cool roof requirements for steep-sloped applications, which consist
of high reflectance and high emmitance for the roofing products.
The alteration requirements for roofing products have
been changed to clarify that all replacements, recovering or
recoating of the exterior surface of existing roofsshall meet the
requirements of 118(i).
The prescriptive overall building envelope method has
been revised to combine heating and cooling and to provide
simplified trade-offs for roofing alterations.
Site-built fenetration now include a new NFRC
Component Modeling Approach (CMA) certification, new fenestration
acceptance requirements and changes to CEC default values.
Revised presciptive requirements for roof, wall and
floor insulation levels in certain climate zones.
The lighting power limits for some indoor lighting
in the Area Category and Complete Building type of units are reduced
in response to advances in lighing technology. New function
areas and type of uses have been created. There are updates
for for indoor lighting requirements for Tailored Method, including
wall and floor display lighting.
Added new requiremnets for occupant sensors in indoor
areas, including offices less than 250 square feet, multipurpose
rooms of less than 1000 square feet, and classrooms and and
conference rooms of any size.
New demand response controls for to reduce indoor
lighting when signaled including load shedding ballasts.
For prescriptive skylight compliance in low-rise
conditioned or unconditioned enclosed spaces that are greater than
8,000 square feet directly under a roof with ceiling heights greater
than 15 feet and have a lighting power density equal to or greater
than 0.5 W/sq ft shall meet 143(c)1-4
Updates to require automatic daylighting controls
within daylit areas near windows for some types of buildings.
The definition of daylit area has been updated.
For outdoor lighting, LPDs have been revised to
reflect new twechnologies and IESNA recommendations. Outdoor
lighting compliance has been revised to introduce the "layered
approach" to simplify compliance. Sign lighting power
limits (or alternative equipment efficiency requirements) apply to
externally and internally illuminated signs used either indoors or
outdoors. The list of alternative light sources has been
expanded and reorganized to better reflect the state of technology.
Basic "building commissioning", at least on a
component basis, is required for mechanical equipment that is prone
to improper installation.
Controls that measure CO2 concentrations and vary
outside ventilation rates are required for spaces such as
conference rooms, dining rooms, lounges and gyms. The 2008
Standards expand the DCV requirements to multizone systems but
exempt high occupant density spaces from this requirement, and add
new requirements to ensure that adequate ventilation is provided to
New requirements for refrigerated warehouses.
New mandatory and prescriptive requirement for
Hotel/Motel occupancies to use residential water heating models, and
new prescriptive requirements for gas water heating in
New control requirements for for single-zone variable
(adjustable) air volume eqipment.
Expand direct digital control systems to zone level
for HVAC , including demand shedding controls, hydronic pressure
reset, VAV zone minimums, and supply air temperature reset.