Last year at Stithians show you advised us to go for air-source or ground-source heating, which after lots of debate we have had installed. We are delighted- thank you for pointing us in this direction. I just want to tell you that your staff are a credit to you and Mark, we are so impressed with the “can do” attitude of your engineers; Dec, Lee, Tom and Zac and of course Chris who advised on the system and pulled it all altogether. Nothing was too much trouble and all the challenges were met with a “Problems are there to be solved not moaned about!” Also impressed with the depth of knowledge and the patience in explaining the workings of the system by all the staff. Chris was so very helpful and his skill and knowledge of the system is exceptional.