Singapore Environment CouncilCity Developments Limited

Saving Energy

Aim: To reduce greenhouse gas emissions.

Everyone around the world, in every aspect of our daily lives, needs to reduce the amount of energy we consume so as to cut down on associated pollution and conserve the world’s natural resources and habitats. Using electricity translates to an increase in carbon dioxide emissions from the burning of fossil fuels, and carbon dioxide is a major contributor to climate change. Global warming can lead to storms, rising sea levels and unpredictable weather patterns.

Offices contribute to this problem. We use electricity to power our office equipment like computers and copiers, lighting and air conditioning.

Lighting accounts for 30-50% of energy used in most buildings and air-conditioning for over 40%. By conserving energy in the office, you will help reduce greenhouse gas emissions and save money on electricity bills in the process.


  • Switch off all lights, computers, copiers and other non-essential equipment when not in use including after office hours at night and during weekends. This can reduce their energy use by 25%.
  • Enable energy-saving features on all computers and copiers.
  • Put computer monitors to sleep rather than use screen savers.
  • Turn off monitors when not using for periods of more than 30 minutes.
  • Turn off personal computers if not in use for 2 hours or more. Don't worry this will not harm your machine.
  • A LCD monitor will cut down 70% of energy use compared to a CRT monitor.
  • Make good use of natural lighting when possible.
  • Install occupancy sensors that turn off lights when no one is in the room.
  • Make sure external doors and windows are closed and do not allow the cool air to escape from your office.
  • Lights and machines give off heat, so turn them off when not needed to reduce your building's cooling requirements.
  • Regular maintenance and annual servicing of your air conditioning system can ensure maximum energy efficiency and performance.
  • Consider energy-efficiency when purchasing new equipment. Give preference to equipment with low power stand-by or sleep features.
  • Printers spend a lot of their time "idling" and this consumes energy, so compare energy consumption of different makes.
  • Reduce standby energy by using one multipurpose machine for photocopying and printing or share printers and copiers, this will decrease their idle time and provide for more cost effective use of the equipment.