What is ERV

Energy Recovery Ventilator
An Energy Recovery Ventilator (ERV) is a type of energy efficient mechanical Ventilation System that utilize energy recovery technologies (erv plate core, rotating wheel etc.) to recover both heat and moisture from air. The ERV system's equal flow removes stale air from the inside while allowing filtered fresh air into the house while improving indoor air quality. The warm and humid outside air is pre-cooled and dehumidified in the summer by the energy of the cool indoor air leaving. In winter, outdoor air (cold & dry) is pre-heated and humidified by energy from the outgoing warm air of the room. This is a method where you can keep a comfortable environment to live keeping the usage of HVAC equipment and energy use low.

One of the biggest advantages of an ERV system is an efficient use of energy with virtually no loss of energy so that both your air conditioning system and your ventilation equipment are not working extra, making Hvac Systems smaller. They also keep dust, allergens and other harmful stuff from circulating through the air, which helps avoid the potential circulation of stale air inside. Due to the fact people spend more than 90% of time indoors, and indoor pollution is often up to five times that of outdoor pollution,).An ERV system guarantees the most considerable volume of their life will take place in a balanced sustainable environment, creating a constant flow of external and fresh air into buildings to improve human health, performance and productivity.

How Does It Work?
Energy Recovery Ventilators (ERVs) are devices that transfer heat and moisture between the incoming fresh air and exhaust air stream to improve energy efficiency while maintaining thermal comfort. The basic concept behind ERVs is the exchange of heat and moisture between two air streams one of which is from inside the building and the other is from outdoors. For instance, in an application where two air streams are flowing at different temperatures, say 70 °F and 0 °F, ERVs transfer heat in such a way that the indoor air stream is cooled and outdoor air is heated, in turn maintaining comfortable conditions inside the building while decreasing the energy needed for heating or cooling.

The ERV core extracts heat and humidity from the incoming outdoor air before it's introduced into the building. Winter works the same way, as the system preheats the cold air drawn from outdoors with the warmer air leaving the dwelling, making it feel more comfortable and lowering the amount of energy needed to heat incoming air. While you can’t recover all energy with ERVs, they recover extremely well, and the performance is certified by AHRI (Air Conditioning, Heating and Refrigeration Institute) and will vary based on conditions in the environment.
ERVs are also an important factor for IAQ (Indicate Air Quality). They filtering pollutants such as VOCs, toxic gases, and allergens that off-gas from furniture, paints, carpets, and office aptitude. ERVs can be incorporated in homes, larger commercial buildings, or as independent components of an HVAC system. Balanced ventilation systems significantly improve IAQ over other ventilation types, such as exhaust or supply only, by offering balanced air exchange for active pollutant removal, irrespective of environment or climate.

Benefits of Using an ERV
In modern buildings, energy recovery ventilators (ERVs) play a critical role in enhancing indoor air quality (IAQ) and general comfort. Indoor air can often be many times more polluted than outdoor air — up to 100 times in some cases, according to the U.S. Environmental Protection Agency (EPA) — with serious health consequences. This problem is especially acute post-COVID-19, since inadequate ventilation can allow harmful virus aerosols to accumulate indoors. As buildings are designed to be more airtight in efforts to save energy, we need proper ventilation to keep us safe, but traditional measures like opening windows aren’t always possible, especially in severe heat or cold.

That's where energy recovery ventilators (ERVs) come to the rescue — capable of exchanging heat and moisture between incoming and outgoing air with high efficiency. In summer, they cool and dehumidify outdoor air; in winter, they warm it up and humidify it before bringing it inside. This decreases contaminants, including formaldehyde, allergens, and toxins, resulting in improved IAQ as well as energy savings. ERVs provide an effective way of balancing energy optimally while managing indoor moisture since they recover the humidity also on top of the heating and cooling. They can also help companies meet rigorous building codes and sustainability standards while optimizing operational costs by improving the efficiency of ventilation without compromising energy savings.

What’s The Difference Between An ERV And An HRV?
An ERV can reclaim both heat — sensible energy—and humidity — latent energy—from an exhaust airstream, thus, it uses up less energy in the alternate of conditioning outdoor air which gets into a building and developing indoor environment and manifested in fall within comfort levels. An HRV, on the other hand, just recovers heat — doesn’t managing moisture. That means ERVs in a relatively humid climate, whereas HRVs generally work better in cooler, drier conditions where moisture control isn’t as much of a concern.

Do I Need An ERV?
ERVs are important for achieving energy-efficient improvement in indoor air quality (IAQ) in the post-COVID-19 days. Airwoods enthalpy-core ERVs are characterized by high efficiency, flexibility, reliability, cleaner and more healthful air, and a stronger barrier against airborne pathogens. These systems also provide energy savings, which assist in cost reduction through the energy savings they provide. Discover Airwoods Energy Recovery Outdoor Air Solutions and DOAS roof top units that further maximise your ventilation load by decoupling the outdoor and indoor air loads. The systems introduce only dehumidified outdoor air that can be energy recovered to improve IAQ, comfort, and energy savings.