Retrofitting existing properties into tamable, green buildings isn't an easy task, but it is one that can offer substantial payback for your properties. Simply by shifting your focus from obtaining LEED certification first and foremost to obtaining an Energy Star Certification can yield this satisfactory payback. Specific focus on strategies for improving the energy efficiency of the heating ventilating and air conditioning systems in these buildings often represents an investment opportunity with satisfactory payback, since the systems typically account for 40% to 60% of the building's energy use. With that in mind, the following are strategies you can look to first for improving your building's energy efficiency: 1. Upgrade windows. 2. Check insulation. 3. Ventilate properly. 4. Watch infiltration. 5. Examine controls & metering. 6. Understand heating options. 7. Improve air conditioning. 8. Take action.
coming up green IREM® MEMBER SHARES ENERGY- SAVING RETROFITTING OPTIONS THAT r PROVIDE FINANCIAL RETURNS etrofitting existing properties into sus- In the competitive residential rental world, owners and tainable, green buildings isn’t an easy managers who want to be environmentally friendly must be task, but it is one that can offer sub- adept in utilizing technology that incorporates payback that stantial payback for your properties. makes financial sense, as well as providing a positive public Simply by shifting your focus from relations image for your company. obtaining LEED certification first and Everything from installing shower head water restric- foremost to obtaining an Energy Star tors in bathrooms to placing high-efficiency light bulbs Certification can yield this satisfactory in your multifamily properties are easy solutions you can payback. Not only is this goal readily implement quickly. However, specific focus on strate- obtainable, but it is also an important gies for improving the energy efficiency of the heating initial step toward LEED certification. ventilating and air conditioning (HVAC) systems in (See sidebar, page 25, for definition of these buildings often represents an investment opportu- these terms.) nity with satisfactory payback, since the systems typically nov/dec 2008 J P M www.irem.org 23 ® special feature Check Insulation Since there is more exterior wall square footage than roof square footage in high-rises, insulating the walls has a greater impact on energy reduction If a building already has energy- than insulating the roof. This strategy requires gaining access to the exterior efﬁcient windows or the property walls. Since high-rise buildings have cannot afford new ones, make sure the masonry exterior walls, interior access is more feasible. However, interior window seals are maintained. walls also present challenges in that plaster, drywall and final finishes are expensive to restore. account for 40 to 60 percent of the building’s energy use. Increasing the amount of exterior With that in mind, the following are strategies you can wall insulation should be evaluated look to first for improving your building’s energy efficiency. when planning any major renovation, as minimum exterior wall insulation
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