Scottish Power rate disparity

RebTech

By over specified what I meant was this 3x5m room has a 3.4kW heater (Dimplex XL24N).

But also, the thermostat has failed, which was kind-of ok before when the charge was RTS controlled according to the weather forecast and the official recommendation was just to leave the input control at full. Right now I'm switching on and off at the wall, luckily I'm a very early riser.

That was the second thermostat, which failed after just a year or so, and I never bothered to replace it. It's now looking like I'm going to have to do that, hope they're still available! I must admit the Octopus Snug thing looks very good. Thanks a lot guys.

Swipe

RebTech said:

By over specified what I meant was this 3x5m room has a 3.4kW heater (Dimplex XL24N).

But also, the thermostat has failed, which was kind-of ok before when the charge was RTS controlled according to the weather forecast and the official recommendation was just to leave the input control at full. Right now I'm switching on and off at the wall, luckily I'm a very early riser.

That was the second thermostat, which failed after just a year or so, and I never bothered to replace it. It's now looking like I'm going to have to do that, hope they're still available! I must admit the Octopus Snug thing looks very good. Thanks a lot guys.

Snug allows the customer to select the number of hours the off peak ALCS is active for, so that could be another workaround if you are unable to source a replacement thermostat (unlikley).

Scot_39

RebTech said:

By over specified what I meant was this 3x5m room has a 3.4kW heater (Dimplex XL24N).

But also, the thermostat has failed, which was kind-of ok before when the charge was RTS controlled according to the weather forecast and the official recommendation was just to leave the input control at full. Right now I'm switching on and off at the wall, luckily I'm a very early riser.

That was the second thermostat, which failed after just a year or so, and I never bothered to replace it. It's now looking like I'm going to have to do that, hope they're still available! I must admit the Octopus Snug thing looks very good. Thanks a lot guys.

3.4 kWh is the input rating.

The output more likely ave c1kW - or equivalent of an old style 1 bar fire.

Its really not that big for a 3x5 room.

Your landlord is very likely to be advised / if not obligated to update that to a new hhr before reletting under proposals a whilst back - just not sure if happened in end

QrizB

Scot_39 said:

RebTech said:

By over specified what I meant was this 3x5m room has a 3.4kW heater (Dimplex XL24N).

3.4 kWh is the input rating.
The output more likely ave c1kW - or equivalent of an old style 1 bar fire.

To aid the OP's understanding, the XL24N has a nominal storage capacity of 24kWh (hence the 24 in the name). In practice the amount of heat stored will depend on various factors and may be lower.

If it is then asked to release it's heat steadily over the full day, it will be equivalent to a 1kW heater for 24 hours.

Scot_39 said:

Its really not that big for a 3x5 room.

Agreed. My dining room is that sort of size and has a 1700 watt double-panel CH radiator.

RebTech

QrizB said:

To aid the OP's understanding, the XL24N has a nominal storage capacity of 24kWh (hence the 24 in the name). In practice the amount of heat stored will depend on various factors and may be lower.

If it is then asked to release it's heat steadily over the full day, it will be equivalent to a 1kW heater for 24 hours.

Sorry but isn't that overly theoretical? Do even modern NSHs work that well? Maybe they do, I don't know, but mine (maybe 30yrs old) certainly doesn't. Nor would it manage 2kW over 12hrs. Or it might average that but the actual output would much higher to begin with and much lower towards the end of the period. Certainly the room's been very much hotter at times than a one bar fire could ever get it. Also, before most of them got updated, people often remarked on how overheated the flats in this block used to be.

QrizB

RebTech said:

QrizB said:

To aid the OP's understanding, the XL24N has a nominal storage capacity of 24kWh (hence the 24 in the name). In practice the amount of heat stored will depend on various factors and may be lower.

If it is then asked to release it's heat steadily over the full day, it will be equivalent to a 1kW heater for 24 hours.

Sorry but isn't that overly theoretical? 

Theoretical? Yes. Overly so? No.

RebTech said:

Do even modern NSHs work that well? Maybe they do...

Yes they do.

RebTech said:

..., I don't know, but mine (maybe 30yrs old) certainly doesn't. Nor would it manage 2kW over 12hrs. Or it might average that but the actual output would much higher to begin with and much lower towards the end of the period.

Your XL24N has an "output" control that adjusts the dampers (flpas). With the dampers closed, the output should be somewhat less than 1kW. With them open, it'll be much higher. 

Conventional storage heaters need manual adjustment; they're not set-and-forget.

By adjusting the dampers through the day you will be able to control the heat released.

https://www.manualslib.com/manual/761553/Dimplex-Xl6n.html?page=6#manual

RebTech said:

Certainly the room's been very much hotter at times than a one bar fire could ever get it.

Were the dampers open or closed at that time?

RebTech

The dampers were never open.