The following diagram shows the many sources of draughts commonly found in Australian homes. Increase your comfort and save money on your energy bills by sealing as many as you can. Payback on investment is quick - quicker if you can put a price on comfort.
Draught Source Solutions
2. Ecoseal door/window seal
3. Chimney Sheep draught excluder
4. Underfloor insulation
5. Caulk (Silicon sealant)
6. Caulk (Silicon sealant)
7. Caulk (Silicon sealant) or Polyfilla or Vent Cover
8. New self sealing exhaust fan or a DraftStoppa
9. Remove downlights and fill holes OR
cover with a Loft Mitt
10. Clear or Opaque Perspex
11. Caulk (Silicon sealant)
12. AcDraftshield for Wall (Box) Aircon
13. Caulk (Silicon sealant) or expandable foam
Many of the above solutions are low cost. Even if you had all of the draughts sources above in your home, fixing them will have fast payback compared to most other energy saving tasks and your comfort increase will be instant.