Can’t Find Hidden Draughts? Try The ‘Candle Test’
Which is why draughts are best avoided if at all possible. Little cracks in your windows, walls, and pipes can create unwanted airflows, potentially raising your bills.
Article source: https://www.huffingtonpost.co.uk/entry/candle-test-draughts_uk_696df65be4b02f48956cba5c