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February 2006

A Round on Energy Recovery Wheels

As energy costs continue their upward spiral, Owners and Engineers are renewing their efforts to find ways to reduce building energy consumption. Consequently, the Energy Recovery Ventilator (ERV) is increasingly becoming a standard feature in heating, ventilating, and air conditioning (HVAC) design. Energy recovery ventilators are used to precondition outside air, using recovered building energy to do so. While useful on any building type, an ERV is most effective on those buildings with very high outside air requirements, such as schools, nursing facilities, hospitals, and laboratories. “Energy recovery ventilators are used to precondition outside air, using recovered building energy to... Read More

Highlights of High-Bay Lighting

In recent years, architectural design has accentuated and made popular the idea of the ‘high-bay’ space. Areas such as gymnasiums, indoor pool facilities, libraries, and cafeterias have all seen their interior ceiling heights pushed higher and higher. As ceiling heights have increased, so has the need for higher output lamps to light them. Until recently, designers utilized metal halide (MH) lamps for these high-bay applications because they provide a high output source, with good optical control, from a very small size lamp. Despite these photometric advantages, MH lamps come with significant operational constraints. MH lamps, for example, do not reach... Read More