green building concept.

1. CONCEPTS OF GREEN HOUSING
Prof. Nitesh Asvadiya
Growmore School of Architecture.
Gujarat, India

2. What is “Green Housing”???
 Green Housing is a type of housing designed to be environmentally friendly and sustainable.
 Focuses on efficient use of energy, water and building materials.
 Type of housing that is built in order to conserve energy or water; improve indoor air quality; use
sustainable, recycled or used materials and produce less waste in the process.
 Reduces or eliminates the adverse effect of buildings on environment and occupants.
 Environmentally responsible and resource efficient buildings are becoming an integral part and
future of the construction industry.
 Sustainability in a real estate context is not only limited to energy conservation but also includes
use of resources, impact on the surrounding environment and living conditions for the
inhabitants.

3.  Green building incorporates sustainable features like efficient use of water, energy, use of
renewable energy and recyclable materials, effective use of landscapes and building
management systems.
 A green building creates less waste and provides a healthier living environment.
 India’s growing housing sector is one of the highest contributors to the country’s carbon
emissions accounting for 22% of India’s total annual carbon emission.
 Buildings account for upto 40% of the total energy consumption in India, of which residential real
estate accounts for over 60% of it. Hence, it is important to move towards green housing.

5. Optimal allocation of land
Built Environment
Buildings Surroundings
Efficient appliances and fixtures
Choice of materials
Location of Building
Smart Buildings (bldgs. as
generators of energy)
Transport systems and
infrastructure
Environmental management -
Water & waste
Energy security – renewable
sources and energy efficiency
Elements:

6. Advantages of Green Housing:
 Health and Wellness- Data from several researchers have shown that respiratory problems drop
in green buildings.
 Environment friendly- Saves huge amount of resources like power and water, use of renewable
resources for construction, waste efficiency, reuse and recycling, etc.
 Increased revenue- For both end user and developer. Added cost of LEED (Leadership in Energy
and Environmental Design) certification is about 2%-5% of overall cost of a building. Developer
can charge a premium for “Green Building” certification and the consumer will, in turn, have
higher resale value and higher rental yields.
 Lower Costs- Green building saves 30%-40% of the power consumption. Hence reduced
electricity bills will bring in huge savings.
 Government Incentives- Tax and premium rebates for buildings that meet certain minimum
conditions under rating programs; many states in India offer incentives to developers by extra FSI

7.  Marketing Tool- Builders can add Green Building certification to their list of credentials to attract
more customers and investors, as well as draw interest to their projects.
 Environmental Benefits: Reduce Wastage of Water
Conserve Natural Resources
Improve air and water quality
Protect bio-diversity and Ecosystems
 Economic Benefits: Reduce operating cost
Improve occupant productivity
Create market for green product and services
 Social Benefits: Improve quality of life
Minimize strain on local infrastructure
Improve occupant health and comfort

9.  Additional construction cost, price constraints, difficulty in sourcing green building materials,
technologies and service providers or facilitators in India and a long gestation period makes
developers hesitant.
 Design must consider the entire supply chain- from material sourcing, energy modelling,
resource reuse, civic amenities and waste disposal.
 Buyers not keen to pay a premium for green residential projects. Lack of demand and awareness
among buyers also makes developers hesitant to invest in this segment.
 Buyers need to be convinced that total ownership cost, including maintenance, over the life
cycle of the property will actually offer significant savings.
Challenges:

10.  The overall benefits of green buildings depends on the extent to which sustainable features are
addressed in the early planning and design stage.
 A green building is most likely to succeed in its objective if sustainable features are envisioned
and incorporated right at the beginning.
 A challenge is to retrofit the existing residential buildings into reasonably energy-efficient
buildings.

11.  Sustainable Site Development
 Water Savings
 Energy Efficiency
 Materials and Resources
 Indoor Environmental Quality
 Innovation in Design
 Landscaping
 Waste Reduction
 Cost and Payoff
 Regulation and Operation
 Life Cycle Assessment
Goals of Green Housing:

12.  Choosing a building’s site and managing that site during construction are important
considerations for a project’s sustainability.
 The sustainable sites category discourages development on previously undeveloped land;
minimizes a building’s impact on ecosystems and waterways; encourages regionally appropriate
landscaping rewards smart transportation choices; controls storm-water runoff, and reduces
erosion, light pollution and construction related pollution.
 The foundation of any construction project is rooted in the concept and design stages.
 The concept stage, in fact, is one of the major steps in a project life cycle, as it has the largest
impact on cost and performance.
 In designing environmentally optimal buildings, the objective is to minimize the total
environmental impact associated with all life-cycle stages of the building project.
1.Sustainable Site Development

13.  Buildings are major users of our potable water supply.
 The goal of the water efficiency credit category is to encourage smarter use of water, inside and
out.
 Water reduction is typically achieved through more efficient appliances, fixtures and fittings
inside and water-wise landscaping outside.
 The Green Building by its design shall not disrupt the natural flows.
 Rain falling over the whole area of complex shall be harvested in full either to replenish the
ground water table in and around the building or to be utilized in the services of the building.
 Grey water from kitchenette, bath and laundry shall be treated and reused for gardening or in
cooling towers of air-conditioner.
2. Water Savings

