ASHRAE-90.1-2022- - Page 156
Extracted Content
Table 9.3.1-3 Simplified Building Method for School Buildings
| Interior Space Type | Controls |
|---|---|
| All_spaces_ in school_buildings_ other than parking garages The total_LPA_for the_building_other than parking garages shall not exceed 0.63 W/ft2 | All lighting shall be_automatically_controlled to turn off when individual_spaces_are either unoccupied or scheduled to be unoccupied. (Exception: Lighting load not exceeding 0.02 W/ft2 multiplied by the gross lighted area of the_space_ shall be permitted to operate at all times.) Each_space_ shall have a_manual_ control device that allows the occupant to reduce lighting power by a minimum of 50% and to turn the lighting off. |
| Classrooms, offices_spaces_, conference rooms, meeting rooms, library, storage rooms, and break rooms | These_spaces_ shall also be controlled by_manual_-ON occupant sensors. |
| Gymnasiums and cafeterias | These_spaces_ shall also be controlled by_occupant sensors_. |
| Restrooms | These_spaces_ shall also be controlled by_occupant sensors_. |
| Stairwells and corridors in school_buildings_ and parking garages | These_spaces_ shall also be controlled by_occupant sensors_ that reduce the lighting power by a minimum of 50% when no activity is detected for not longer than 15 minutes and be controlled to turn off when the _building_is either unoccupied or scheduled to be unoccupied. |
| Parking Garages: The_LPA_shall not exceed 0.14 W/ft2 for the interior parking floors. Uncovered floors of a garage shall use_LPA_and control requirements in Table 9.3.2 for parking lots. | All lighting shall be controlled by_occupant sensors_. Controls shall reduce the power by a minimum of 50% when no activity is detected for not longer than 15 minutes. No device shall_control_ a more than 3600 ft2. |
Table 9.3.2 Simplified Building Method for Building Exteriors
| Exterior Area Type | Exterior Lighting Power Allowance a,b | Controls |
|---|---|---|
| All exterior areas | All lighting shall be_automatically_controlled to shut off the lighting when daylight is available. | |
| Base allowance | 200 W | Luminaires shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
| Façade lighting | 0.10 W/ft2 | Luminaires shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
| Roof terraces, special feature areas, walkways, plazas and ramps | 0.07 W/ft2 | _Luminaires_shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
| Landscape | 0.036 W/ft2 | Luminaires shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
| Entry doors | 14 W/linear ft | Luminaires shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
| Stairs | Exempt | No additional controls required. |
| Parking lots and drives | 0.037 W/ft2 | Luminaires mounted 25 ft or less above_grade_ shall be controlled to reduce the power by at least 50% when no activity is detected for not longer than 15 minutes. |
| All other areas not listed | 0.20 W/ft2 | Luminaires shall be turned off or the power reduced by a minimum of 75% during nonoperating hours. |
a. To calculate the exterior allowance, multiply the space or area square footage by the allowed W/ft [2] and sum the exterior allowances and the base allowance. Façade lighting shall
be calculated separately by multiplying the facade area by the allowed W/ft [2] . Façade allowance shall not be traded with other exterior areas or between separate facade areas . b. For buildings in Lighting Zone 2, as defined in Table 9.4.2-1, multiply exterior allowances by 0.7. For buildings in Lighting Zone 4, as defined in Table 9.4.2-1, multiply exterior
allowances by 1.4.
154 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)