Pages From ECBC-Code

INTRODUCTION
Energy Efficient Buildings
11
ABOUT ECBC 2017
Why Comply
Legal
Requirements
Energy
Long-Term
Savings for
Benefits
Project
ECBC
2017
Source: AEEE, 2017 18

ABOUT ECBC 2017
Compliance Options
Building Systems Compliance Options
o Building Envelope
 Prescriptive
o Mechanical systems method
and equipment,
Requirements 
Mandatory
including HVAC and
water heating
 Building trade- Energy
off method
o Lighting
Code
 Whole-building Compliance
o Electrical power,
motors, and performance
renewable energy method
23
ABOUT ECBC 2017
Applicable Building Systems
Building components Components not

covered by
covered by ECBC ECBC
ECBC 2007 ECBC 2017 ECBC 2017
• Building envelope; • Building envelope; • Plug loads;

• HVAC; • Mechanical systems, • Equipment that uses
• Lighting; including HVAC, energy for
• Power; water heating; manufacturing
• Water heating; • Lighting; processes;
• Electric power and • Parts of the building
• Other.
renewable energy. that use energy for
manufacturing
processes.
Notes:
HVAC - Heating Ventilation and Air Conditioning 25
ABOUT ECBC 2017
Applicable Building Systems
Building
Envelope;
Mechanical
systems;
HVAC;
Water heating;
Lighting;
Electric power;
Renewable
energy.
HVAC – Heating, Ventilation and Air-Conditioning;

SHGC – Solar Heat Gain Coefficient;
VLT – Visible Light Transmittance
26
ABOUT ECBC 2017
ECBC building classifications
Health Shopping
Business
Care Facilities
Small
Offices Shopping
Hospitals (<10,000 Malls
m2) Education
Hospitality Assembly Stand-alone
Out-patient Medium
Healthcare Schools Retails
Offices
(10,000-
No-star 30,000 m2)
Hotels Theatre Open
Gallery
Colleges Malls
Transport Large
Resort Service Office Super
Facilities (>30,000 Universities Markets
m2)
Star Hotel
Multiplex Training
Institutions
27
ABOUT ECBC 2017
Lighting. ECBC requirements
Lighting is largest electricity consuming end-user within a building in India.
ECBC 2017 sets minimum requirements for light

power density (LPD) of buildings and lighting
control systems;
Maximum LPD defined as per application area as

W/m2;
Occupancy sensor to automatically switch on/off the

lights in buildings >20,000 m2 after 15 minutes of
inactivity;
90% of interior lighting of buildings with area >300

m2 should have automatic control systems
LPD – Lighting Power Density
30
Credit: PNNL
ABOUT ECBC 2017
Lighting. Savings
The lower the LPD value, the higher will be savings;
Compared to ECBC 2007 minimum requirements, on average ECBC 2017
will deliver following savings in lighting (savings can be higher for typical
buildings):
ECBC 2017 ECBC + Super ECBC
15% 32% 56%
18
16
Lighting Power Density (W/m2)
ECBC 2007 ECBC 2017 ECBC+ SuperECBC

16
14 14
14 13 13
12
12 11 11 11 11
10 10 10 10
10 9
8 8 8
8 7
6 6
6 5 5 5
4
2
0
Retail/Mall Religion Hospitals University and Office Hotel
building Schools
31
ABOUT ECBC 2017
Space Conditioning
ECBC encourage optimal size/capacity of

HVAC systems, which helps decrease energy
costs;
Equipment should meet minimum efficiency

standards in terms of coefficient of
performance (COP) for all tiers of compliance;
Time clock provisions;
Controls for cooling towers, condenser fans,

chilled water pumps;
Use of economizer;
Insulation requirements for the pipes and ducts
Credit: Trane, PNNL 32

ABOUT ECBC 2017
Comfort Systems
Natural ventilation should comply with

guidelines of the National Building
Code (NBC) and have at least 3-star
rated ceiling fans;
Mechanical ventilation systems should
ensure air change rate in accordance
with NBC and should have CO sensors
for car park space > 600 m2;
Buildings with area >50 m2, with

occupant density >40 people per 100
m2 should have demand control
ventilation
Credit: PNNL, DOE EERE 33

