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1

Green buildings aim for several or all of the following features . . . .

Green buildings aim for several or all of the following features:

• Substantially reduce energy requirements

• Conserve water

• Maximize natural light and views

• Maximize fresh air circulation

• Minimize high energy heating/cooling

• Rainwater harvesting for flushing and irrigation

• Recycled materials

• Flexible, sustainable designs that can endure for a hundred years and more

2

List 3 examples of green design?

A building can be orientated with its narrow, long axis east-west so that most windows face the abundant natural light from the north and the south. Such an orientation can be achieved at little or no marginal cost compared to traditional designs that merely face the street.

 

Adding triple-glazed windows helps retain warmth in the winter, and fully operable windows allow for fresh air and cross or stack ventilation in the summer, which optimizes natural lighting, heating, and cooling.

 

In summer, louvered shades on the south elevation can reduce glare and substantially improve natural lighting. These also reduce heating and cooling costs with less reliance on expensive heating, ventilation, and air-conditioning systems, and thus lower energy costs.

3

COMPLETE THE SENTENCE

 

The goals of sustainable building design have evolved. Initial efforts focused on _ _ _ _ _

 

Sustainability initiatives now also recognize _ _ _ _ _ _

 

A number of North American case studies have demonstrated that sustainable building design can significantly improve _ _ _ _ _

The goals of sustainable building design have evolved. Initial efforts focused on reducing carbon emissions associated with building construction and improvements in energy efficiency. 

 

Sustainability initiatives now also recognize the potential benefits for building occupants.

A number of North American case studies have demonstrated that sustainable building design can significantly improve occupant comfort and productivity' — which should ideally translate to more satisfied tenants and better marketability.

4

Examples of sustainable building practices include . . .  list 3 . . . 

Examples of sustainable building practices include:

• Thermally efficient roofs, walls, and windows that reduce heating loads and enhance thermal comfort.

• Building shape and orientation, thermal mass and day lighting strategies that reduce cooling loads.

• Installing "green roofs" on top of buildings and "green walls" along the hot western façades, assisting in mitigating heat loss and gain.

• Significantly smaller HVAC systems and efficient electrical lighting strategies that capitalize on day lighting.

• Water efficient supply and waste fixtures.

• Adaptable interior designs, providing visual access to the outdoors and access to daylight. [The need to improve natural light and indoor air quality becomes apparent when it is reported that Canadians spend 90% of their lives indoors.]

• Interior finishes and installation methods having lower VOC (volatile organic compound) emissions.

• Landscaping strategies that require little or no irrigation permit groundwater replenishment and provide on-site storm water management.

• Siting to minimize stress on natural systems either by building on previously contaminated sites or avoiding ecologically sensitive areas.

5

Discuss Green Roof Technology

A membrane covered with about 100cm of soil can be seeded with drought-resistant native plants. These areas can help retain rainwater runoff during the wet season and irrigate vegetation with recycled water during the dry months. They also help to protect the roof or wall membrane from degradation due to exposure to pollution and the elements.

6

Lighting Design

Open floor plans and the orientation of the office workspace near natural light reduce the overall requirement for lighting. A current office space design trend is the move away from overall general lighting towards more focused LED lamps for more efficient task lighting at each workstation.

Lighting Design

Open floor plans and the orientation of the office workspace near natural light reduce the overall requirement for lighting. A current office space design trend is the move away from overall general lighting towards more focused LED lamps for more efficient task lighting at each workstation.

7

LIGHTING DESIGN

Energy efficient lamps for fluorescent, sodium vapour, and other lighting: a new generation of fluorescent lamps with electronic ballasts are replacing conventional magnetic lamps. The main advantage of electronic ballasts is that they are more efficient in converting incoming electricity to the required amount to power fluorescent bulbs, than the older magnetic ballasts.

LIGHTING DESIGN

Energy efficient lamps for fluorescent, sodium vapour, and other lighting: a new generation of fluorescent lamps with electronic ballasts are replacing conventional magnetic lamps. The main advantage of electronic ballasts is that they are more efficient in converting incoming electricity to the required amount to power fluorescent bulbs, than the older magnetic ballasts.

8

LIGHTING DESIGN

Energy efficient fluorescent bulbs: fluorescent bulbs are classified by the diameter of the bulb (e.g., T-8 is 1/8th of an inch). T-8 bulbs are now replacing T-12 bulbs for office lighting since both bulbs produce similar amounts of light, but with a significant reduction in energy costs - T-8 bulbs require 32 watts compared to the 40 watts of energy for a T-12 bulb. Another advantage is that the T-8 bulb remains brighter, longer.' The T-8 bulbs require a different ballast so a relamping project involves both the replacement of bulbs and ballasts.

LIGHTING DESIGN

Energy efficient fluorescent bulbs: fluorescent bulbs are classified by the diameter of the bulb (e.g., T-8 is 1/8th of an inch). T-8 bulbs are now replacing T-12 bulbs for office lighting since both bulbs produce similar amounts of light, but with a significant reduction in energy costs - T-8 bulbs require 32 watts compared to the 40 watts of energy for a T-12 bulb. Another advantage is that the T-8 bulb remains brighter, longer.' The T-8 bulbs require a different ballast so a relamping project involves both the replacement of bulbs and ballasts.

