2. Energy Efficient Building Design & Indoor Air Quality

4. Principles of Energy Efficient House Design Insulation Windows Draughtproofing Orientation Zoning Thermal Mass Cross Ventilation Landscaping Efficient heating system Efficient hot water system Efficient lighting and appliances

5. Air Leakage Factors which determine rate of air leakage are: –Temperature difference in and out. –Wind/Exposure –Exhaust Fans –Combustion appliances – wood heaters –Type and Style of building Weatherboard leaker than brick veneer on concrete slab Two storey leaker than single storey Atriums

6. Why Ventilate? To assist in cooling a space Occupant Health –to improve indoor air quality (refresh space) –to control excess humidity

7. Minimising Resistance to Ventilation

8. Ventilation - Exhaust Only Fan, Bath Fan or Range Hood

9. Ventilation - Supply Only

10. Ventilation - Balanced System with Heat/Energy Recovery

11. Main Sources of Pollution Inside a House Mould and spores Mites and their debris Dust Cooking and grease smoke emissions Pet dander and debris Smoke from fireplaces and wood-burning stoves Occupant skin dander Viruses and bacteria Fumes from various chemical and cleaning products Cigarette smoke

12. Main Sources of Humidity Inside a House Activity (family of 4)Litres/Week Cooking (3 meals a day for 1 wk)6.3 Dishwashing (3 times/day for 1 wk3.2 Bathing (showers & baths)2.4 Washing (per wk)1.8 Drying clothes indoors or use of external vent (per wk) 10.0 Floor cleaning (30.5 2 )1.3 Occupants normal breathing & respiration 38.0 Total Volume of humidity per week 63.0 litres

13. Residential Air Leakage Rates Older homes as much as 3.0 achnat Average home in Victoria – 1.49 air changes per hour natural (achnat) (SEAV 1991) Below 1.0 achnat moving toward energy efficiency. Highly energy efficient home – 0.5 to 0.25 achnat. North American code (ASHRAE) 0.35 achnat

14. Blower Door - Air Leakage Testing Unit

15. JG King Homes Miner’s Rest 6 Star Plus Display House Blower Door Pressure-testing conducted by Air Barrier Technologies (23 January 2008) Result – 0.22 air changes per hour natural Tightest Australian residential building tested to date.

16. New UK Building Regulations introduced April 2006 (to meet Climate Change targets) “Build Tight – Ventilate Right”

17. Indoor Air Quality Issues to deal with as homes become ‘tighter’  Poor air quality – stuffiness, odours, increase in dustmite, mould.  Poor combustion in gas appliances, wood heaters  Poor performance from exhaust systems

18. Venmar Whole-Home Heat Recovery Ventilation & Air Filtration System Complements Highly Energy Efficient Buildings Reduces building air leakage through a balanced supply and exhaust of air. Transfer of up to 80% of heat energy Protect occupant health (maintain good indoor air quality) Heat-Shifting capability

20. Venmar Heat Recovery Ventilator

22. Useful Websites –www.sustainability.vic.gov.auwww.sustainability.vic.gov.au –www.buildingcommission.com.auwww.buildingcommission.com.au –www.greenhouse.gov.au/energyefficiency/buildi ng/code.htmlwww.greenhouse.gov.au/energyefficiency/buildi ng/code.html –www.fwprdc.org.au (5 Star rating for timber-floored dwellings)www.fwprdc.org.au –www.gbcaus.com (Commercial GreenStar Rating)www.gbcaus.com –www.healthyhouse.com (Healthy Building consultants)www.healthyhouse.com –www.air2energy.com.au (HRV/ERV technology)www.air2energy.com.au –www.forbo.com.au (non-toxic floor covering)www.forbo.com.au –www.hotbeam.com.au (LED lighting)www.hotbeam.com.au –www.anrofloorcare.com.au (non-toxic paints/finishes)www.anrofloorcare.com.au

23. Venmar Heat Recovery Ventilator Provides ‘fresh air’ to all areas of your home Removes pollutants & moisture from kitchen, bathrooms and laundry filters incoming air Shift temperature around building Overcomes negative pressure problems Recovers Energy (up to 80%)Recovers Energy (up to 80%)

24. Why utilise Heat/Energy Recovery Ventilation manage indoor air quality 5 Star Energy Efficient Home To maintain energy efficiency of building envelope Heavy weather sites – coastal, elevated. Inner city locations – noise, security, outdoor air pollution