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Description of Prescriptive Measures <br />a. Install fenestration with a solar heat gain coefficient either i) <br />"Fenestration" is another word for glass. High efficiency glass saves HVAC <br />no less than 0.45 in hotels/motels/high-rise multifamily, or ii) <br />no greater than 0.22 in all other space types. <br />HVAC <br />energy. <br />b. Design Variable Air Volume (VAV) box minimum airflows to <br />VAV boxes are located above ceilings in some commercial buildings. This <br />be equal to the zone ventilation minimums. <br />HVAC <br />measure saves fan energy. <br />"Economizer" describes a setting on an air handler which cools by bringing in <br />c. Include economizers and staged fan control in air handlers <br />100% outside air, without using the air conditioning unit, when the air outside <br />with a mechanical cooling capacity >_ 33,000 Btu/h <br />HVAC <br />is the right temperature (55-70F) <br />d. Reduce the lighting power density (Watts/ft2) by ten percent <br />"Lighting power density" is used to define how much lighting energy is in a <br />(10%) from that required from Table 140.6-C. <br />Lighting <br />space. Lower lighting power density means less lighting energy use. <br />Common Areas Lighting Improvement: Control to daylight <br />Daylight dimming saves energy by turning down lights when daylight is <br />dimming plus off per Section 140.6 (a) 2H <br />available. <br />Lighting <br />2) Install Occupant Sensing Controls in Large Open Common <br />Lighting controls save energy by turning lights off when the space is not <br />Areas Lighting Improvement: Install Occupant Sensing Controls <br />occupied <br />in Large Open Plan Offices per Section 140.6(a)2 <br />Lighting <br />Common Areas Lighting Improvement: Perform Institutional <br />Tuning lighting through institutional dimming practices reducing annual <br />Tuning per Section 140.6(a)2J <br />Lighting <br />lighting energy usage <br />f. Install one drain water heat recovery device per every three <br />Drain water heater recovery devices in hotels save energy by pre -heating <br />guest rooms that is field verified as specified in the Reference <br />incoming water with hot water which is going down the shower drain <br />Appendix RA3.6.9. <br />Hot Water <br />b. Limit the fenestration area on east -facing and west -facing <br />"Fenestration" is another word for "glass." Reducing glass on the East and West <br />walls to one-half of the average amount of north -facing and <br />sides of a building saves air conditioning energy. <br />south -facing fenestration. <br />HVAC <br />