9

Compact fluorescent lights (CFLs): Canada is phasing out the sale of inefficient incandescent bulbs and replacing them with the more energy efficient CFLs. Incandescent bulbs have a short lifespan of 750 to 1,000 hours and use only 5% of the electricity supplied to the fixture, with a 95% heat loss, whereas CFLs last between 8,000 to 15,000 hours, use up to 75% less electricity, and generate 70% less heat. The heat generated from lighting in a large office building is a significant contributor to the HVAC cooling load, another contributor to building energy use. The additional cost of installing a CFL is more than offset by the cost of electricity to power an equivalent incandescent light bulb with more CFLs being used for task lighting and specialized lighting such as in building lobby entrances.

Compact fluorescent lights (CFLs): Canada is phasing out the sale of inefficient incandescent bulbs and replacing them with the more energy efficient CFLs. Incandescent bulbs have a short lifespan of 750 to 1,000 hours and use only 5% of the electricity supplied to the fixture, with a 95% heat loss, whereas CFLs last between 8,000 to 15,000 hours, use up to 75% less electricity, and generate 70% less heat. The heat generated from lighting in a large office building is a significant contributor to the HVAC cooling load, another contributor to building energy use. The additional cost of installing a CFL is more than offset by the cost of electricity to power an equivalent incandescent light bulb with more CFLs being used for task lighting and specialized lighting such as in building lobby entrances.

10

LED ADVANTAGES

LED (light emitting diode) lighting: LED lights offer two main advantages over fluorescent lighting, higher power output to light output (referred to as efficacy) and lower cost per lumen.

 

LED lighting is commonly found in newer office buildings in applications such as downlights, display and accent lighting, under-cabinet lighting, and workstation or task lighting.

11

DISCUSS IDP

An integrated design process (IDP) is an important aspect of most large commercial construction projects and a key ingredient in sustainable development. 

 

The IDP project team, including architects, engineers, project managers, and others, focuses on the whole building and its integrated systems and functions, rather than on individual building systems in isolation.

 

Integrated design is inclusive and iterative with identification of synergies in the design phase and extending beyond the occupancy phase. It encourages trade-offs and optimization, and identifies savings.

12

GOALS OF IDP

Goals of IDP:

• Good planning can minimize the upfront green building premium and maximize the long-term operational savings; and

• The IDP can also reduce risk by modelling alternative designs in advance for reducing energy costs and initial capital costs. This improves decision-making and lowers project risk.

13

TRUE OR FALSE?
IDP tends to be focused on development of new buildings, but it is equally applicable to renovations of existing buildings.

ANSWER:  TRUE

14

DISCUSS EFFICIENT WINDOWS

Efficient windows: natural light and thermal comfort can be improved with features such as the large-frame glazing with low-UV finishes and multiple pane glazing with gas insulated spacers. The additional expense can be offset with proper solar orientation, an improved thermal envelope with high R-value insulation in the walls and the roof, and a downsized HVAC system.

15

ARGUMENT FOR GREEN RETROFIT

The argument from sustainability advocates is that conversion of existing buildings to more sustainable design (to the extent practical) will provide tangible and intangible pay-back in the form of reduced energy costs and increased tenant satisfaction given improved working space and potentially lower costs of occupancy.

 

It is also argued that these green investments can lead to lower vacancy rates, higher rents, and improved property market value.

16

GIVE THE COST BENEFIT ANALYSIS FOR A MODERN HVAC SYSTEM

A common example of this cost-benefit analysis is HVAC. Modern HVAC systems are expensive to install but can produce immediate savings in energy costs for heating and cooling in relation to legacy HVAC systems. The other advantage of an HVAC upgrade is improved thermal comfort for building occupants. This can translate into tenants who are less likely to move, meaning a lower low-term vacancy. A landlord has multiple options for HVAC upgrades — each option comes with a different capital cost and expected annual reduction in operation expenses.

17

Modern buildings are designed to offer flexibility to improve their usability and enhance their appeal to tenants. New steel framing technologies eliminate the requirement for interior steel columns while concrete framing technology continues to improve leading to fewer interior columns and more versatile building shapes. The result is the ability to provide more flexibility to occupants in interior office or store design adaptive re-uses.

Modern buildings are designed to offer flexibility to improve their usability and enhance their appeal to tenants. New steel framing technologies eliminate the requirement for interior steel columns while concrete framing technology continues to improve leading to fewer interior columns and more versatile building shapes. The result is the ability to provide more flexibility to occupants in interior office or store design adaptive re-uses.

18

Sustainable building retrofits may include some or all of the following systems and design features to improve energy efficiency:

Sustainable building retrofits may include some or all of the following systems and design features to improve energy efficiency:

Re-lamping lighting with energy efficient T-8 and LED lights

 

Task ambient lighting with smart switches (motion detector sensors) to automatically turn lights on and off

 

Direct digital controls for optimal management of all building systems

 

Low emissivity glazing and/or interior-exterior solar shading

 

Under-floor ducting and ventilation systems

 

Daylighting or open design with removal of interior partition walls

 

Use of high efficiency fan motors and heat pumps

19

Discuss Efficient Window Systems

Efficient windows: natural light and thermal comfort can be improved with features such as the large-frame glazing with low-UV finishes and multiple pane glazing with gas insulated spacers.

