Replaced a broken Brivis (10 years old) with a smaller TQ516 in Feb 2020. At first I was a little concerned it’s too small but Coldflow assured me it’s sufficient for my house. The heater has been running very well and warm up the house reasonably quickly. I still need to find ways to verify if it’s as energy efficient as it claimed. So far my gas bill seemed to be “a bit lower than last year” same period.

The MagicQTouch controller is easy to use and easy to program. Only drawback is that you can only have 4 different settings in a day. Brivis allows you to have more, e.g. (1) turn on at 6am, (2) turn off at 10am, (3) turn on at 4pm, (4) lower the temperature at 10pm, (5) turn it off at 12am.