Bought one of your chimney umbrellas at Grand Designs 2014, this made a significant difference to the amount of rubble and draft I was experiencing in my front room (where original fire hearth had been replaced with a gas installation); however, our Victoria flue system is quite convoluted and the model I got wasn’t blocking everything. Saw you again at Grand Designs 2015 and got the new larger version of the chimney umbrella, I’m delighted to say that not only can this be positioned far lower in the chimney shaft it hasn’t let a single piece of debris come through since I installed it a week ago and their is no draught at all. Money well spent.