14.  The energy and atmosphere category encourages a wide variety of energy strategies: energy use
monitoring; efficient design and construction; efficient appliances, systems and lightings; the use
of renewable and clean sources of energy, generated on-site or off-site; and other innovative
strategies.
 The solar energy at the top of a green building is harvested to supplement the conventional
energy.
 The natural light is harvested on the intermediate floors to minimize the usage of electricity.
 High efficiency windows and insulation in walls, ceilings and floors are used for the benefit of
better temperature control.
3. Energy Efficiency

15.  During both the construction and operation phases, buildings generate a lot of waste and use a
lot of materials and resources.
 This credit category encourages the selection of sustainable grown, harvested, produced and
transported products and materials.
 It promotes the reduction of waste as well as reusing and recycling, and it takes into account the
reduction of waste at a product’s source.
4. Materials and Resources

16.  It is estimated that Indians spend about 90% of their day indoor at their residences, schools and
workplaces, where the air quality can be significantly worse than outside.
 The Indoor Environmental Quality credit category promote strategies that can improve indoor
air as well as providing access to natural daylight and views and improving acoustics.
 In a designed green building the occupants shall feel as if they are in outdoor location.
 The interior and exterior designs shall go hand in hand by blending the natural and artificial
lighting and presenting transparent views wherever possible.
5. Indoor Environmental Quality

17.  This category provides bonus points for projects that use new and innovative technologies and
strategies to improve a building’s performance well beyond what is required by other credits or
in green building consideration that are not specifically addressed elsewhere in the rating
system.
 This category also rewards projects for including an Accredited Professional on the team to
ensure a holistic, integrated approach to the design and construction phase.
 Green Building Rating Systems provide a roadmap for measuring and documenting success for
every building type and phase of building lifestyle.
6. Innovation in Design

18.  The landscaping and the exterior design in a green building shall be in such a way that there is
more shaded area, the light trespass is eliminated and local species of plants are grown.
7. Landscaping

19.  Green architecture also seeks to reduce waste of energy, water and materials used during
construction.
 Well designed buildings also help reduce the amount of waste generated by the occupants as
well, by providing on-site solutions such as compost bins to reduce waste.
8. Waste Reduction

20.  The most criticized issue about constructing environmentally friendly buildings is the price.
 New- appliances and modern technologies tend to cost more money.
 Most green buildings cost a premium of <2%, but yield 10 times as much over the entire life of
the building.
9. Cost and Payoff

21.  No matter how sustainable a building may have been in its design and construction, it can only
remain so if it is operated responsibly and maintained properly.
 Ensuring operations and maintenance personnel are part of the project’s planning and
development process will help retain the green criteria designed at the onset of the project.
 Every aspect of green building is integrated into the operation and maintenance phase of a
building’s life.
 The addition of new green technologies also fall in this category.
10. Regulation and Operation

22.  A life cycle assessment can help avoid a narrow outlook on environmental, social and economic
concerns by assessing a full range of impacts associated with all cradle-to-grave stages of a
process: from extraction of raw materials through material processing, manufacture,
distribution, use, repair and maintenance, and disposal or recycling.
 Impacts taken into account include, global warming potential, resource use, air pollution, water
pollution and waste.
11. Life Cycle Assessment

25.  Some people feel that they just can’t go green because it will cost them more money, but that is
really a common misconception.
 It may cost you more to get started when you are going green, because green materials and
products can be more costly, you really have to consider the type of savings that you will be able
to reap.
 You will be able to save on energy costs because going green also means conserving energy.
 You should really look at the green building as more of an investment than anything else.
 An investment that will be able to save you money, as well as an investment that will be able to
help the environment. It is a win-win situation for everyone.
Does Going Green Really Cost More?

26.  International Green Building rating systems such as LEED, BREEAM(Building Research
Establishment Environmental Assessment Method), Green Globes and Green Star are tools
developed to rate and/or quantify the performance of buildings against defined guidelines.
 Specific rating systems for residential development also have been developed. These rating
systems rely on the achievement of defined credits or points based on performance and/or
prescriptive parameters for evaluating the Green quotient of the building.
 Currently in India, there are 3 green building rating systems that are applicable to residential
development- GRIHA(Green Rating for Integrated Habitat Assessment), IGBC (Indian Green
Building Council) & BEE (Bureau of Energy Efficiency)
 All the 3 rating systems are similar in their overall intent and broad focus areas, differences lie in
the evaluation requirements of the parameters.
Rating Systems:

27.  India is currently witnessing a construction boom owing to rapid urbanization and the increased
housing and infrastructural needs of a growing population.
 When the IGBC(Indian Green Building Council) was established in 2001, one green building with
a floor area of 1858 sq.m. marked the beginning of green buildings in India. Today, more than
2100 IGBC certified buildings occupy almost 140 million sq.m.
 Following are the rating systems:
1. LEED (US)
2. BREEAM (UK)
3. CASBEE (Japan)
4. DGNB (Germany)
5. Green Star (Australia)
6. IGBC/LEED (India)
7. TERI-GRIHA (India)
8. BEE (India)

28. THANKYOU……