Aianycecc2016

THE 2016 NEW YORK CITY ENERGY CONSERVATION CODE
Daniel H. Nall, PE , FAIA, FASHRAE, LEED Fellow, BEMP, HBDP, CPHC
COMPLIANCE PATHS
Syska Hennessy Group

CREATING EXCEPTIONAL ENVIRONMENTSwww.syska.com 2
Credit(s) earned on completion of
this course will be reported to AIA
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members and non-AIA members are
available upon request.
This course is registered with AIA
CES for continuing professional
education. As such, it does not
include content that may be deemed
or construed to be an approval or
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material of construction or any
method or manner of
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______________________________________
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Questions related to specific materials, methods, and
services will be addressed at the conclusion of this
presentation.

This presentation is protected by US and International Copyright laws.
Reproduction, distribution, display and use of the presentation without written
permission of the speaker is prohibited.
© Syska Hennessy Group 2015
Copyright Materials

This presentation gives a synopsis of the
requirements of the 2016 New York City Energy
Conservation Code. This code is based upon IECC
2015 but includes a number of important
amendments, including some amendments to
ASHRAE Standard 90.1-2013 that is referenced in
IECC. The presentation included a introduction to
the various compliance paths for the code and the
submission requirements.
Course Description

Learning Objectives
1. Know how the requirements of the 2016 NYCECC differ from those of the 2014
version of the code.
2. Decide which compliance path is appropriate to their project.
3. Understand which requirements are mandatory and which are prescriptive and
know the implications of the categories.
4. Recognize the project characteristics that would suggest either the Section 11 or
the Appendix G performance path approach.
At the end of the this course, participants will be able to:

6
GBCI cannot guarantee that course sessions
will be delivered to you as submitted to GBCI.
However, any course found to be in violation
of the standards of the program, or otherwise
contrary to the mission of GBCI, shall be
removed. Your course evaluations will help us
uphold these standards.
Course ID:
THE 2016 NEW YORK CITY
ENERGY CONSERVATION
CODE
By ASHRAE
Approved for:
1General CE hours
0LEED-specific hours
0920005377

NYC ENERGY CODE COMPLIANCE

Mandatory Requirement
• You have to do this no matter what
AND
Prescriptive Requirement
• If you don’t do this, you have to do an energy model that compares what
you are going to do with a similar project that does this.
OR
Performance Path
• If you don’t meet all of the prescriptive requirements, you have to create an
energy model to compare your project to a similar project that meets all of
the prescriptive requirements.
3/23/2015
SYSKA HENNESSY GROUP / 10
COMPLIANCE TERMINOLOGY

Create a spreadsheet with a checklist of all mandatory Items:
or NA
4/24/2017 11
NYCECC MANDATORY REQUIREMENTS

Envelope
• Vestibules or revolving doors for buildings ≥1000 ft2 or rooms ≥ 300 ft2
• Air barrier testing
HVAC
• Controls
– DDC (ASHRAE)
– Optimum Start
– Zone Isolation
– Demand Controlled Ventilation
• Thermal isolation of open-combustion fuel burning appliances.
Lighting
• Occupancy Sensors
• Dayight Responsive lighting controls (Both ASHRAE and IECC)
Electrical
• Maximum distribution system voltage drop (ASHRAE)
• Automatic control of receptacles (ASHRAE)
Other Equipment
• Required regenerative drive for some escalators.
Monitoring
• End-use for building (ASHRAE only) and sub-metering for tenants
NYCECC MANDATORY REQUIREMENTS
IECC AND ASHRAE

13
ENVELOPE AIR BARRIER TESTING
Mandatory

Building entrances shall be protected with an enclosed vestibule, with
all doors opening into and out of the vestibule equipped with self-
closing devices. Vestibules shall be designed so that in passing
through the vestibule it is not necessary for the interior and exterior
doors to open at the same time. The installation of one or more
revolving doors in the building entrance shall not eliminate the
requirement that a vestibule be provided on any doors adjacent to
revolving doors.
• Exceptions:
1. Non-public doors
2. Doors opening into small spaces
(defined in code)
3. Revolving doors
4. Vehicular doors
5. Doors with an air curtain
14
VESTIBULES AND REVOLVING DOORS
Mandatory

