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Below is a quick bullet point guide on issues you should consider if you want a green development that uses sustainable
construction principles. Contact Trade Services if you require any further info.
Choose A Sustainable Site
By making smart decisions about your building site early on, you can have a dramatic impact on the costs and savings of
your project over the long term.
Location
Redevelop a brownfield, locate your project in an existing structure or use an in-fill strategy to help limit sprawl and
preserve natural land. While there may be extra cleanup and insurance costs associated with building on a contaminated
brownfield, many programs now exist to help defray those costs. In addition, redeveloped brownfield sites that are
centrally located and offer river views, for example, are available at rates that are significantly below market level
and can surge in value once remediated.
Orientation and Shape
Orient your building to minimize or maximize solar heat gain, according to your heating and cooling needs.
Design the shape of your building to optimize daylighting and reduce your electric lighting costs. Take care, though, to
minimize any cooling load increases that can result from daylighting.
Use a combination of strategies -- such as high-performance windows and planted roofs -- to control solar heat gain and
loss throughout your envelope.
Landscaping
Landscape your building's grounds or roof with native or adapted trees and plants. This type of greenery absorbs heat,
helping to increase occupant comfort and lower air-conditioning costs by bringing down interior temperatures and
providing shade. Green roofs also provide extra insulation in colder weather.
Stormwater Management
Surround your building with permeable pavement, plantings or soil to allow stormwater to seep into the ground instead of
washing into sewers. These techniques can cost less than traditional culvert drainage strategies and at the same time
reduce pollution runoff. They can also enhance your corporate or institutional image in the eyes of employees, tenants
and the public.
They can also enhance your corporate or institutional image in the eyes of employees, tenants and the public.
Make use of grassy channels, known as bioswales, to reduce and slow the flow of stormwater from your property. Bioswales
can help prevent erosion and filter stormwater, keeping harmful pollution, fertilizer and pesticides out of storm sewers.
For similar stormwater management results in urban areas, use rainwater cisterns, in conjunction with green roofs, which
can also provide a water source for cooling towers and irrigation.
Construct wetlands and retention ponds to improve the look of your grounds, filter polluted stormwater runoff and reduce
the need for storm sewers.
Maximize Water Efficiency
Both inside a workspace and outside a building, there are numerous steps you can take to reduce your use of clean,
drinkable water, an increasingly precious and expensive resource in many areas of the country.
Landscaping
Landscape with plants that are well adapted to the local climate. Choosing indigenous plants over exotic varieties can
help reduce the need for irrigation, as well as environmentally harmful pesticides and fertilizers. Invasive non-native
plants can harm the local ecology.
Choose a micro-irrigation system, instead of traditional sprinklers, to deliver water to your grounds more efficiently.
During watering, micro-irrigation delivers 85 to 90 percent of the moisture supply to plants, compared with just 40 to
50 percent delivery for typical broadcast sprinklers.
Plant low-water ground covers or drought-tolerant grass and use absorbent soil mixtures to promote stormwater
infiltration and reduce additional costs related to managing stormwater.
Water plants and grass with rainwater from an on-site cistern to limit the use of potable water.
Fixtures and Cooling Towers
Specify waterless urinals, low-flow or composting toilets and high-efficiency faucets and dishwashers, which use a lot
less water than conventional technologies.
Install a plumbing system that recycles water at your site. Known as "gray water," this recycled water can be used to
flush toilets, fill a cooling tower or irrigate landscaping.
Choose a closed-loop cooling tower, which can save hundreds of gallons of water per day on average by reducing
evaporation. In addition, investigate whether your area allows the use of non-chemical cooling towers and water
conditioning systems. These use polarization technology or sand filtration combined with ozone for disinfection instead
of chemicals, helping keep polluted discharge out of the sewer system, and lower water consumption by reducing the need
for make-up water.
Save Energy
Energy-efficient design is one of the best opportunities you have for cutting costs and reducing your project's harmful
environmental effects.
Windows and Daylighting
Incorporate daylight design elements such as clerestories, light shelves, skylights and high-performance windows.
Increasing the amount of natural light in your building or workspace will reduce your electricity bill, as well as help
boost employee productivity and satisfaction.
Specify windows with a shading coefficient no higher than 0.4 on the south, east and west and a visible transmittance
level above 0.6 to let sunlight in and keep excessive heat out. If you are building in a region with hot summers and
cold winters, a U-value in the .25 to .35 range will provide adequate insulation against the heat and cold.
