Smart Home Energy 
If you've got cold air whistling under your doors, this brush seal is an £8 fix you can fit in ten minutes — no special tools, no landlord permission, and it'll pay for itself in weeks.
Problem it solves
Reduces heat loss and cold draughts through gaps under doors by sealing gaps up to 25mm, cutting heating costs.
Who it's for
Renters or homeowners with draughty doors who want a cheap, removable fix to stop cold air coming under internal or external doors.
Why we recommend
One of the first things you can do to save energy is block up gaps in leaky doors - it's simple and pays for itself in weeks!
Savings
- Typical annual saving
- £20–£50/year depending on number of draughty doors sealed and heating usage
- Payback period
- Less than 1 year
