Smart Home Energy 
If you've got a period door with an old-fashioned keyhole that lets cold air whistle through, this brass cover blocks the draught for under a fiver — no tools needed if you use adhesive, and renters can take it with them.
Problem it solves
Blocks draughts coming through old-fashioned keyholes in external doors, reducing heat loss and cold spots near the door.
Who it's for
Renters or homeowners with period doors that have traditional keyholes, especially those noticing draughts or cold air coming through the keyway.
Why we recommend
An easy win for reducing heat loss.
Savings
- Typical annual saving
- Not estimated — draught exclusion savings vary widely by home and baseline draughtiness
- Payback period
- Under 1 year for typical single-door application
