Energy RecoveryWith almost 40% of the world’s energy being consumed by buildings, it is vital that both the builders and the building’s residents implement a system that could reduce the energy cost, such as an ERV. Unfortunately, instead of using something like an energy recovery ventilator or ERV, people use the “open window” method. This method, unlike an ERV, destabilizes the temperature inside the building, which makes the building’s heating, ventilation, and air-conditioning (HVAC) system work overtime.

Exhaust ventilation is also less efficient than an ERV. Unlike an ERV, an exhaust simply takes the air inside the building and pushes it out; it doesn’t introduce fresh air, nor does it do anything to maintain the climate of the room.

What is an ERV?

An ERV is a balanced ventilation system that transfers heat and moisture between two airstreams: the one leaving the building and the one entering it. This process means that less energy is used to either cool or heat the air that is coming into the building. With less energy being used, the ERV helps you save money on heating and cooling costs.

The ERV is useful and efficient in both the summer and winter months. During winter, the ERV expels the hot, indoor air of the building and preheats the cool, fresh air that is coming inside. Meanwhile, during summer, the ERV gets rid of the building’s stale air and removes the heat from the fresh summer breeze that’s blowing in from the outside.

In addition, the ERV limits the moisture coming into air-conditioned buildings and restricts the moisture expelled from a humidified building. Both the temperature and humidity levels of the building will be kept at a constant with the ERV.

Types of ERV

There are four types of ERV. Each of these has been around for more than 20 years and has been proven to be effective:

  1. Rotary Heat Exchanger (Wheel)

The rotary heat exchanger, or wheel, is the most popular ERV. Made of plastic or metal, it rotates between the exhaust and outdoor airstreams and picks up air from one to transfer it to another.

It is less costly than the other types of ERV and has a reasonable pressure drop, ease of maintenance, and smaller physical footprint.

  1. Plate Heat Exchanger (Fixed Core)

The fixed-core plates type of ERV are larger and cost more than the wheel. It has no moving parts and can be made of metal, plastic, and even paper. In this ERV, the airstreams pass each other through a series of channels where they either heat up or cool down and transfer energy.

  1. Heat-Pipe Exchanger (Refrigerant)

Made from copper tubes, the heat-pipe exchanger is a kind of ERV that has refrigerants inside them. The copper tubes run between two airstreams: the exhaust and the outside air. In this ERV, the airstreams undergo a process of evaporation and condensation to change temperatures.

  1. Runaround Coils (Water)

The runaround coil is an ERV that is used more often when the exhaust and outdoor airflows are separated by a large distance. It requires the installation of two water coils: one in the exhaust airstream and the other in the ventilation air stream. Although having similarities with the heat-pipe exchanger, this kind of ERV uses a water/glycol mixture instead of a refrigerant. The mixture is then pumped between the two coils.

Why Ventilate With an ERV?

The ERV is a cost-effective way to ventilate your building. By using an ERV, you’ll be able to reduce the energy consumption of your HVAC system and improve the air quality inside your building.

There should be an ERV in every building, especially those that have a lot of occupants. If you’re in the market for an energy recovery ventilator, don’t hesitate to turn to Zehnder America. We are dedicated to bringing you heat and energy recovery ventilators that will bring you fresh air every day. With us, you’re sure to get healthier indoor air quality.

Zehnder America: Bringing High-Efficiency Heat Recovery to the US

Zehnder America is a provider of ventilation solutions. It is a division of the Zehnder Group, a global company in Switzerland that specializes in heating, cooling, and ventilation technology. Zehnder America aims to continually fulfill its promise of helping you improve the quality of indoor air through innovative products.

Are You Aware of Indoor Air Health Hazards?

Today, some buildings are purposely designed to tower over the rest and to be compressed to save space. It addresses some problems caused by population density, but unfortunately, it also leads to reduced indoor air circulation. Studies have shown that poorly ventilated buildings can have up to five times more air pollutants than the outdoors.

Insufficient air ventilation results in more than just stuffy air and discomfort. Poor quality indoor air is the perfect breeding ground for harmful microorganisms, such as dust mites. Constant exposure to these air contaminants may lead to health conditions, such as allergies and skin rashes, and even to more serious illnesses like chronic respiratory complications.

Research has also shown a link between exposure to unhealthy air and emotional and cognitive issues, such as:

  • Lethargy
  • Drowsiness
  • Fatigue
  • Mental Fogginess
  • Mood Changes
  • Depression

Fortunately, you can avoid the risk of suffering from all these illnesses. Through consistent effort to improve the quality of life, air ventilation and temperature management systems are now available. Also, check out WebMD’s 12 ways to improve indoor air quality (

Zehnder America: Helping You Combat Airborne Threats

Zehnder America offers heat and recovery ventilators, air distribution systems, and geothermal heat exchangers. It acknowledges that the state of indoor air is a silent yet serious factor in your overall health and well-being. In fact, the United States Environmental Protection Agency (EPA) has cited poor-quality indoor air as among the top health risks. Fortunately, the advancements in technology have paved the way for innovations that help mitigate these perils. Zehnder America’s products allow you to enjoy a comfortable indoor environment and avoid health threats caused by airborne particles.

Through products like Heat Recovery Ventilation (HRV) and Energy Recovery Ventilation (ERV) systems, Zehnder America aims to help you get rid of air pollutants. These technologies foster consistent circulation of fresh air. They feature an efficient mechanism for ensuring that you have optimal indoor air.

Systems With Heat Recovery for Comfortable Indoors

Zehnder America’s Comfosystems features geothermal heat exchange, HRV, ERV, and air distribution units. It is the result of a continuous pursuit to keep fresh air in houses and establishments with windows that often have to remain closed for a variety of reasons, such as to keep noise and dust particles out.

Comfosystems is carefully engineered to ensure that you always have enough fresh, clean air indoors in the microclimate that you prefer, all year round. HRV and ERV expel existing indoor air and draw fresh air into your indoor space. It acts as a spinning wheel to facilitate indoor–outdoor air exchange.

You can choose to have a geothermal heat exchanger that warms up the fresh air using 90% of the energy extracted from the stale air that’s about to go out of the vent. This paves the way for an unceasing stream of fresh air while maintaining energy efficiency.

The air distribution unit ensures that every rooms gets fresh air. Users have the option to adjust the air volume delivered to each room.

For homeowners, Zehnder America’s Comfosystems is an investment that pays off. It helps maintain or even boost the value of your home because it protects the interiors of your house from mildew formation caused by lack of ventilation. It also prevents moisture damage, which could lead to costly repairs.

But, Comfosystems is not just for residential use. It is also great for hospitals, schools, and offices, as it maintains quality indoor air that’s vital for overall health, cognitive function, and productivity.

Contact Zehnder America Today

Contact our team. Invest in an efficient air heating, cooling, and distribution system, and relish in healthier and happier living. For inquiries about Zehnder America’s Comfosystems, call 877-959-4005 or visit 6 Merrill Industrial Drive, Suite 7, Hampton, NH 03842.