Rooms containing fuel-burning appliances, with open
combustion ducts to provide combustion air to open fuel
burning appliances shall be located outside the thermal
envelope of the building. Rooms shall be sealed and
insulated according to Table C402.1.3 for exterior walls.
Exceptions:
• Direct vent appliances with intake and
exhaust directly to the outdoors
• Certain compliant fireplaces and stoves.
15
FURNACE AND BOILER ROOMS
Mandatory – IECC Only

HVAC – DEMAND CONTROLLED
VENTILATION
Mandatory

ASHRAE 90.1-2013
• 8.4.2 requires that 50% of standard receptacles (wall plugs)
must have automatic shutoff control
IECC 2015
• C405.2.4 requires that master switches for hotel rooms to
control all permanently installed luminaires and switches
receptacles
Mandatory
AUTOMATIC RECEPTACLE CONTROLS

• More stringent than Local Law 48 of 2010
• Occupancy sensors turn lights off within 20 minutes after
all occupants leave
– Required manual operators
• Classrooms
• Conference/meeting rooms
• Employee lunch/break rooms
• Office < 200 ft2
–Allowed 100% automatic
turn-on
• Open Office
• Corridors
• Stairways
• Entrances
–Allowed 50% automatic
turn-on
• Restrooms
• Storage rooms
• Privates offices ≥ 200 ft2Mandatory
OCCUPANCY SENSORS

Electrical Submetering of Tenant Spaces
• Complies with Local Law 88 of 2009
• Requires certain tenant spaces in commercial buildings to be electrically
submetered for buildings filed after January 1, 2016
• Submeters must be installed in newly constructed commercial buildings, for the
following:
– Total electrical energy
– HVAC systems
– Interior lighting
– Exterior lighting
– Receptacle circuits
19
ENERGY METERING
Mandatory

Mandatory
ESCALATORS

Mandatory – IECC only
ADDITIONAL ENERGY EFFICIENCY
MEASURES
For New Buildings only – one of the following
• Efficient HVAC – 10% more than minimum
• Reduced Lighting Power Density – 10% less than
maximum
• Enhanced digital lighting controls
• On-site renewable energy – 0.5 W/ft2 of floor area, or
3.0% of regulated load annual energy
• Dedicated Outdoor Air System (DOAS) with energy
recovery
• Reduced Domestic Hot Water Energy – 60% from heat
recovery or solar thermal

22
LIGHTING
Mandatory

23
DAYLIGHTING CONTROLS
Mandatory

Commissioning will be required for projects that include
HVAC equipment (NYCECC)
• Greater than 40 tons of cooling capacity and greater than 600,000 Btuh
heating
• If you’re around the 14-16,000 sf mark – ask your engineer if Cx
needed
• Commissioning required for mechanical, renewable energy, and service
water heating
• Commissioning required for renewable energy systems greater than 25 kW
• Functional testing required for automatic lighting systems and control
systems.
Mandatory
COMMISSIONING

Application to Existing Buildings
• ASHRAE (4.2.1.2) allows improvements in existing buildings to offset
deficiencies in an addition to the building. IECC (401.2.1) does not.
Building Envelope
• ASHRAE includes below grade walls in Window Wall Ratio
Calculation (except for Appendix G). IEC does not.
• Slightly different definition for above grade and below grade walls.
• Thermal requirements for both opaque and non-opaque walls differ
slightly.
IECC 2015 VS. ASHRAE 90.1-2013
COMPLIANCE PATH DIFFERENCES

