Info about this product on the website looked straight forward but when the product arrived and looking into the instruction booklet for installation, it wasn't straightforward and we had to seek advice to get info on how it should be installed. It's quite fiddly. Took much longer than expected and so costs me more due to time taken with electrician. It is now summer so not really using it. I just hope it will work during the winter time to prevent condensation and mould.