Indoor Air Quality

Each year, Indoor Air Quality (IAQ) becomes more of a concern as buildings become "tighter" in an effort to improve the energy efficiency of buildings. Without proper ventilation, air contaminants concentrate within the living area or workspace. The presence of these contaminants, combined with the fact that most people spend about 90 percent of their time indoors, can cause substantial exposure to harmful pollutants. These pollutants include airborne molds and fungus produced by overly damp conditions, high carbon dioxide concentrations, residual solvent concentrations (out-gassing from carpet, particle board and composite materials) and low levels of carbon monoxide from combustion sources.

When poor IAQ is suspected, a large effort is usually made to measure and possibly locate the source of contamination. An additional effort may also be made to ventilate for these pollutants. Ironically, excess air is usually brought into the space which then needs to be re-conditioned - heated or cooled, thereby reducing potential energy savings.

In many cases, IAQ need not be sacrificed for energy savings or visa-versa. The challenge is to ventilate when required and if possible to provide verification of good indoor air quality.

Demand Controlled Ventilation (DCV) is a proven strategy which basically allows only the amount of outside air into a space which is required for comfort and ventilation. The most common method of DCV is to monitor Carbon Dioxide (Co2) and use it as a "tracer" gas. A control system then sequences the amount of outside air based on the amount of Co2 in the space. In other words, the more Co2 sensed- more outside air is brought in...less Co2 -less outside air. Energy savings are realized by allowing only the required amount of air based on people occupancy. Savings in the 15% to 30% are typical. It is a proven strategy used in both Industrial and Commercial applications and eligible for utility rebates.

Visit our website, www.ambientmechanical.com, to contact a representative who can provide additional IAQ information, including DCV energy saving software.

ADDITIONAL SOURCE: www.yorkland.net

Featured Products

PureChoice Indoor Air Quality Sensors

PureChoice IAQ sensors can continuously monitor and verify IAQ in a space. They can be added to part of an existing automation, stand alone or via a web based system, to continuously measure, track, record, and report in real-time, indoor air quality conditions - alerting you to environmental changes before they become problems. Please visit their website for more information. www.purechoice.com

PureChoice Sensors

Johnson Controls Variable Speed Drives

Variable Speed Drives have reduced in cost and increased in reliability. There application in HVAC systems is more than a passing fad. We created an application guide to assist you in applying drives in new or retrofit situations. You can download the guide at www.johnsoncontrols.com Johnson Controls has also expanded their drive offering by including an integrated controller and drive.

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If you'd like to learn more about these products, please contact us. We’re experts in the field.

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