ASHRAE-90.1-2022- - Page 173
Extracted Content
Table 9.5.2.2 Additional Lighting Power
Section 9.4.1.1(j)
9.5.2.1-2 space types for required controls.
Notes:
| Description | Additional Lighting Power |
|---|---|
| Decorative | 0.70 W/ft2 |
| Retail sales | 750 W + (Retail Area 1 × 0.40 W/ft2) + (Retail Area 2 × 0.40 W/ft2) + (Retail Area 3 × 0.70 W/ft2) + (Retail Area 4 × 1.00 W/ft2) |
| Video conferencing | 0.50 W/ft2 |
Retail Area 1 = the floor area for all products not listed in Retail Areas 2, 3, or 4 Retail Area 2 = the floor area used for the sale of vehicles, sporting goods, and small electronics Retail Area 3 = the floor area used for the sale of furniture, clothing, cosmetics, and artwork Retail Area 4 = the floor area used for the sale of jewelry, crystal, and china
Table 9.5.2.3 Control Factors Used in Calculating Additional Interior Lighting Power Allowance
| Additional Control Method (in Addition to Mandatory Requirements) | Space Type | Col3 | Col4 | Col5 | Col6 |
|---|---|---|---|---|---|
| Additional Control Method (in Addition to Mandatory Requirements) | Open Office | Private Office | Conference Room, Meeting Room, Classroom (Lecture/ Training) | Retail Sales Area | Lobby, Atrium, Dining Area, Corridors/ Stairways, Gym/ Pool, Mall Concourse, Parking Garage |
| Programmable multilevel dimming control using programmable time scheduling | 0.05 | 0.05 | 0.10 | 0.10 | 0.10 |
| Occupancy sensors controlling the downlight component of workstation specific_luminaires_ with continuous dimming to off capabilities | 0.25a | 0 | 0 | 0 | 0 |
| Occupancy sensors controlling the downlight component of workstation specific_luminaires_ with continuous dimming to off operation, in combination with personal continuous dimming control of downlight illumination by workstation occupant | 0.30a,b | 0 | 0 | 0 | 0 |
a. Control factor is limited to workstation-specific luminaires in partitioned single occupant work spaces contained within an open office environment (i.e. direct-indirect luminaires
with separately controlled downlight and uplight components, with the downward component providing illumination to a single occupant in an open plan workstation). Within 30 minutes of the occupant leaving the space, the downward component shall continuously dim to off over a minimum of two minutes. Upon the occupant entering the space, the downward component shall turn on at the minimum level and continuously raise the illumination to a preset level over a minimum of 30 seconds. The uplight component of workstation specific luminaire shall comply with Section 9.4.1.1(h) ( automatic full OFF). b. In addition to the requirements described in footnote (a), the control shall allow the occupant to select their preferred light level via a personal computer, handheld device, or simi larly accessible device located within the workstation.
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 171