Published 15 April 2014
This case study is for a 10-storey building with 75 residential units, 15 commercial units and 3 underground car park levels.
Our energy audit identified cost effective energy saving opportunities that could achieve the following:
- Reduction in energy consumption by 36%.
- Payback time on the investment of 2.6 years.
- Carbon emissions reduction potential of 318 tonnes per year.
Fluorescent lighting in the service areas and car park levels accounted for 30% of the total electricity usage on-site. Most of these areas were unnecessarily illuminated 24/7.
The residential corridors were lit 24/7 by circular fluorescent tubes, which accounted for 10% of the total electricity usage.
The entry lobby, lifts and commercial access areas were lit 24/7 by halogen downlights.
Several energy-saving lighting upgrades were identified:
- Install occupancy sensors to switch off lighting in unoccupied areas.
- Replace fluorescent tubes with LED tubes.
- Replace circular fluorescent tubes with LED oyster lights.
- Replace halogen downlights with LED downlights.
We were surprised to learn that our lighting wasn’t very energy efficient, as we’re quite a new building. However, we’re very excited about the savings and will be recommending these changes to the Executive Committee. The energy savings are higher than expected…we should have done this sooner.
– Craig, Building Manager
Published 12 September 2013
Have you received a high gas bill recently? Can’t figure out what’s causing it?
This post will help you understand how to read your gas bill and gas meter, which may help you take control of your gas usage.
Understanding your Gas Bills
If your gas bill is a bit confusing, look for a section that looks similar to the one in the box below. It should contain the following information:
- average daily gas usage in megajoules (MJ)
- average daily cost
- average daily usage compared to the same time last year
- a graph showing your usage trend
Ever wondered how much that old fridge in the garage costs to run? How often is it used anyway?
You might be surprised to know that old fridges and upright freezers are some of the biggest energy users in the home costing up to around $300 a year to run. Cost aside, an old fridge contributes about 1 tone of carbon pollution to the atmosphere every year. Perhaps it’s time to ask yourself if you really need that second fridge.
Published 4 July 2013
Thermal imaging is an effective way to identify the sources of heat loss within your home or business. You can use a thermal imaging camera to:
- See air leaks around windows and doors
- Check the effectiveness of your weather stripping and draft stopping measures
- Discover if insulation is missing, defective or even present
- Check duct work for leaks
Most offices have at least one water cooler and many of these have both a ‘chilled water’ and ‘boiling water’ function. So how much energy do they actually use?
The actual energy consumption of your water cooler will depend on how it is used, and how many people are using it. The only way to know the actual energy consumption of your water cooler is with a plug in power meter. Here are our test results…
We keep seeing the Arlec Energy Cost Meter at Bunnings, Coles and other shops. It costs about the same as our power meter, so we thought we’d give it a comparative review.
The power consumption of an appliance in watts is often said to be equal to current multiplied by voltage.
Unfortunately, it’s not that simple. This conventional wisdom or ‘rule of thumb’ will have you calculating Apparent Power rather than Real Power (what you get billed for).
Published 4 April 2013
The power consumption of domestic fridges is typically between 100 and 200 watts. Over a full day they are likely to use around 1-2 kilowatt-hours (kWh).
The actual energy consumption of your fridge or freezer will depend on many factors. These include:
Communities and individuals across Australia are taking electricity generation into their own hands and choosing clean renewable energy.
Australians are becoming increasingly aware of the polluting effects of coal- and gas-fired electricity generation. Together with ever-increasing utility bills, more and more people are looking for alternative sources of energy. Waiting for government and the energy industry to transition to renewable sources is proving too long for some households.