Draught excluder
A draught excluder is used to eliminate cold draught and slow heat loss.

Types
Door
A door draught excluder is placed at the bottom of a door to cover the gap located at the threshold.[1][2]
Tubular sand-filled fabric draught excluders are commonly referred to as "door snakes" in Australia.[3][4] Jenny Agutter told The Guardian that the hotel in the Outback where they stayed while making Walkabout used them to keep venomous snakes out of the guests' rooms.[5]
Letter box
Letter box covers usually take the form of a brush-like cover fitted to the inside of the door. Other types include spring-loaded flaps also fitted to the inside.
Key hole
Key holes can be draught proofed with a simple proprietary key hole cover that is fitted to the inside of the door.
Chimneys
Unused or infrequently used chimney flues can be draught proofed with balloon or fabric type excluders that are fitted in the lower section of the flue.
References
- Griffiths, Sally Cameron (5 January 2010). "How to make a draught excluder". The Guardian. London. Retrieved 8 April 2012.
- Clark Howard, Brian. "20 Adorable DIY Draft Snakes Fight Chills". The Daily Green (blog). Good Housekeeping. Retrieved 8 April 2012.
- "Make It Yourself—Door Snake". ABC Television. Retrieved 8 April 2012.
- "Donate a door snake". University of Tasmania. 15 March 2012. Archived from the original on 31 October 2014. Retrieved 8 April 2012.
- "How We Made Walkabout". The Guardian. London.