Smart Home Energy 
If you've got draughty windows and don't want to replace the glass, thick blackout curtains add a cheap thermal barrier — especially useful for renters with single-glazing who can't upgrade the windows themselves.
Problem it solves
Reduces heat loss through windows in winter and heat gain in summer by adding a thermal barrier, cutting heating and cooling costs.
Who it's for
Renters and homeowners who want to reduce energy bills without structural work, particularly those with single-glazed windows, draughty rooms, or homes that lose heat quickly in winter.
Why we recommend
Good thick curtains are a sure way to reduce heat loss.
Savings
- Typical annual saving
- £20–£60/year depending on window size, room usage, and how draughty the existing windows are
- Payback period
- Less than 1 year
