Afterglow

Initial installation and follow up for a refit of a water based heat exchanger and set of radiators was acceptable although installed months late. A few minor problems were corrected on 6 month follow up. However, we have had a serious knocking in one radiator since installation a year ago and this has not been corrected. Worse, Afterglow has made no attempt to correct. They were scheduled in December to come end of December. They called and rescheduled. They were a no show on the reschedule. They have not responded to email attempts since. The rad has to sit wide open to avoid the knocking thus wasting energy costs.
The comment below that the problem has been corrected is premature. There are still issues with the system.
Update as of 1 June 2016.
Afterglow was able to correct the knocking by reversing the input and output on the rad (they were hooked up wrong initially). They also corrected another problem caused by a backflow valve failure, so that we were getting cold water drawn into our hot water outflow.
I am pleased that Afterglow was persistent in working to solve the problem and realize that our heating system (Jaga hot water radiators running through a heat exchanger off our hot water tank) would take time to get the bugs out. We have a state of the art system at this point.