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Electric heating only flat

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  • RedFraggle
    RedFraggle Posts: 1,504 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    edited 6 December 2025 at 10:09AM
    Yeah, and I'm running a big screen for my laptop for work 9 hours a day. Ideally I'd like another quantum in bed 2 where I work but the flat isn't wired for that so I just put a new panel heater in to replace the old one when I had the quantums put in. 
    I'd budgeted for up to £300 pcm in the coldest months when I bought the place so it's fine.
    It'd also help if we didn't have a cat as they are always the wrong side of any door so the doors are all open 🤣
    Officially in a clique of idiots
  • Scot_39
    Scot_39 Posts: 4,274 Forumite
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    edited 6 December 2025 at 1:59PM
    Even a big modern LED monitor - uses relatively small amount of power - my own 32" - 26W in normal mode 50W max in gaming / HDR mode - a fraction of old LCD monitors - just like the same tech in modern TVS vs old plasma / LCD flat panels. So thats only half a unit per day.

    Heating your work bedroom space hotter - and with open doors - will mean that its also heating other spaces.

    (I dont even heat my bedrooms / kitchen / bathroom direct most of the time - only the halls).

    Its easy to forget how much it costs to wire and install an expensive high end NSH to benefit from e7 type tariffs - as when crunch numbers - the pay back can be in several years - even if you do pay double the unit rate - say 30p+ day peak vs 15 night.  Say a mid size heater at £1000+ installed - 15p saving would need 6700 kWh.  Many years of heat for one room I suspect

    And yes cold fed electric showers - especially at peak day rate - are a bit of a killer - could you go mixer from immersion tank if have a mains pressure system ?  The pay back could be a lot shorter.
  • RedFraggle
    RedFraggle Posts: 1,504 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    edited 8 December 2025 at 9:07AM
    Scot_39 said:
    Even a big modern LED monitor - uses relatively small amount of power - my own 32" - 26W in normal mode 50W max in gaming / HDR mode - a fraction of old LCD monitors - just like the same tech in modern TVS vs old plasma / LCD flat panels. So thats only half a unit per day.

    Heating your work bedroom space hotter - and with open doors - will mean that its also heating other spaces.

    (I dont even heat my bedrooms / kitchen / bathroom direct most of the time - only the halls).

    Its easy to forget how much it costs to wire and install an expensive high end NSH to benefit from e7 type tariffs - as when crunch numbers - the pay back can be in several years - even if you do pay double the unit rate - say 30p+ day peak vs 15 night.  Say a mid size heater at £1000+ installed - 15p saving would need 6700 kWh.  Many years of heat for one room I suspect

    And yes cold fed electric showers - especially at peak day rate - are a bit of a killer - could you go mixer from immersion tank if have a mains pressure system ?  The pay back could be a lot shorter.
    We have a mixer shower in the other bathroom that runs off the thermal store but I can't easily use it due to disability. 
    I'm not concerned about the bills or trying to cut them. 
    The whole flat is at 18 to 21C except the bathrooms which have fan heaters. 
    Officially in a clique of idiots
  • Scot_39
    Scot_39 Posts: 4,274 Forumite
    Ninth Anniversary 1,000 Posts Name Dropper
    Yes about the only time I use the fan heater in the bathroom is drying after a shower - the rest of the time its kept around 14/15 - just enough to keep mould risk at bay.

    Even it the heat sucked out almost immediately by the extractor fan on to reduce the dampness / humidity. 
  • snowqueen555
    snowqueen555 Posts: 1,588 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Combo Breaker
    edited 10 December 2025 at 9:46AM
    Thanks for the info everyone.

    Turns out the flat used to have storage heaters but the owner got rid of them and the wiring, and E7 is only hooked up to the immersion heater, which is a little pointless because of the electric shower, it's only used for washing.

    So I don't have the wiring to use storage heaters. I have used Chatgpt to ascertain that they draw more power than what a standard plug can muster, so the installation costs is more than just the purchase of the unit, further negating the cost benefits.

    Not only that, it suggests that for a small 2 bed flat where I'll likely be picking and choosing to heat up rooms at a time, the e7 or a dual tariff doesn't make much sense in my scenario.

  • RedFraggle
    RedFraggle Posts: 1,504 Forumite
    Part of the Furniture 1,000 Posts Name Dropper Photogenic
    Quantums will run off a single 24 hour supply
    Officially in a clique of idiots
  • Scot_39
    Scot_39 Posts: 4,274 Forumite
    Ninth Anniversary 1,000 Posts Name Dropper
    edited 10 December 2025 at 7:10PM
    Certainly in the past - the high amp charge input - restricted (only) wiring for my old ones - was specified as a direct spur back to mcb (20A iirc) in CU for each heater.
    The OP doesnt think flat has the original wiring for old NSH.

    Aside
    In fact some modern flats - I've visited a good few in not too distant past - with niece when looking - only have panel heaters from the get go and a timer to restrict on pressurised hot water immersion tanks.  But yet at least some had cold fed showers.


  • WiserMiser
    WiserMiser Posts: 467 Forumite
    100 Posts Name Dropper
    edited 10 December 2025 at 2:37PM
    It's unwise to draw more than about 10A from a 13A socket for long periods.  You can get special 13A plugs and sockets intended for EVs but even they would be unsuitable for the larger Quantums, and the regs probably require a fused spur anyway.
  • You can buy the older style storage heaters that run on one supply 

    I found a brill company who supplied one to me , 
  • Rosie1001 said:
    You can buy the older style storage heaters that run on one supply 
    I found a brill company who supplied one to me , 
    That would be Money Wasting for most people if they're not the HHR type with a fan built-in.
    The capital cost may be lower, but it'll be a false economy.  They leak heat throughout the night when it's not needed, ditto during the day if everyone is at work or school.
    But in the evenings they're at their lowest ebb, so it's a choice of being chilly or topping up at the expensive day rate.
    When it's time to sell the property, old style primitive NSHs won't be a plus point.
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