Net zero energy buildings are highly energy efficient buildings that produce as much renewable energy as they consume over the course of a year. They have net zero site energy, net zero source energy, net zero energy costs, and zero emissions. Buildings account for up to 40% of global energy consumption, so incorporating energy efficient design strategies can significantly reduce usage. With renewable energy sources, buildings can meet all of their energy needs. The document provides examples of design methods and materials that can be used to achieve net zero energy buildings and reduce costs, emissions, and increase comfort. It also highlights India's first net zero energy building as a case study.

2.  Net Zero Energy Buildings are highly energy efficient buildings
that will use, over the course of a year, renewable technology to
produce as much energy as they consume from the grid.
Net Zero Site Energy +
Net Zero Source Energy +
Net Zero Energy Costs +
Zero Emissions = net zero energy building.

5. Buildings are the most significant consumer of
energy, totaling up to 40% worldwide.
By incorporating energy efficient design
strategies from the outset, the building sector
can significantly reduce energy use.
Buildings can meet all of their energy needs
from renewable energy sources.

7.  to provide the detail, clear definition and fast
uptake of zero energy buildings.
 To demonstrate that an existing building is able
to achieve net energy.
 recommendations of various climatic
conditions.
 possible technical solution of energy demand
and energy produced at site.
 to achieve a considerable avoidance of emission
of carbon di-oxide.

8. Energy demand Renewable
energy share
Primary energy &
CO2 emissions
There should be a clearly
defined boundary in the
energy flow related to
the operation of the
building that defines the
energy quality of the
energy demand with
clear guidance on how to
assess corresponding
values.
There should be a clearly
defined boundary in the
energy flow related to
the operation of the
building where the share
of renewable energy is
calculated or measured
with clear guidance on
how to assess this share.
There should be a clearly
defined boundary in the
energy flow related to the
operation of the building
where the overarching
primary energy demand
and CO2 emissions are
calculated with clear
guidance on how to assess
these values.

9. • Glue laminated timber
• Green roof
• Hollow block with concrete
• Rain water harvesting system
• Solar integrated roof panels
• Natural Ventilation in Zero Energy Buildings
• Green Plaster
• HVAC System in Zero Energy Buildings

10. Glue laminated timer green roof

11. Hollow block roofing

12. Cooling Natural ventilation

13. Solar integrated roof panels HVAC system

14. Rainwater harvesting green plaster

15. Design methods:
 Active design method
1. Natural ventilation
2. Day lighting
3. Use of underground heat
 Passive design method
1. Photovoltaic power
2. Solar heat collector
3. Wind power
Zero
energy
building
Optimization of
outside
environment
Load
reduction
Optimization of
inside environment
Use of
natural
energy

16. INDIRA PARYAVARAN BHAWAN

17.  India’s first net zero energy building with a total
plinth area of 31,488 sq.m.
 Constructed with adoption of solar passive design
and energy-efficient building materials.
 Design allows for 75% of natural daylight to be
utilized to reduce energy consumptions.
 More than 50% area outside the building is a soft
area with plantation and grass.

18.  Reduce total cost
 carbon emission
 Increase comfort
 renewable energy
• Very few designers
• Initial costs can be
higher
• demand energy