Close suitable shutters on cold nights
Why this can help
Suitable shutters or curtains can reduce heat loss through windows at night. Environmental guidance supports using existing protections appropriately.
One possible next step
At dusk on a cold day, close suitable existing shutters without blocking vents or heat emitters.
What changes the outcome
Keep ventilation and radiators unobstructed, and reopen for useful daylight or solar warmth. A percentage reduction at the window is not the same percentage for the whole home.
The action
One possibility
Leaving the window unprotected after dusk
Another possibility
Closing existing shutters for the cold night
Suitable shutters or curtains can reduce heat loss through windows at night. Environmental guidance supports using existing protections appropriately.
At dusk on a cold day, close suitable existing shutters without blocking vents or heat emitters.
Sources and calculation references
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