Smart Home Energy 
If you've got an unused chimney that's haemorrhaging heat, a Chimney Balloon inflates to seal the flue in seconds — no tools, no mess, and you can deflate it if you ever want to use the fireplace again.
Problem it solves
Prevents heat loss and cold draughts through unused chimneys by creating an inflatable seal that blocks airflow up the flue.
Who it's for
Anyone with an unused open fireplace or chimney who wants to stop draughts and heat loss without blocking the chimney permanently — renters, homeowners, or anyone in older properties with working but unused fireplaces.
Why we recommend
Good price - but not as environmentally friendly as the sheep wool versions.
Savings
- Typical annual saving
- £40–£90/year depending on chimney size and how much heat was escaping
- Payback period
- 3–6 months
