ASHRAE 90.1 2010

October 18, 2013

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Energy Consumption

Buildings consume 40% of the primary energy and 71% of the electrical

energy in the US. Driven by economic expansion and population growth

that require more and more facility space each year, energy use in the US

commercial sector is expected to grow by 1.6% per year.

HVAC

Office

Equipme

nt All Other

Lighting

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ASRHAE 90.1-2010 Standard

In the ASRHAE 90.1-2010 Standard, there are mandatory requirements:

- area controls

- automatic lighting shutoff

- bi-level lighting

- daylight harvesting

- exterior lighting control

- parking garage lighting control

- stairwell lighting control

- Designer must ensure that all lighting controls are functionally tested.

Lighting controls are a critical component for saving energy in buildings; they are

now a ‘must have’ in buildings instead of a ‘nice to have.’ These controls can

eliminate 60% or more of the wasted lighting energy in buildings while enhancing

occupant comfort and productivity.

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ASHRAE/IES 90.1-2010 DOE Ruling

The U.S. Department of Energy (DOE) issued a ruling that requires all states to certify that they have updated these provisions. All of their commercial building codes regarding energy efficiency needs to meet or exceed ASHRAE 90.1-2010 by Oct. 18, 2013. It can be expected that these lighting control requirements will be in place for most states for all new construction and major renovations of commercial buildings.

• Commercial buildings designed to ASHRAE/IES

90.1-2010 are expected to achieve, compared to

buildings compliant with ASHRAE/IES 90.1-2004,

excluding plug loads

– 32.6% site energy savings and 30.1% energy

cost savings

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Triggering code compliance

New Construction X X X X

X connected lighting load

Alterations > 50% of

connected lighting load X X X (2009)

Alterations > 10% of

ASHRAE 90.1 IECC

2010 2004/2007 2012 2006/2009

Section Section 9.1.2 Section Section

9.1.2 C101.4.3 505.1

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Important ASHRAE 90.1 2010 prescriptive controls for general

lighting in Office spaces.

• All spaces must have a device to control the lighting in the space

– Manual –on switch

– Automatic switch –on to 50% or less of the maximum power

• All spaces must have controls to reduce the light level.

– Controls should allow a reduction in power of 30-70% with respect to

the maximum load.

– Exception for spaces that are temporarily used (classroom,

conference, restrooms) and Office spaces up to 250 sq ft. These must

have an occupancy sensor (max 30 min. time delay)

• Daylit zones must have Automatic multi-level daylighting controls

– Required for all sidelit areas >250sq ft and toplit areas >900 sq ft

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ASHRAE/IES 90.1-2010 requirements:

Occupancy sensors(or timer switches, per approval by the authority having

jurisdiction) that turn the lights OFF within 30 minutes of the space becoming

unoccupied are required in:

• classrooms and lecture halls.

• conference, meeting and training rooms;

• employee lunch and break rooms;

• storage and supply rooms between 50 and 1,000 sq.ft. in size;

• rooms used for document copying and printing;

• office spaces up to 250 sq.ft.

• restrooms, dressing, locker and fitting rooms.

• guestroom bathrooms in hotels, motels, boarding houses and similar buildings

must turn OFF the lighting (with the exception of night lighting not exceeding 5W)

within 60 minutes of the occupant leaving the space

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ASHRAE 2010 vs Previous Requirements

Outdoor

2010

1st - ALL outdoor lighting must be

controlled by a photosensor.

2nd - building façade or landscape

lighting must also be controlled by

an astronomical time switch that

turns the lights OFF between

midnight or business closing

(whichever comes first) and 6AM

or business opening (whichever

comes first) (or at times

designated by the authority having

jurisdiction).

Previous

Outdoor lighting to be controlled

by a photosensor (daylight) or

astronomical time switch

(scheduling) for dusk-to-dawn

lighting and either a time switch or

combination photosensor/time

switch. It also required that

building grounds lighting fixtures

>100W either use lamps with an

efficacy of 60+ lumens/W or be

controlled by a motion sensor, with

a long list of exceptions

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ASHRAE 2010 vs Previous Requirements

Retrofit

2010

If a lamp/ballast replacement

represents 10% or more of the

connected lighting load in an

indoor space or outdoor area, the

owner must comply with the

standard’s lighting power density

limits expressed in watts per

square foot and also its automatic

shutoff requirements

Previous

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ASHRAE 2010 vs Previous Requirements

Multilevel Lighting

2010

ASHRAE 2010 embraces it

broadly for indoor and outdoor

automatic shutoff and space

controls, with special requirements

for specific applications.