26
WINDOW WALL RATIO
Prescriptive

27
HVAC EQUIPMENT EFFICIENCY
Prescriptive

28
LIGHTING POWER DENSITY
Prescriptive

Semi-heated Spaces
• ASHRAE has reduced envelope performance for this space type.
IECC does not.
Building Types
• ASHRAE considers any space where people sleep as Residential. IECC
considers spaces such as hospital patient rooms and hotels as Commercial.
• In Climate Zone 4, ASHRAE residential envelope requirements slightly more
stringent than commercial.
Mechanical Systems
• ASHRAE has a more stringent requirement for thermostatic setback controls.
• ASHRAE has a larger minimum size below which automatic start controls are
required..
• ASHRAE provides economizer exception for all small CHW Fan Coils (<4.5
tons). IECC has a maximum limit on CHW system size for the exception
Prescriptive
IECC 2015 VS. ASHRAE 90.1-2013

4/24/2017 30
ASHRAE 90.1-2013 FENESTRATION
ORIENTATION
Prescriptive
ASHRAE 90.1-2013

IECC
• New Buildings Long Axis NS
• Windows with Non-metal framing
• 20% of lighting fixture replacement
without controls improvements
• Tenant or owner with aversion to
controlled receptacles
• Tenant fit-out in a building will a
Window Wall Ratio less than 30%
(no daylighting controls)
Prescriptive
IECC or ASHRAE
ASHRAE
• Windows with metal framing
• Data centers for PUE compliance
• Non-compliant building addition
with deficit made-up by
improvements to existing building
• Building with large area of below
grade walls and highly glazed
above grade walls
WHICH PATH TO USE

IECC
• Trade-offs are for U-value variations above and below
maximum.
• Trade-offs are based only on arithmetic averaging
ASHRAE
• Trade-offs are among all characteristics on the building
envelope, including
– U-value variation of opaque and transparent areas
– SHGC variation of transparent areas
– Window wall ratio
– Presence of daylighting controls
– Excessive window-wall ratio
• Trade-offs use coefficients from extensive modeling testing to
determine relative weights of variations from required
maximum values
ENVELOPE TRADE-OFF – COMCHECK

ASHRAE 90.1-2013
• Arithmetic averaging of lighting power densities in all spaces, using
space-by-space method
• Allowances for daylight responsive lighting controls
LIGHTING SYSTEMS TRADE-OFF– COMCHECK

These requirements were part of the 2011 NYCECC, but were often
ignored
• For buildings with 24 hr. occupancy, a large service water heating
load, and a large evaporative heat rejection load (cooling towers),
condenser water heat recovery for service water preheat is
required
• Waterside economizer heat exchangers must be in series with and
upstream of chillers, so that they can provide partial cooling even
when they can’t meet the full load.
• Waterside economizers must meet the entire building cooling load
when outdoor conditions are 50°F dry bulb and 45°F wet bulb, or
colder.
• Furniture mounted task lighting is not included in the required
maximum space Lighting Power Density calculations.
PRESCRIPTIVE PATH ALERTS

PERFORMANCE PATH
ENERGY MODELING

Performance Path is the only mechanism to achieve trade-offs
across systems to achieve energy code compliance.
Most common reasons for resorting to Performance Path:
• Window wall ratio greater than 40%
• Buildings that do not conform to the fenestration orientation prescription
(ASHRAE 90.1-2010, 5.5.4.5)
• Building that don’t comply with the pipe-sizing criteria.
• Buildings that rely on complex external solar shading strategies.
• Buildings that rely on thermal storage for significant energy cost reduction.
PERFORMANCE PATH
ENERGY MODELING

Demonstrate that the Proposed Design has a lower
energy cost than a code compliant Baseline
building.
• Design Energy Cost determined by an energy model
that accurately incorporates the systems and
components of the Proposed Building Design.
• Baseline Energy Cost determined by an energy model
that modifies the Proposed Building Design to meet
minimally the Prescriptive Requirements specified in
the Energy Code.
• Non-regulated input parameters for the models are
identical:
– Weather data
– Schedules and occupancy descriptions
– Utility rate structures
• Section 11 and Appendix G calculate the Baseline
Energy Cost in different ways.
PERFORMANCE PATH
ENERGY MODELING

