ER – Energy Recovery

Energy recovery ventilation is the energy recovery process of exchanging the energy contained in normally exhausted building or space air and using it to treat (precondition) the incoming outdoor ventilation air in Industrial HVAC systems.

Bessamaire offers 3 types of Energy Recovery Modules.

  • Energy Wheel (Sensible & Total Enthalpy)
  • Plate to Plate Heat Exchanger (Sensible)
  • Heat Pipe Coil – Severe Duty (Sensible)

There are applications where an ERV makes more sense, such as a locker/shower room. In this case, the indoor humidity always is much higher than the outdoor humidity and it is desirable to remove that moisture from the space at all times of the year.

During the warmer seasons, the system pre-cools and dehumidifies while humidifying and pre-heating in the cooler seasons. The benefit of using energy recovery is the ability to meet the ASHRAE ventilation & energy standards, while improving indoor air quality and reducing total HVAC equipment capacity.

Why Now?

Other than energy savings, the main market driver behind increased use of ERV technology is the impact of codes and standards. ASHRAE Standard 62.1, “Ventilation for Acceptable Indoor Air Quality,” from the Atlanta-based American Society of Heating, Refrigerating and Air-Conditioning Engineers, is a major pillar of the International Mechanical Code from the Washington, D.C.–based International Code Council and the U.S. Green Building Council’s LEED rating system, as well as many local ventilation codes. This standard dictates how much ventilation air must be brought into a building. For most buildings constructed since 1989, this equates to 15 to 20 CFM per person. Prior to 1989, it typically was 5 to 10 CFM per person. As older buildings are being rehabbed and brought up to code, more outside air needs to be brought into these buildings and conditioned.

ASHRAE Standard 90.1, “Energy Standard for Buildings (Except Low-Rise Residential),” is an important component of ICC’s International Energy Conservation Code, LEED, and state energy codes. This standard dictates how much energy a building is allowed to consume. The difficulty is that one standard/code (ASHRAE 62.1) tells us to bring in outside air, which is costly to heat, cool, and dehumidify, while another standard/code (ASHRAE 90.1) tells us to not use any energy to do so.

  • Bessamaire Energy Recovery Modules have not only demonstrated an effective means of reducing energy cost and heating and cooling loads, but have allowed for the scaling down of equipment. Additionally, this system will allow for the indoor environment to maintain a relative humidity of 40% to 50%. This range can be maintained under essentially all conditions. The only energy penalty is the power needed for the blower to overcome the pressure drop in the system.

The return on investment (ROI) for project cost in a typical commercial industrial setting ranges from 24-36 months.

Bessamaire would be happy to consult and evaluate through a detailed needs analysis, the savings related to an energy recovery application.

Available from 2000 CFM to 30,000 CFM.

Available in vertical and horizontal configurations: