From the moment I received initial contact with your sales engineer,Simon,I found him and what he had to say about the product very convincing. Not in a brash way but in a confident way of knowing what the product would do. Convinced,I went ahead and ordered. The installer arrived within the agreed allotted fitting time and carried out the installation. Again, another charming ,and efficient member of your team. From the moment of installation it ‘did exactly what Simon said it would do. After settling down for 48 hours ,we said ‘goodbye’ to Condensation.That is how it has remained. I therefore wouldn’t hesitate in giving a full recommendation to the product as sold to us by ENVIROVENT. P.S. I only wish I was still in the workplace, as I would relish the opportunity to sell such a product.