There are a variety of opportunities available at building facilities for the implementation of energy efficiency projects.

Some of the potential areas of energy efficiency measures include:

Air-Conditioning Systems

• Choose high-efficiency water-cooled package units / chillers over air-cooled ones during replacement, for higher energy efficiency performance
  • For example, assuming that an air-conditioning system produces an average of 200 tons of chilled water a day and the electricity tariff is $0.2262/kWh, a water-cooled air-conditioning system will save you $20,000 of electricity costs monthly as compared to an air-cooled one.

• Control chiller plant operation by sensing the actual cooling load demand
• Use high-efficiency motors for pumps, fans & compressors
  • Captures about 10% of the energy saving potential
• Select chillers, pumps, fans, motors of the appropriate size to match load requirements
• Install variable speed drive for motors of chilled water pumps, condenser water pumps, cooling tower fans & AHU fans to match the speed and the torque to the load requirements
• Optimize outside air intake to satisfy comfort, health, and code requirements
• Do not overcool.  Maintain indoor room temperature between 23-25°C, as high as occupants feel comfortable
  • Every 1°C increase can save about 3% of electricity cost on air-conditioning system
• Use good quality thermostat/sensors and locate to reflect true space temperature

Ventilation Systems

• Use natural ventilation where possible
• Size fans correctly and select high-efficiency motors
• Install occupancy sensors

Hot Water System

• Choose heat pumps over boilers for hot water productions
• Use solar water heaters as standalone systems or as boosters for existing hot water systems
• Keep storage temperatures to a minimum and install a timer to turn storage hot water systems off after hours
• Size unit to match the requirements of the hot water demand

Lightings

• Eliminate excessive lightings by reducing the total lamp wattage in each activity area
• Use energy efficient lamps such as T5 fluorescent lamps with electronic ballasts and compact fluorescent lamps (CFLs)
• Use motion sensors for lighting and ventilation fans in common areas (e.g. common toilets, corridors, stairwells)
• Install timers and dimmers for office lightings
• Make use of natural light where possible

Office Equipment

• Turn equipment off when it's not being used and at the end of the day
• Make energy efficiency a criteria when purchasing new equipment