Ordered a Reina Mini thermostatic radiator element from H&P along with a rad. It worked when installed, I turned it off as its not been needed. Then a month or so later it wouldn't start. H&P asked for a video which I sent. They said the manufacturer wanted to know how it was installed and commissioned. I said by qualified professionals. They said the manufacturer needed to know details as if not commissioned correctly the unit would fail. Reina wouldn't send instructions for me to check with installers. Too much hassle to get both plumber and electrician to contact Reina. So I gave up. Binned the Reina and bought another unit elsewhere. Reina proved to be dodgy. H&P took no responsibility. Avoid.