I had 2 Daicon aircons and a Sanden heat pump installed. The house is now warmer than ever in winter and our electricity bill has halved, even with installing the Sanden to replace our gas instantaneous how water. Plus no more gas bills. The system is going to pay for itself in utility savings in around 3-4 years. Also installed the Methvan shower head and it is the best of its type. \nThe team were very knowledgeable, passionate about reducing power use and helpful. The after sales service was pretty impressive too.