I have these on almost every radiator. The good: You can program individual times and temperatures for each room (7 settings per day. Great). Easy to program. Easy to fit where there has been a trv before. The not so good: Noisy rattly motor. Quite intrusive especially in a quiet bedroom. Only the very last bit of travel in the valve actually throttles the flow so temperatures tend to overshoot, especially on older non finned radiators that have a high thermal capacity and take longer to cool. Would be better if the user could adjust the range as I find that at around 20-30% of full travel the radiator flow is at full rate and the valve is trying to control the temperature at openings above this but with no effect. However I have improved their operation in some cases. By placing a penny inside the bit that screws on to the valve you can reduce the operating range of 4.2mm by around 1.3-1.6mm which improves control. Curring a similar sized circle from an old credit card will do the same but 0.75mm. Hold it in place with a suitable sized rubber 'o' ring. If you get an 'F' error code in insert mode, use a thinner shim or even none at all. It depends on the type of trv body that was on before.Read full review
Verified purchase: Yes | Condition: New
this was a replacement for a previous Terrier valve, The replacement would not "adapt" to the same valve and i had to swap it to another radiator. All in all it took about an hour of messing about before it worked. I have used these valves for about 8 years now and i still have several originals which all work well. The recent versions all seem to have issues with adapting, the control wheel is doesnt adjust the temperature easily and they dont seem to last very long. When i contacted Pegler about replacement part for mounting hub that goes brittle after time they couldnt affer a solution. Bext time i'm going to use Honeywell!
Verified purchase: Yes | Condition: New
Fitted 2 on the radiators in our bedroom we can now control the temperature just how we want it not how the thermostat in the hall thinks it should be. Easy to fit and program.
Verified purchase: Yes | Condition: New
These are great had them for about 12years now so needed a couple of new ones for the expanded system ,great money saver heating in rooms when you want it
Verified purchase: Yes | Condition: New
Good product have purchased the same before, these two are slightly noisier than earlier one but still good.
Verified purchase: Yes | Condition: New
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