|
Infiltration and Testing |
Proposes a Base Code prescriptive standard for
whole-house infiltration at 2012 IECC levels. (3 ACH
50). This will be a test standard like the current duct
leakage standard.
|
Residential
Topics |
Zoned Air Conditioning
|
Proposes improved Base Code requirements for zoned HVAC
systems to meet current fan airflow and watt draw; also
proposes to prohibit by-pass ducts in zoned HVAC
systems.
|
Residential
Topics |
|
Residential Roof Envelope Measures |
Proposes
Base Code prescriptive requirements for: roof
reflectance of 0.24, R13 under-deck insulation, R30 or
R38 attic insulation, and duct insulation in attic. Also
proposes a Base Code Compliance Option of a
high-reflectance cool roof.
Proposes a Reach Code compliance option for unvented
attics.
|
Residential
Topics |
|
Residential Window Efficiency |
Proposes Base Code revised prescriptive requirements for
window SHGC and U-factor based on cost-effective levels
and market availability: 0.32 U-factor, 0.25 SHGC.
|
Residential
Topics |
|
Solar Ready Homes |
Proposes to make new construction homes solar ready with
Base Code prescriptive requirements of : Adequate roof
space allocated for solar installations in future,
ensuring dedicated solar space is free of vents or other
roof protrusions, documentation of roof structural
capacity on drawings, documentation of paths for
installing electrical conduits and plumbing for future
solar systems on drawings, requiring electrical panel to
have a minimum bus-bar capacity of 200 amps and two
additional breakers on panel for future PV
installations.
|
Solar Topics |
|
Solar-Oriented Developments |
Proposes Reach Code requirements for new sub-divisions
to have optimal street and lot orientation for building
energy efficiency and solar access.
|
Solar Topics |
|
Compressorless Comfort Homes |
Proposes Reach Code requirements to establish
prescriptive criteria for homes in coastal areas based
on a high-efficiency envelope design, by modifying
package D. Potential measures include: lower envelope
U-factors, night-ventilation, ceiling fans, and passive
solar designs.
|
Residential
Topics
|
|
HVAC Baseline |
Proposes a Base Code alternate prescriptive path for
high-efficiency air conditioning.
|
Residential
Topics |
|
Residential Ducts |
Proposes Base Code
mandatory requirements for: duct testing for all new
construction and retrofit applications, improved fan
watt draw requirements based on current motor
efficiencies, set CFM/ton values for cooling coil
airflow, set standard for duct pressure drop: Develop
simplified duct-sizing guidelines for return grills.
|
Residential
Topics |
|
Residential Lighting |
This measure proposes a compliance credit for
higher-efficacy lighting for Residential Buildings in the
base code as well as requirements for higher-efficacy
lighting in the reach code.
|
Lighting
topics |
|
Multi-family DHW and Solar Water Heating |
Proposes Base Code requirements for multifamily
buildings with central water heating. Mandatory
requirements include: require MF buildings be SWH-ready
with adequate roof area for future installation of solar
collectors, documentation of roof structural capacity on
drawings, documentation of paths for installing
electrical conduits and plumbing for future solar
systems on drawings, and adequate space in boiler room
for solar storage tanks. Prescriptive requirements
include requiring SWH installation with a minimum solar
fraction for multifamily buildings with central water
heating.
For existing MF buildings, require SWH systems when
triggered by events such as water heating equipment
replacement or major roof repairs.
|
Solar Topics
Residential
Topics |
|
Advanced Envelope Assemblies |
Proposes Base Code compliance options and updated Joint
Appendix tables to include advanced framing for exterior
walls with high-R values, with specifications for
insulation based on 6” instead of 4” studs.
|
Residential
Topics |
|
Refrigerant Charge Testing |
Proposes Base Code new testing protocol for winter
charge, alternate test protocol for micro-channel
systems, and refinements to standard refrigerant charge
testing protocols.
|
Residential
Topics |
|
Residential DHW Distribution Systems and Showerheads |
Proposes Base Code ACM changes to the single family
distribution system multipliers for DHW systems and
revised prescriptive requirements for low-flow
showerheads: lower to 2.0 gpm from 2.5 gpm.
|
Residential
Topics |
|
Night-Ventilation Systems |
Proposes a Base Code compliance option for
night-ventilation systems, such as the night-breeze
system.
|
Residential
Topics |
|
Ventilation and Economizing |
This measure proposes to reduce ventilation W/CFM allowances
to minimize fan energy use; will encourage residential
economizer use to offset load and reduce stand-alone
ventilation and will address minimum outside air
requirements for the HVAC system to reduce fan energy use.
|
This CASE is on hold for a
future code cycle. |
|
Ducts in Unconditioned Spaces |
This measure will propose requiring metal ducts for long
term integrity against rodents and other factors leading to
deterioration of flex ducts over time.
|
This CASE is on hold for a
future code cycle.
|
|
Maximum ACM Budget |
This measure proposes that large houses must meet energy
budget based on a reference home with a maximum floor area
or some curve to represent large homes.
|
This CASE is on hold for a
future code cycle.
|
|
Laundry |
This measure proposes laundry rooms pre-piped with gas line
stub into room and hard piped duct for laundry exhaust.
|
This CASE is on hold for a
future code cycle.
|
|
California New Homes Survey Phase II and III |
The Phase II surveys collect additional summer-time
performance data on HVAC systems and infiltration in new
construction homes. The Phase III surveys conduct
interventions to improve performance of duct systems through
proper duct sizing.
|
This CASE is on hold for a
future code cycle.
|
|
CALRES Phase II Updates |
Bruce Wilcox and
his software team are continuing to develop the CALRES Phase II algorithms to be used for CASE measure
analysis.
|
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