The SEMCO FV system is a packaged system which includes supply and exhaust air fans, outdoor and return air filters and SEMCO’s EXCLU-SIEVE® total energy recovery wheel. The EXCLU-SIEVE wheel recovers both sensible (temperature) and latent (moisture) energy; it cools and dehumidifies the outdoor air during the cooling season, while heating and humidifying the outdoor air in the heating season.

The EXCLU-SIEVE wheel utilizes a honeycomb-like media having an aluminum substrate, which is carefully coated with a fast-acting, adsorbent desiccant surface. As the transfer media slowly rotates between the outdoor and exhaust air streams, the higher temperature air gives up its sensible energy to the aluminum. This energy is then given up to the cooler air stream during the second half of the revolution.

Just as the temperature is captured and released, so is the moisture. EXCLU-SIEVE’s molecular sieve desiccant coating has an enormous internal surface area and a strong attraction to water vapor. Since the opposing air streams have different temperature and moisture contents, their vapor pressures differ. This difference causes the transfer of latent energy.

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The desiccant used in the EXCLU-SIEVE wheel is a highly selective adsorbent, 3Å molecular sieve. It recovers the moisture from an exhaust air stream without adsorbing the airborne pollutants contained within the air stream. This important and unique feature has been well documented through independent laboratory and field-testing.