 

The additional expense can be offset with proper solar orientation, an improved thermal envelope with high R-value insulation in the walls and the roof, and a downsized HVAC system.

20

ARGUMENT FROM SUSTAINABILITY ADVOCATES

The argument from sustainability advocates is that conversion of existing buildings to more sustainable design (to the extent practical) will provide tangible and intangible pay-back in the form of reduced energy costs and increased tenant satisfaction given improved working space and potentially lower costs of occupancy. It is also argued that these green investments can lead to lower vacancy rates, higher rents, and improved property market value.

21

DISCUSS COST/BENEFIT OF

HVAC UPGRADE?

A common example of this cost-benefit analysis is HVAC. Modern HVAC systems are expensive to install but can produce immediate savings in energy costs for heating and cooling in relation to legacy HVAC systems. The other advantage of an HVAC upgrade is improved thermal comfort for building occupants. This can translate into tenants who are less likely to move, meaning a lower low-term vacancy. A landlord has multiple options for HVAC upgrades — each option comes with a different capital cost and expected annual reduction in operation expenses.

22

MODERN BUILDING DESIGN

Modern buildings are designed to offer flexibility to improve their usability and enhance their appeal to tenants. New steel framing technologies eliminate the requirement for interior steel columns while concrete framing technology continues to improve leading to fewer interior columns and more versatile building shapes. The result is the ability to provide more flexibility to occupants in interior office or store design adaptive re-uses.

23

Estimated Savings from Energy Efficiency Upgardes?

The BC Ministry of Energy, Mines, and Petroleum Resources claims that energy efficiency upgrades can reduce annual energy costs for commercial real estate by an average of 20%.  The Ministry estimates that about 70% of the projected costs savings will be associated with energy costs related to heating, cooling, and lighting. These systems present the largest opportun­ities for energy reduction and cost savings for building owners and tenants

24

Examples of Sustainability Retrofits

Sustainable building retrofits may include some or all of the following systems and design features to improve energy efficiency:

 

Re-lamping lighting with energy efficient T-8 and LED lights

Task ambient lighting with smart switches (motion detector sensors) to automatically turn lights on and off

 Direct digital controls for optimal management of all building systems

Low emissivity glazing and/or interior-exterior solar shading

Under-floor ducting and ventilation systems

Daylighting or open design with removal of interior partition walls

 

Use of high efficiency fan motors and heat pumps

25

Discuss the Example of 
Heritage Properties

Heritage properties are good examples where government and industry can work together to achieve economic and social sustainability goals.

 

A number of Canadian cities with heritage programs, such as Victoria, Vancouver, and Ottawa, offer property tax exemptions and relaxed building code requirements for projects which protect the heritage character of historic buildings.

 

These incentives can help encourage the private sector to incorporate sustainability design features into the buildings such as energy efficient glazing, lighting, heating, and recycled and other environmentally friendly materials.

26

_____ is primarily aimed at new construction, while the _____ program is targeted at new and existing commercial construction.

LEED is primarily aimed at new construction, while the BOMA program is targeted at new and existing commercial construction.

27

LEED Stands for?

Leadership in Energy and Environmental Design (LEED)

28

NOTE ONLY

 

Leadership in Energy and Environmental Design (LEED) is a consen­sus-based building rating system first adopted by the US Green Building Council (USGBC) in 1998. LEED assesses the sustainability of building projects, ranging from a conventional market building to a so-called "living building" as the most desirable long-term sustainable outcome.

 

LEED methodology encourages systems-wide thinking in building design and development. The goal is improved environmental sustainability, but also enhanced community goals and better financial feasibility. LEED is now widely recognized as the industry standard in North America, serving as a checklist for building green.

NOTE ONLY

 

Leadership in Energy and Environmental Design (LEED) is a consen­sus-based building rating system first adopted by the US Green Building Council (USGBC) in 1998. LEED assesses the sustainability of building projects, ranging from a conventional market building to a so-called "living building" as the most desirable long-term sustainable outcome.

 

LEED methodology encourages systems-wide thinking in building design and development. The goal is improved environmental sustainability, but also enhanced community goals and better financial feasibility. LEED is now widely recognized as the industry standard in North America, serving as a checklist for building green.

29

Under the LEED rating system, certain performance pre-requisites must be achieved to ensure certification. There are five main categories in the LEED rating system, plus a sixth category for additional design measures:

Under the LEED rating system, certain performance pre-requisites must be achieved to ensure certification. There are five main categories in the LEED rating system, plus a sixth category for additional design measures:

·    Sustainable Sites

·    Water Efficiency

·    Energy and Atmosphere

·    Materials and Resources

·    Indoor Environmental Quality

·    Innovation and Design Process

30

BOMA VS LEED

The BOMA program is easier to apply and less expensive than LEED, so it may have broader long-term accept­ance for private sector commercial buildings.