Item 4-PresentationCALGreen Reach Codes
Tiers 1 and 2
August 29, 2019
City of Cupertino Sustainability Commission
Walker Wells
What is CALGreen?
CALGreen is the first mandatory green building standards code
established in 2007 by the CBSC to meet the GHG reduction
goals of AB 32.
Updated in 3-year cycles –the 2019 code goes into effect
January 1, 2020.
CALGreen governs:
1.Planning and Design
2.Energy Efficiency +Title 24, Part 6 Energy Code
3.Water Efficiency and Conservation
4.Material Conservation and Resource Efficiency
5.Environmental Quality
Applicability:
1.Residential New Construction -Low-Rise residential
(1-3 stories)
2.Nonresidential New Construction -High-Rise (4+
stories) Residential and Mixed-Use projects,
Hotel, Office, Retail
3.Major Remodels as defined in the Municipal Code 2
CALGreen Residential Tier 1 & 2 Requirements
Tier 1
•A4.106.2.3 Topsoil protection
•20% of the total parking, walking, or patio surfaces shall be permeable
•A4.106.5 Specified Cool Roof material (values determined by slope design)
•15% of total spaces EV capable
•Two elective measures from Section A4.1 Planning & Design
•Energy: 15% better than Title 24 and EE requirements in Sections A4.203.1.1.1, Table A4.203.1.1.1, A4.203.1.1.2, A4.203.1.3.1, A4.203.1.4
•Two elective water efficiency & conservation measures form Section A4.3
•20% cement reduction (fly ash, slag, etc.)
•10% recycled content requirements A4.405.3
•Divert 65% of construction waste
•Two elective measures from A4.4 Materials Conservation & Resource Efficiency
•90% resilient flooring systems requirement
•Quality Insulation Installation (QII) site inspection
•One elective measure from A4.5 Environmental Quality
Tier 2
•A4.106.2.3 Topsoil protection
•30%of the total parking, walking, or patio surfaces shall be permeable
•A4.106.5 Specified Cool Roof material (values determined by slope design)
•20%of total spaces EV capable
•Four elective measures from Section A4.1 Planning & Design
•Energy: EDR of zero –All measures from Division A4.2 Energy Efficiency
•Three elective water efficiency & conservation measures form Section A4.3
•25%cement reduction (fly ash, slag, etc.)
•15% recycled content requirements A4.405.3
•Divert 75% of construction waste
•Four elective measures from A4.4 Materials Conservation & Resource Efficiency
•100%resilient flooring systems requirement
•Quality Insulation Installation (QII) site inspection
•One elective measure from A4.5 Environmental Quality
3
CALGreen Nonresidential Tier 1 & 2 Requirements
Choose one of the following Prerequisites for Tier 1 and two for Tier 2:
•A5.203.1.1.1 Outdoor lighting
•A5.203.1.1.2 Service water heating in restaurants
•A5.203.1.1.3 Warehouse Dock Seal Doors
•A5.203.1.1.4 Daylight Design Power Adjustments Factors
•A5.203.1.1.5 Exhaust Air Heat Recovery
Energy Performance Approach (A5.203)
•Nonresidential: Tier 1 is 10% and Tier 2 is 15% better than CALGreen
•High-rise residential and hotel/motel: Tier 1 is 5% and Tier 2 is 10%better than CALGreen
EVs & Clean Air Vehicles
•EV: Tier 1 is based on the number of spaces up to 8% and Tier 2 is up to 10%of spaces
•Clean Air Vehicle Designated Parking Spaces: Tier 1 is 10% and Tier 2 is 12%of spaces
Water Calculations
•Tier 1: 12% reduction from baseline
•Tier 2: 20%reduction from baseline
4
Implementation/Enforcement
Assume City staff is responsible for
implementation -
CALGreen Tiers can be incorporated
into plan check process with pre-
made checklists
5
Tier 1 & 2 Energy Performance Pathways
Hotel
5 floors 144 rooms
Office
4 floors 71,500 sq ft
Mixed Use
4 floors 150 units
Mixed Use
22 floors 80 units
Measure TDV EUI % Better Measure TDV
EUI % Better Measure TDV
EUI % Better Measure TDV
EUI % Better
Mechanical SystemsRDHW Solar Fraction 0.2 101.65 0.14%DHW Water Heater from
Electricity to HP
