That's a very valid point.
I don't like walking upstairs when the kids used up all the hot water. All nearly left home now though.TitanTim wrote: ↑Thu Oct 07, 2021 9:11 pm I've had Hive since 2015 and generally been pleased with it, for me just gives you that extra flexibility if you're not certain when you will be home so you can control the heating remotely at will instead of having it ticking over on a timer wasting heat.
Tim.
Your radiator valves are just TRVs (thermostatic radiator valves) with a remotely-controlled motor (instead of a temperature sensitive element, wax normally) . The ONLY advantage they give is you don't have to get up and physically adjust them. You could have saved your £800 without them, but you probably wouldn't have thought of it (why would you?).pvr wrote: ↑Thu Oct 07, 2021 9:00 pm Ah, I can understand that with a Hive system which works like that, but with the Honeywell system I control each radiator. So depending on the time of the day, different radiators go on and off. After installing it, it saved about £800 a year by not just having a central thermostat
Never thought of that but yes, that is one advantage
Because if your programmer comes on, your wall thermostat will hold it off if the temperature is too high. And if it doesn't your TRVs will hold your rads off (this is presuming you have it all set correctly).
Surprising as it is impossible to do it manually, you would have to go in every room to switch the radiator off at 6 am to only heat a bedroom, bathroom and kitchen. Then later in the day do the reverse and open up lounge etc and close off bedrooms. Hence the savings I seePondrew wrote: ↑Thu Oct 07, 2021 9:34 pmYour radiator valves are just TRVs (thermostatic radiator valves) with a remotely-controlled motor (instead of a temperature sensitive element, wax normally) . The ONLY advantage they give is you don't have to get up and physically adjust them. You could have saved your £800 without them, but you probably wouldn't have thought of it (why would you?).pvr wrote: ↑Thu Oct 07, 2021 9:00 pm Ah, I can understand that with a Hive system which works like that, but with the Honeywell system I control each radiator. So depending on the time of the day, different radiators go on and off. After installing it, it saved about £800 a year by not just having a central thermostat
I am pretty sure HIVE is a brand name of British Gas. The equipment is supplied by either Honeywell (probably as they are the biggest), or Danfoss, or possibly Schneider, or Siemens.
I have been designing heating and cooling systems for 30 years and have never used the 'app' based technology because I haven't seen any cost saving advantage.
All you have to do in that case is change it before you go out. It takes approx 1-3 hours to heat a house by 5 deg c so you would still need to pre-empt your arrival in any case (and remember).
Your normal TRVs on every radiator (except at least one, usually bathroom or hallway) have temperature sensing elements (hence the name thermostatic radiator valves). The vast majority have a scale of 0-5 (with a snowflake between 0 and 1). Zero is off, snowflake is approx 5 deg c, 1 is approx 18 deg c and 5 is approximately 27 deg C, the rest are increments of these.pvr wrote: ↑Thu Oct 07, 2021 9:47 pm Surprising as it is impossible to do it manually, you would have to go in every room to switch the radiator off at 6 am to only heat a bedroom, bathroom and kitchen. Then later in the day do the reverse and open up lounge etc and close off bedrooms. Hence the savings I see
You'll have to be quiet then, cos she's always listening
That is the exact issue, you do need to touch them as otherwise your living room is 20 degrees at 6 am and we don’t go in there until day 7 pm. That is 13 hours of heating a room which you don’t want.Pondrew wrote: ↑Thu Oct 07, 2021 10:22 pmAll you have to do in that case is change it before you go out. It takes approx 1-3 hours to heat a house by 5 deg c so you would still need to pre-empt your arrival in any case (and remember).
Your normal TRVs on every radiator (except at least one, usually bathroom or hallway) have temperature sensing elements (hence the name thermostatic radiator valves). The vast majority have a scale of 0-5 (with a snowflake between 0 and 1). Zero is off, snowflake is approx 5 deg c, 1 is approx 18 deg c and 5 is approximately 27 deg C, the rest are increments of these.pvr wrote: ↑Thu Oct 07, 2021 9:47 pm Surprising as it is impossible to do it manually, you would have to go in every room to switch the radiator off at 6 am to only heat a bedroom, bathroom and kitchen. Then later in the day do the reverse and open up lounge etc and close off bedrooms. Hence the savings I see
A well balanced system with TRVs, a suitably timed programmer and reasonably set wall thermostat will do everything you need. The ONLY advantage of app based controls is that you can change them without physically moving from room to room and twisting a knob. If you have a routine (which most do), you surely would not normally need to touch them.
I get it and if it works better for you, then happy days.pvr wrote: ↑Fri Oct 08, 2021 8:06 am That is the exact issue, you do need to touch them as otherwise your living room is 20 degrees at 6 am and we don’t go in there until day 7 pm. That is 13 hours of heating a room which you don’t want.
We had a balanced setup years ago, but with different people getting up at different times, the whole house (managed by a central thermostat in the hall) was heated unnecessary. I am surprised you seem to not get that point especially as you seem to be working in that area.
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