As promised, here are two pictures of our Windkat with extension.
We were really desperate to sort out our new fireplace. We had paid a lot of money and it did not work properly. It smelt in our living room of cold smoke and the draw was so bad that we couldn't light a fire anymore.
This is finally now in the past, thanks to your help and your product.
Thank you for your competent advice on the phone and your excellent service. We will be recommending this product to all our friends and family.