs.

ERV systems are particularly beneficial in climates with extreme temperature variations, as they can help maintain a more consistent indoor temperature and humidity level. They also help to remove pollutants and allergens from the indoor air, improving overall indoor air quality.

Overall, ERV systems are a valuable addition to HVAC systems, providing energy savings, improved comfort, and better indoor air quality for building occupants.