Section 11 Energy Cost Budget Baseline Building
• HVAC system of Budget Building similar to Proposed Design
• Orientation of Budget Building is the same as the Proposed Design;
rotation required if fenestration orientation not met.
• Requires on 1400 hour simulation (condensed weather data).
• Baseline fan system energy same as proposed, up to a limit
• Baseline window wall ratio same as proposed, up to a limit
PERFORMANCE PATH
ENERGY MODELING

Appendix G: Performance Rating Method Baseline Building
• HVAC system of Baseline Building more typical of building type
• Normalizes for orientation by averaging models of Baseline Building
at 0°, 90°, 180°, and 270° rotations.
• Requires 8760 hour simulation
• Formalizes Exceptional Calculation Method
• Uses Building Performance Factors to modify Regulated Load EUI of
Baseline Building conforming with ASHRAE 90.1-2004
• Specified baseline building window wall ratio per building type
• Calculated baseline building fan energy
PERFORMANCE PATH
ENERGY MODELING

40
ECB – Design Dependent
Appendix G – Design Independent

Appendix G: Performance Rating Method
• Baseline Building component performance requirements less
stringent than prescriptive path
• Lighting controls for paragraph 9.4.1 mandatory requirements
• Building Window Wall Ratio assigned by type of building
• Building Performance Factors given for different building types in
different climates.
• As ASHRAE 90.1 evolves, new Building Performance Factors (BPF)
will be calculated to reflect increased stringency of prescriptive
requirements.
THE “NEW” APPENDIX G – PERFORMANCE COST

42
THE “NEW” APPENDIX G – WINDOW WALL RATIO

Proposed Building Cost Index is equal or less than Target Energy Cost Index
- PCIPB ≤ PCIT
PROPOSED BUILDING COST INDEX
PCIPB = Proposed Building Energy Cost/ Baseline Building Energy Cost
TARGET ENERGY COST INDEX
PCIT = (BBUEC + BPF * BBREC)/Baseline Building Annual Energy Cost
Where:
• BBUEC = Baseline Building Unregulated Energy Cost. The portion of the annual
energy cost of a baseline building design that is due to unregulated energy use.
• BBREC = Baseline Building Regulated Energy Cost. The portion of the annual energy
cost of a baseline building design that is due to regulated energy use.
• BPF = Building Performance Factor from Table 4.2.1.1.
ALGEBRA –
Proposed Building Annual Energy Cost ≤ (BBUEC + BPF * BBREC)
43

Section 11
• When building orientation is unfavorable, because Section 11 does
not require rotation of baseline case; unless fenestration orientation
not met, then rotation required
• When performance improvements are made to an existing building to
offset the impact of a non-compliant addition
Appendix G
• When daylight responsive lighting controls are especially effective
• When proposed building window wall ratio is less than baseline ratio
in Table G3.1.1-1
• When Building Performance Factor is favorable
Pick Most Favorable Baseline Case
WHEN TO USE APPENDIX G VS. SECTION 11

Section 11 Energy Cost Budget vs. Appendix G
Performance Rating Method
BASELINE CASE MECHANICAL SYSTEMS
ENERGY MODELING

648
592
671
671
417
404
417
404
252
294
267
270
151
151
- 500 1,000 1,500 2,000 2,500 3,000
ASHRAE Baseline
As-Designed
Thousands
Annual Energy Cost ($/yr)
Area Ltg Equipment Space Htg Space Clg HeatRej/Pumps Fans DHW
SUCCESS
PERFORMANCE PATH
ENERGY MODELING

QUESTIONS

Dan Nall, FAIA, P.E., FASHRAE, LEED Fellow, BEMP, HBDP, CPHC
Vice President
Thank You

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