109.72 4.21%RDHW Solar Fraction 0.2 72.91 5.90%RDHW Solar Fraction 0.2 Not yet modeled
RDHW Solar Fraction 0.4 101.5 0.28%Increase DX Efficiency
(EER 9.8 to 10.2)
112.12 2.11%RDHW Solar Fraction 0.4 69.16 10.74%RDHW Solar Fraction 0.4 45.71 4.09%
Exhaust Driven
Ventilation
Not yet modeled Fan Efficiency (65% to
70%)
108.14 5.59%Exhaust Driven
Ventilation
71.67 7.50%Exhaust Driven
Ventilation
45.66 4.20%
Fan Efficiency (50% to
65%)
93.89 7.76%CW Loop Tem Control set
to Web Bulb Reset
Hot Water Loop set to
'outside Air Reset'
99 13.57%Fan Efficiency (50% to
65%)
70.02 9.63%Fan Efficiency (50% to
70%)
43.11 9.55%
Increase Chiller
Efficiency (0.5 kW/ton)
99.15 2.59%Change System to
Chiller/Boiler plant
100.74 12.05%Gas Boiler Efficiency
(95%)
77.43 0.06%Gas Boiler Efficiency
(95%)
45.3 4.95%
Change to Condensing
Boiler
99.84 1.92%Boiler Efficiency (80% to
92%)
112.57 1.72%Increase Chiller
Efficiency (0.5 kW/ton)
Not yet modeled Increase Chiller
Efficiency (0.5 kW/ton)
46.27 2.92%
Change System to mini
split system (SZHP)
122.87 -20.71%Change to Condensing
Boiler
113.22 1.15%Change System to mini
split system (SZHP)
Not yet modeled Change System to mini
split system (SZHP)
53.55 -12.36%
Change System to SZHP:
high eff SEER 19
Not yet modeled Change System to SZHP:
high eff SEER 19
47.08 1.22%EnvelopeWall: U-value: Non Res-
0.052, Res-0.059
101.48 0.30%Wall U value: 0.052 113.76 0.68%Wall: U-value: Non Res-
0.069, Res-0.058
77.52 -0.05%Glazing: U value 0.36,
SHGC 0.22, VT 0.42
43.69 8.33%
Roof: U-value: Non Res-
0.034 Res-0.026
101.78 0.01%Roof U value: 0.026 113.36 1.03%Roof: U-value: Non Res-
0.034 Res-0.026
77.2 0.36%Wall: U-value: Non Res-
0.069, Res-0.058
45.72 4.07%
Glazing: U value 0.30,
SHGC 0.22, VT 0.60
100.61 1.16%Glazing: U value 0.30,
SHGC 0.22, VT 0.60
111.72 2.46%Glazing: U value 0.30,
SHGC 0.22, VT 0.60
76.82 0.85%Roof: U-value: Non Res-
0.034 Res-0.026
45.63 4.26%
Glazing: U value 0.26,
SHGC 0.20, VT 0.70
100.32 1.44%Glazing: U value 0.26,
SHGC 0.20, VT 0.70
110.26 3.74%2 ft overhang on each
window
77.05 0.55%2 ft overhang on each
window
41.55 12.82%
2 ft overhang on each
window
101.41 0.37%2 ft overhang on each
window
111.4 2.74%Non-Res LPD decrease
10%
75.86 2.09%Non-Res LPD decrease
10%
44.8 6.00%
3.5 ft overhang on each
window
101.68 0.11%3.5 ft overhang on each
window
110.22 3.77%
Reduce LPD 0.6 W/sf to
0.55 W/sf
112.73 1.58%6
Cost Considerations
7
Measure Baseline T24 Requirement
Measure Applicability
Incremental Cost Sources & NotesMed
Office
Med
Retail
Small Hotel
Guest rooms Comm Spaces
Envelope
Modify SHGC Fenestration SHGC of 0.25 ●●●●
$1.60 /ft2 window for SHGC
decreases, $0/ft2 for SHGC
increases
Costs from one manufacturer.
Fenestration as a Function
of Orientation
Limit on total window area and
west-facing window area as a
function of wall area.
●$0 No additional cost associated with the measure which is a design
consideration not an equipment cost.
HVAC and SHW
Drain Water Heat Recovery No heat recovery required ●$841 /unit Assume 1 heat recovery unit for every 3 guestrooms. Costs from three
manufacturers.
VAV Box Minimum Flow 20 percent of maximum (design)
airflow ●●$0 No additional cost associated with the measure which is a design
consideration not an equipment cost.
Economizers on
Small Capacity
Systems
Economizers required for
units > 54,000 Btu/hr ●$2,857 /unit Costs from one manufacturer’s representative and one mechanical
contractor.
Solar Thermal Hot Water
For central heat pump water
heaters, there is no prescriptive
baseline requirement.
●(electric only)$33/therm-yr
Installed costs reported in the California Solar Initiative Thermal Program
Database, 2015-present.8 Costs include tank and were only available for gas
backup systems. Costs are reduced by 19 percent per federal income tax
credit average through 2022.
