Thermal downdraught on windows is a fact of life. I understand the mechanics involved, but that doesn't make it any more comfortable!

Short of replacing the glass in my double-glazed units with (yet) more efficient glass, what options do I have for reducing the uncomfortable effect of thermal downdraught?

If it is relevant:

  • my uPvc double glazing is all black (internal and external)
  • All windows have roller blinds, some also have curtains

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