ABOUT ECBC 2017
Building Management Systems and Controls
Educational and commercial buildings with area >20,000 m2 and

mechanical cooling and heating systems should have building
management systems and control systems including:
Timeclock;
Occupancy control;
Fan controls;
Picture above:
Honeywell building energy management
system at ECBC pilot building in
Gujarat.
Temperature controls;
Credit: PNNL, Ingersoll Rand 34

ABOUT ECBC 2017
Electrical Systems
Transformers
Power transformers should have efficiency
at least 50%;
Maximum loss values specified for different
types and classes of transformers;
Motors
Power of motors should not > 20% of the
calculated maximum load;
Diesel Generators for buildings >20,000 m2 should
have following ratings (BEE rated):
ECBC ECBC + Super ECBC

>3 stars >4 stars >5 stars
Credit: GE Grid, Directindustry 35

ABOUT ECBC 2017
Service Water Heating
ECBC 2017 encourages maximum energy efficiency and heat recovery

utilization (for example, condensers of AC units);
Insulation required for the entire hot water system including the storage
tanks and pipelines;
Heating systems that should meet or exceed

MIN requirements set in Indian Standards:
 Solar water heaters;
 Gas instantaneous water heaters;
 Electric water heaters;
Gas heaters should be used where gas

is available;
Electric systems should be used as last
resort;
Credit: Energy.gov 36
ABOUT ECBC 2017
Solar Water Heating
Solar water heaters minimum design

requirements;
Applies to Hotels and Hospitals in

all climatic zones and all buildings
in cold climate zone;
Minimum provisions of Solar water

heaters:

Floor area Floor area Regardless of Regardless of
< than 20,000 m2 > 20,000 m2 building floor area building floor area
At least 20% At least 40% At least 40% At least 60%
of total hot water design capacity
Credit: DOE EERE/PNNL 37

ABOUT ECBC 2017
Renewable Energy Systems
All buildings should have >25% of

dedicated space (rooftop or the site) for
installation of renewable energy systems
in the future;
All buildings should have Renewable

Energy Generating Zones (REGZ) for
installing solar PV on rooftops or on site:
1% 2-3% 4-6%
of total electricity load
REGZ should be free from obstructions

and shadows.
Credit: PNNL, 2014 38

ABOUT ECBC 2017
Linkage with Other Programs
Voluntary building rating programs in India references ECBC for

energy requirements:
Green Rating for Integrated Habitat Assessment (GRIHA)
BEE Star Rating
India Green Building Council (IGBC) Rating
Leadership in Energy and Environmental Design (LEED)
These green building programs encourage the Indian building sector go

beyond the mandatory requirements from ECBC.
39

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INTRODUCTION

Energy Efficient Buildings

Source: AEEE, 2017 18

Building Systems Compliance Options

Building components Components not

ECBC 2007 ECBC 2017 ECBC 2017

• Building envelope; • Building envelope; • Plug loads;

HVAC – Heating, Ventilation and Air-Conditioning;

Lighting is largest electricity consuming end-user within a building in India.

ECBC 2017 sets minimum requirements for light

Maximum LPD defined as per application area as

Occupancy sensor to automatically switch on/off the

90% of interior lighting of buildings with area >300

ECBC 2007 ECBC 2017 ECBC+ SuperECBC

ECBC encourage optimal size/capacity of

Equipment should meet minimum efficiency

Time clock provisions;

Controls for cooling towers, condenser fans,

Insulation requirements for the pipes and ducts

Credit: Trane, PNNL 32

Natural ventilation should comply with

Buildings with area >50 m2, with

Credit: PNNL, DOE EERE 33

Educational and commercial buildings with area >20,000 m2 and

Credit: PNNL, Ingersoll Rand 34

ECBC ECBC + Super ECBC

Credit: GE Grid, Directindustry 35

ECBC 2017 encourages maximum energy efficiency and heat recovery

Heating systems that should meet or exceed

Gas heaters should be used where gas

Solar water heaters minimum design

Applies to Hotels and Hospitals in

Minimum provisions of Solar water

ECBC ECBC + Super ECBC

Credit: DOE EERE/PNNL 37

All buildings should have >25% of

All buildings should have Renewable

REGZ should be free from obstructions

Credit: PNNL, 2014 38

Voluntary building rating programs in India references ECBC for

These green building programs encourage the Indian building sector go

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