(Reduce lighting power by either

continuous dimming, stepped

dimming, or stepped switching

while maintaining a reasonably

uniform level of illuminance

throughout the controlled space.)

Previous

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ASHRAE 2010 vs Previous Requirements

Manual On or Auto-On 50%

2010

Automatic shutoff controls must be

manual-ON or automatically turn

the lighting ON to not more than

50% power.

Exceptions:

• public corridors and stairwells

• Restrooms

• primary building entrance areas

and lobbies

• areas where manual-ON would

endanger safety or security.

Previous

Previous versions of the standard

allowed automatic control devices

to activate the lighting system as

well as turn it OFF.

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Stairwell Lighting

CLTC Research Demonstration Results

Occupancy Rates:

Energy Savings:

http://cltc.ucdavis.edu/

1% - 29%

20% - 60%

9.4.1.4 9.4.1.6

50% lighting power reduction within 30

minutes of vacancy X

ASHRAE 90.1 IECC

2010 2004/2007 2012 2006/2009

Section Section

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System Commissioning

Perform functional testing X X

X X placement for occupancy sensors

Confirm programmable devices are

programmed to turn the lights off X X

X X placement for photosensors

Submit documentation certifying

performance X X

Confirm acceptable performance and

Confirm acceptable performance and

ASHRAE 90.1 IECC

2010 2004/ 2012 2006/

Section 2007 Section 2009

9.4.4 C408.3

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ASHRAE/IES 90.1-2010 requirements:

Power Adjustment Credits.

• When a lighting control system is installed that is more advanced than the

controls required in the standard, an incentive in the form of additional lighting

power is allowed creating additional energy savings.

• Qualifying technologies range from manual dimming control to automatic

continuous daylight harvesting dimming, with power adjustment factors, which

are applied to the controlled lighting load, of 5-30%.

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ASHRAE 90.1-2010 Lighting Power Allowances

CONTROL SPACE FACTOR

Multi-Level Occ. Sensor Open and private office, classroom,

conference room, or retail sales area

0.05

Manual, continuous dimming control or

programmable multi-level dimming control

Open and private office, classroom,

conference room, or retail sales area

0.05 to 0.10 depending on space type

Programmable multilevel dimming control

using programmable time scheduling

Open and private office, classroom,

conference room, retail sales area, lobby,

atrium, dining area, corridors/stairways,

gym/pool, mall concourse, or parking garage

0.05 to 0.10 depending on space type

Automatic continuous daylight dimming or

multilevel daylight switching

Open and private office, classroom,

conference room, retail sales area,

lobby, atrium, dining area,

corridors/stairways, gym/

pool, mall concourse, or parking garage

0.10 to 0.20 depending on dimming or

switching, effective aperture, and

space type

Workstation luminaire with occupancy

sensors controlling dimmable downlight2

Open office 0.25

Workstation luminaire with occupancy

sensors controlling dimmable downlight and

personal dimming control3

Open office 0.30

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Controls required per code/standard

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Features HPB

Net Zero

Std.

189

NYC Green

Code

Title

24

90.1-

2010

90.1-

2007

90.1-

2004

2001-

1999

Auto-shutoff

Occupancy

Vacancy

Bi-Level & Bi-Level Vacancy

Individual Space Control

Daylight Dim

Demand Response

Energy Metering

3rd party functional testing

Energy Monitoring

Receptacle 50% auto off

Alternative Energy Management

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Controls required per code/standard

27

Features HPB

Net Zero

Std.

189

NYC Green

Code

Title

24

90.1-

2010

90.1-

2007

90.1-

2004

2001-

1999

Prescribed auto-off

compliance routes:

Holiday feature for auto-off

Manual override >/=2 hrs

Functional override, e.g., A/V

Compliance triggered by:

Change 50% of fixtures

Change 10% of connected

load

LEED v3 requires 90.1-2010

Std. 189 requires 2007

EPAct requires 2004

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Resources

• ASHRAE

– www.ashrae.org

• NEMA

– www.nema.org

• EPA Energy Star Program

– www.energycodes.gov

• Department of Energy Building Codes

– www.energycodes.gov

• IESNA

– www.iesna.org

• DSIRE – Database of State Incentives

– www.dsireusa.org

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