An outlier or a sign of things to come? Deals have dried up as a result of the crisis, but now a number are starting to close. Dublin-based company Smoke and Fire Extract has sold its Thor Duct fire safety product to Swedish ventilation equipment supplier Lindab, the buyer has disclosed to the stock exchange. Thor Duct is a suite of fire-rated ductwork used in large buildings to manage air flows in the event of a fire, or to ventilate professional kitchens safely. It was developed by Smoke and Fire Extract Ltd, which licensed the design and specifications to installers…