Research has shown that the greatest energy loss is caused by infiltration (leaks in a building). Studies have shown that infiltration can lose 20% to 60 % of the heating and cooling energy. Infiltration is an invisible attribute which can sometimes be felt by draughts.
Infiltration is also an important factor in maintaining a healthy house. It is the required air flow when all doors and windows are closed to allow occupants fresh circulating air. A compromise has to be reached in the sealing process, considering both energy efficiency and the health of the occupants within the building.
Energy and indoor air quality have to work together, and not in isolation. Reducing energy use is an important function but so is your health. There are international codes that stipulate the required air movement in buildings apart from the required window and door ventilations. Air flow should be maintained even though the doors and windows are closed or the house unoccupied.
Factors that can reduce energy use for thermal performance :
• colour of roof and covering
• colour of walls
• glazing and shading
• infiltration (leaks in buildings)
• air conditioning duct leaks
Our services cover:
• measuring infiltration and providing recommendations for optimum results
• addressing air conditioning duct leaks contributing to wasted energy and poor indoor air quality
• advising on glazing options
• general advice on energy saving in the building
• detection of sub-standard insulation
• advice on new projects for energy efficiency
• advice and installation of energy recovery ventilators, circulating fresh air within the building and reducing energy costs for heating and cooling
• checking appliances for energy consumption
Our services include the following levels:
• general visual walk through, advising potential areas for improvement
• advise on improvements
• general walk through noting potential areas for improvement on a visual basis
• use of diagnostic tools to analyse the building envelope for potential areas of energy loss
• create a list of all electrical appliances, measure the consumption of each unit and compare to the manufacturers label
• advise on improvements
Our diagnostic equipment involves:
• using fan pressurisation methods to check and report for air leaks
• checking the ceiling for energy loss due to ineffective ceiling insulation
• checking walls for energy loss due to ineffective insulation or thermal bridges
The water heater uses the most energy, followed by heating and cooling and the remaining through electrical appliances.
The star rating of appliances provides a bench mark to guide purchases, choosing the best star rating within budget. The introduction of the smart meter also allows householders to choose the time they use power in order to capitalise on reduced off peak rates.
When it comes to mechanical heating and cooling to satisfy thermal comfort, the opportunity for reduced energy rates is limited. High demand for heating and cooling occurs during the early mornings and late afternoon coinciding with peak energy times.