I also hoped this would help lower my fuel bills. A friend of the family builder duly fitted for me and i note he has fitted the Wickes TRVs.. I had simply assumed these would work [rather like a room thermostat] by you waiting til the room gets to the desired temp and then moving the dial until it just "clicks" off.
However these bascically have a dial numbered from 1 to 5 [and no discernable noise of them "shutting" now matter if i swung the dial from 1 extreme to the other]. I didnt patiently see if they work by seeing if a radiator got cooler [ie no hot feed in] if i turned the dial down to 1 or * but basically i don tknow how they work! Do i randomly try different numbers in each room until i manage to match a "number" with a comfirtable temp?
Do these valves simply work by restricting the amount of hot water that enters depending on how high a setting is selected [and if no how would that differ from the normal turn-screw valves that were on there?]
I appreciate helping me solve this simple but perplexing matter. Thanks