Tune your window specifications to your building's orientation. Shading coefficients are most important on southern,
eastern and western exposures, while northern exposures should have high visible transmittance and low U-values.
Electricity Use
Site your building according to its heating and cooling needs. Adjusting a building's orientation by just a few degrees
can have a big impact on the size of your heating and cooling system and your energy bill.
Specify lighting fixtures with a coefficient of utilization of at least 80 percent.
Make sure your fixtures and lamps are properly sized for use with one another. For example, T-5 lamps don't work as well
in direct fixtures designed for T-8 lamps and may be too bright for some direct-lighting strategies.
Install occupancy sensors to control lighting, ventilation, air conditioning and heating in enclosed areas that are
occupied intermittently, including offices.
Instead of using recessed fixtures to light a workspace, use a pendant strategy with an open top so light will hit the
work surface and also reflect off the ceiling and walls into the task area.
Emphasize light-colored surfaces that reflect light and appear brighter.
Hire a lighting designer. A good lighting specialist will provide solutions that cut energy costs while creating a more
pleasant and productive environment.
Speak with Trade Services throughout the project and help ensure you will meet your efficiency goals. Your design should
include equipment to monitor water and energy performance over the entire life of the building.
Implement features such as low-e windows, increased insulation, task/ambient lighting and energy-efficient office
equipment to reduce waste heat, which will allow you to downsize your HVAC system.
Consider staging multiple smaller HVAC chillers, rather than one large chiller. Compressors that run near capacity are
most efficient. Variable speed drives can also help chillers operate more efficiently.
Specify oversized ducts that will deliver air at a lower speed and enable you to reduce the size and electricity
consumption of your fans. An added benefit is a much quieter mechanical system.
Implement automated building controls for your HVAC system.
Office Equipment
Choose photocopiers, fax machines, printers, water coolers and other office equipment that carry the Energy Star label,
an indication that they use an average of 50 percent less energy than standard models.
Ensure that the Energy Star "sleep mode" features are enabled on the equipment.
Make use of laptop computers, which use 50 percent to 90 percent less energy than standard desktop models.
Specify computer monitors with flat screens, which use half as much energy as CRT screens and offer sharper displays and
less reflection.
Make smart use of materials and resources
Using reused and recycled materials as much as possible -- during construction and throughout the life of your building
-- will save you money and time and help conserve natural resources such as wood.
Evaluate and specify materials or assemblies based on life-cycle analysis tools such as eLCie, BEES and Athena.
Create a management plan for construction waste management with the help of a consultant. Some integrated waste
management companies such as Allied Waste offer services that are designed to meet LEED criteria in this area.
Make use of preexisting building shells and other structural elements at your site, when possible.
Set aside used materials such as hardwood flooring, high-quality brick, structural steel, plumbing fixtures and cabinetry
and install them in your new space or elsewhere.
Use materials that were harvested, extracted or recovered in the region.
Limit wood use. For items such as shelving and bookcases, consider using composites made from wheat fiber or other
agricultural waste or other non-wood materials.
Specify certified wood products. Purchase wood or wood products that are certified by the Forest Stewardship Council,
indicating they originate from sustainable, well-managed forests. FSC-certified wood can be more expensive than common
types of wood, but is less expensive than exotic varieties. Growing demand is driving down the price of certified wood.
Safeguard indoor environmental quality
You can help protect the occupants in your building from eye and lung irritation and other health problems by specifying
gas-free materials and furnishings and keeping your space well ventilated.
Materials and Furnishings
Choose materials such as carpets, paints, wall coverings and adhesives carrying the Green Seal label and furnishings with
Greenguard certification -- signifying they emit low levels of potentially harmful volatile organic compounds (VOCs).
Cleaning and Maintenance
Limit the use of harmful cleaning solvents in your space by choosing low-maintenance floorings and furnishings and by
equipping entryways with features such as awnings, mats and walk-off areas.
Minimize the spread of toxic chemicals in your space by centrally locating janitorial facilities and installing a
separate ventilation system and sink for mixing concentrated cleaning agents.
Use cleaning products that come in concentrated form and minimize the use of harmful compounds.
Ventilation
Specify a displacement ventilation system that delivers low-speed fresh air at floor level and allows it to rise in the
room.
Install operable windows, which keep occupants comfortable and more satisfied by allowing them to control their access to
fresh air.
Text courtesy of www.nrdc.org
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