Airxchange Technology : Indoor Environment

Provide a better Indoor Environment with Energy Efficient Ventilation.

The HVAC community plays a vital role in providing healthful indoor environments in which to live, learn, work, and play. With half of all illnesses attributable to indoor airborne contaminants, the EPA has declared indoor air quality a public health priority. Ventilation with outdoor air is the only strategy that can simultaneously reduce the levels of all indoor pollutants. This strategy, in general accordance with the Dilution Principle, is shown in the illustration below.




Each doubling of the ventilation rate results in a 50% reduction in the concentration of all constant source air pollutants evenly mixed within the space. At 1.0 ACH, pollutant concentrations are reduced by a factor of 5. National, state and local codes mandate minimum outdoor air ventilation rates based on ASHRAE Standard 62, Ventilation for Acceptable Indoor Air Quality. The challenge is to introduce the outdoor air at the levels required by the codes while maintaining indoor comfort and conserving energy.

Why Energy Recovery Ventilation:

Building Code requirements for increased outdoor air ventilation rates have placed new demands on HVAC equipment and on building operating budgets. Energy recovery ventilation reduces the load on the system due to outdoor air by taking advantage of the work that has already been done to heat, cool, humidify or dehumidify the space. Instead of exhausting building energy to the outside, it is temporarily captured on the surfaces of the enthalpy wheel heat exchanger and then released to pre-heat, pre-cool, humidify or dehumidify the incoming air. Enthalpy wheels do this with exceptional efficiency and are the leading technology for achieving energy conservation while ventilating for health and comfort.


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