Drayton Digistat +3 Room Thermostat
This thermostat is the best I've found. It doesn't show off with a big screen and LED lights, it just does it's job excellently. In my house it routinely controls to exactly the set temperature. If set to 20.0, it controls to 20.0. Not 19.9 or 20.1.
Some reviews have complained about "excessive" switching, but this is exactly how it achieves such precise control. It switches on and off again once every 15 minutes (on for a variable amount of time each time, depending how far from the desired temperature you are). This control method is called PID (google it) and is used universally used in industry for all kinds of control applications. There is nothing better.
One review mentions that the temperature reads wrongly in his house. I haven't had this problem, but the manual will tell you how to apply a temperature offset if this problem affects you.
The min max set points can be limited (great to avoid kids / non-gas-bill payers ramping up the gas bill), and if necessary the whole control can be locked to avoid any tampering at all.
29 Oct 2014
Spot on for saving energy
I bought this as an add on for my central heating and fitted it within minutes, two wire operation from boiler to the unit so bear in mind it's not wireless, however I was only going through the wall to living room, very easy to fit and does not look out of place next to light switch. You won't go wrong for price and it will save money on your heating, so it will pay for itself in 12 months.
5 Dec 2013
A better designed product than the former unit although not quite a straight swop, the terminal connections are different. The unit controls more accurately being able to control to 0.5 degree C rather than a full degree C.
22 Nov 2013
This was fitted by plumber along with a new boiler. Like many electronic products the instructions and design are overly complicated . However my main problem is that the programme 'froze' on occasions meaning that the boiler stayed on and the temperature kept going up. We only spotted this when we woke in the middle of the night. None of the buttons would work, the display was frozen and the only thing to do was to remove the batteries. As soon as I put the same batteries back it worked normally.
This happened on a couple of occasions. I contacted Drayton who said that it seemed that there was a problem with the chip and sent me a replacement. It is now doing this again so I will replace it with a non-Drayton thermostat.
An earlier reviewer (SBEDIYer) seems to have had the same problem but interpreted it as failing batteries. I suspect he had the same problem as me. The impression I got from Drayton Customer Service (who were very helpful) is that this is a common problem.
1 Apr 2013