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Shifting from Standard to Sustainable

Shifting from Standard to Sustainable.

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Shifting from Standard to Sustainable

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  1. Shifting from Standard to Sustainable

  2. “The traditional approach, where the Architect designs the building shape, orientation and envelope and then transmits the drawings to the mechanical and electrical engineers for their design, is a sequential approach that misses the rich opportunities for optimizing building performance through a collaborative approach throughout the design process…..  Numerous studies of unsuccessful projects can trace the project failure back to a lack of communication between the architect and the engineer; between the mechanical engineer and the electrical engineer; and between the engineer and the contractor.” • *ASHRAE President, Lynn G. Bellenger, “Modeling A Sustainable World, ASHRAE Journal, August 2010.

  3. Performance vs. Prescriptive E-Star and ASHRAE 90.1

  4. Types of Audits • Vendor Audit • Energy Analysis and Brief Survey • ASHRAE Level I – Saves approximately 5-10% • ASHRAE Level II – Saves approximately 15-20% • ASHRAE Level III – Saves approximately 30-60% • *CleanEdison, MFBA Course Content Information, October 2010

  5. Typical Energy Uses in a Building **CleanEdison, MFBA Course Content Information, October 2010

  6. Lighting Improvements • Energy efficient lighting projects generate an average 45% return of investment with a 2.2 year payback. • Using light colored paint or reflective materials on interior or exterior surfaces can reduce light demand loads. • *Energy Cost Savings Council

  7. Multifamily Building Energy Uses • #1 cost is HVAC in mixed or cold climates. • #2 cost is domestic hot water. • *CleanEdison, MFBA Course Content Information, October 2010

  8. Individual Metering in Existing Multifamily Dwellings • 15% Savings: Water • 21% Savings: Indoor Energy • *www.allianceforwaterefficiency.org

  9. Water Savings Measures • Tamper proof aerators on all faucets • Low flow shower heads without aerators • High efficiency washers in multifamily buildings • *Clean Edison, MFBA Course Content, October 2010

  10. HVAC • Install Variable Air Volume (VAV) motors on large Air Handling Units • Install modulating boiler systems with boiler feed tanks and fully modulating burners • Add chilled water and condenser setpoints to control fan operation • Install economizers (air-side or water-side) • Install cooling tower controls • Conduct duct leakage testing (ducts can be sealed from the inside) • Install programmable thermostats • If installing a new system; ensure proper sizing. • *Clean Edison, MFBA Course Content, October 2010

  11. Improving Ventilation • Use exhaust air to condition make up air by installing Energy Recovery Ventilators (ERVs) or Heat Recovery Ventilators (HRVs) • Recovery ventilation can recover 50-70% of heat in winter exhaust • ERVs can recover up to 70% of energy in summer • HRVs can recover up to 40-50% of energy in summer • *CleanEdison, MFBA Course Content Information, October 2010 • *Clean Edison, MFBA Course Content, October 2010

  12. Envelope Analysis • Air Barrier Continuity • Failure of Air Barrier • Air Leakage Dynamics • Finding and Fixing Air Leakage • *CleanEdison, MFBA Course Content Information, October 2010

  13. Methodology - Envelope Improvements • Seal Top of Building • Seal Bottom of Building • Seal Vertical Shafts • Seal Outside Walls • Compartmentalize Interior Spaces • *CleanEdison, MFBA Course Content Information, October 2010

  14. Operations and Maintenance • Detailed Maintenance Schedules for all major building systems should be provided at the conclusion of construction. • Video-taped training should be administered to building maintenance staff by the appropriate vendors. • Monitor energy and water usage to the greatest extent possible based on the building metering system and make corrections as necessary. • *CleanEdison, MFBA Course Content Information, October 2010

  15. Losses in Efficiency Due to Lack of Maintenance • Dirt and dust collecting on light fixtures can decrease efficiency by 15% per annum. • Domestic Hot Water re-circulating pumps not operating properly can result in significant losses. • Incorrect refrigerant charge and leakage can cause significant losses in efficiency (over 30%). • Dirty filters and coils in the HVAC system can cause a 10% decrease in efficiency. • *CleanEdison, MFBA Course Content Information, October 2010

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