Gas space heating and
water heating ●●10-15%
Large packaged rooftop
cooling ●●10-15%
Single zone heat pump space
heating
●6-15%
Heat pump water heating ●●●None (market does not
carry 2.0 UEF)
Lighting
Interior Lighting Reduced
LPD
Office area 0.60 –0.70 W/ft2
depending on area of space. Hotel
function area 0.85 W/ft2. Retail
Merchandise Sales 1.00 W/ft2 ●●─●$0
Industry report on LED pricing analysis shows that costs are not correlated
with efficacy.9
CEC 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study
Palo Alto, CA
Low-rise Residential•Minimum one or the other: (1) 10% less than standard design with no PV
or (2) 20% less than standard design if building includes a PV system•Solar: required for single family•New: CALGreen Tier 2; Alterations: Tier 1 (excluding EE)
High-rise Residential•Minimum one or the other: (1) 10% less than standard design with no PV
or (2) 12% less than standard design if building includes a PV system•New: CALGreen Tier 2; Alterations: Tier 1 (excluding EE)
Nonresidential & Mixed Use•Minimum one or the other: (1) 10% less than standard design with no PV
or (2) equal to standard design with PV system•New: CALGreen Tier 2; Alterations: Tier 1 (excl. EE)•If >$100,000: EPA Portfolio Manager, projects >10,000 sq ft: performance
review
8
Sunnyvale, CA
Low-rise Residential
•CALGreen + GreenPoint Rated & verified with min. of 90 points
High-rise Residential•CALGreen + GreenPoint Rated & verified with min. of 90 points•Build It Green certification
Nonresidential
≤ 5,000 sq ft: CALGreen mandatory measures
>5,000 sq ft –30,000 sq ft: CALGreen + LEED Gold certification
>30,000 sq ft: CALGreen + LEED Gold certification with USGBC
Certification and
Design Phase credits reviewed by USGBC
9
Mountain View, CA (SVCE model)
Low-rise Residential
•Mixed fuel: 25% better than CALGreen
•Electrification readiness
•3 or 5 kW PV
High-rise Residential
•Mixed fuel: 7% better than CALGreen
•Electrification readiness
•3 or 5 kW PV
•MFR: 100% EV Ready
Nonresidential
•Office mixed fuel: 14% better than CALGreen & electrification readiness
•Retail mixed fuel: 14% better than CALGreen & electrification readiness
•3 or 5 kW PV
•Office -10% spaces EVSE installed, 10% spaces EV Ready, 30% spaces EV Capable
•Other Nonres -6% spaces EVSE, 5% spaces L1 EV Ready
10
Reach Code Comparisons
Type EE ZNE Solar EV Low-Rise Residential High-Rise Residential Nonresidential Mixed-Use
2019
CALGreen
Tier 1
EE, EV +
green
measures
X X
-15% better than CALGreen
-15% spaces EV capable
-5% better than CALGreen
-15% spaces EV capable
-Nonres: 10% better than CALGreen
-Hotel/motel: 5% better than CALGreen
-Up to 8% of spaces EV capable
-12% reduction in baseline water use
-As applicable
for each
component
2019
CALGreen
Tier 2
EE, EV +
green
measures
X X
-EDR = 0 and all EE measures
-20% spaces EV capable
-10% better than CALGreen
-20% spaces EV capable
-Nonres: 15% better than CALGreen
-Hotel/motel: 10% better than
CALGreen
-Up to 10% spaces EV capable
-20% reduction in baseline water use
-As applicable
for each
component
Silicon
Valley
Clean
Energy
CALGreen
2019
Solar, EE,
EV
X X X
-Mixed fuel: 25% better than CALGreen
-Electrification readiness
-3 or 5 kW PV
-Mixed fuel: 7% better than CALGreen
-Electrification readiness
-3 or 5 kW PV
-MFR: 100% EV Ready
-Office mixed fuel: 14% better than
CALGreen & electrification readiness
-Retail mixed fuel: 14% better than
CALGreen & electrification readiness
-3 or 5 kW PV
-Office -10% spaces EVSE installed,
10% spaces EV Ready, 30% spaces EV
Capable
-Other Nonres -6% spaces EVSE, 5%
spaces L1 EV Ready
11
1.Is energy efficiency the priority, or are there
other issues that should be given
consideration?
GHG emissions reductions vs. energy efficiency?
2.How can the reach code best support the
climate action plan?
3.How should we conduct effective outreach?
Commission hosted public meeting?
Who should be involved?
12
Questions for
Discussion