ToughButterCup Posted January 3, 2018 Share Posted January 3, 2018 Anyone recommend a cheap oil-filled radiator? Or suggest one type to avoid? Link to comment Share on other sites More sharing options...
ProDave Posted January 3, 2018 Share Posted January 3, 2018 Why oil filled? I already mentioned the cheap convector heaters CPC had on offer recently. If you want I will find the link again. Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 3, 2018 Author Share Posted January 3, 2018 4 minutes ago, ProDave said: Why oil filled? [...] Because my mind is so full of other stuff. I do remember and thanks, I'll do some research based on your lead. Thanks Dave Ian Link to comment Share on other sites More sharing options...
SteamyTea Posted January 3, 2018 Share Posted January 3, 2018 That was going to be my question. The only reason I can think for wanting oil filled rads is that they run at a lower temperature and can be covered over more safely i.e. wet washing. Though I would never recommend coving radiators of any sort. If you want to heat air, heat the air. Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 3, 2018 Author Share Posted January 3, 2018 2 minutes ago, SteamyTea said: [...] If you want to heat air, heat the air. That's what I like: simple. I can do that. Link to comment Share on other sites More sharing options...
ProDave Posted January 3, 2018 Share Posted January 3, 2018 If you must have oil filled http://cpc.farnell.com/search?st=oil filled radiator But they are more expensive than convector heaters this is the one that is still on special offer http://cpc.farnell.com/pro-elec/pel00022/convector-heater/dp/HG0091607?ost=hg0091607&iscrfnonsku=false&ddkey=http%3Aen-CPC%2FCPC_United_Kingdom%2Fsearch I bought 3 of them to keep the caravan warm. There is also a version with a timer built in for slightly more http://cpc.farnell.com/pro-elec/pel00023/convector-heater-with-timer-turbo/dp/HG0091707?ost=hg0091707&iscrfnonsku=false&ddkey=http%3Aen-CPC%2FCPC_United_Kingdom%2Fsearch Link to comment Share on other sites More sharing options...
A_L Posted January 3, 2018 Share Posted January 3, 2018 3 hours ago, recoveringacademic said: Anyone recommend a cheap oil-filled radiator? Lidl £40/2.4kW/3yr g'tee - https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=9237 Aldi - £18/0.6kW/3yr g'tee - https://www.aldi.co.uk/easy-home-mini-oil-filled-radiator/p/081990189915100 Link to comment Share on other sites More sharing options...
ToughButterCup Posted January 3, 2018 Author Share Posted January 3, 2018 Thanks very much everyone for your help. Ian Link to comment Share on other sites More sharing options...
TerryE Posted December 4, 2022 Share Posted December 4, 2022 (edited) As a codicil to this, you need to be deeply suspicious of any power claims for these radiators. I thought that my old rad was big and clunky so I got a couple of these Freestanding Oil-Filled Radiators at a nominal 1½ kW from Screwfix. My intent was to control them from my HA system using power monitoring smart plugs. No matter what power setting you choose, they only output roughly half a kilowatt. Yes you can toggle between the ½, 1 and 1½ heater options but the heater heats the oil and cuts out when the oil is about 50°C. The oil does a convection circulation through ducts in the fins and hence the fins only heat up to about 45°C or so. If you do the fins have a total surface area of ~1 m² at a Δt ~ 25°C. Radiative + convective emission is going to be ~20W/K/m² so the radiator can only output ~½ kW tops. At the 1 kW setting the heater switches on a 1:1 mark:space ratio; at the 1½ kW setting the heater switches on a 1:2 mark:space ratio. Hence the effective output is always ½ kW. My old big and clunky had external baffling and the (i) the internal fins could run a lot hotter without a surface scald risk, and (ii) this double structure ducts the air through the rad, thus improving specific emission. Double bonus = about 1¼ kW output. 🙄 Edited December 4, 2022 by TerryE 2 Link to comment Share on other sites More sharing options...
Temp Posted December 4, 2022 Share Posted December 4, 2022 @TerryE Interesting post. It suggests convection isn't enough to extract more than about 0.5kw from the rad. Adding some fans might help. Link to comment Share on other sites More sharing options...
TerryE Posted December 5, 2022 Share Posted December 5, 2022 @Temp, yup it's really a design flaw / characteristic mismatch with the market labelling. One would expect a radiator marketed as 1500W is capable of heating at roughly that output. Reading a range of review on Screwfix and Amazon, they broadly fall into one of extremes: (The user only needs ½kW): wonderful little heater ***** (The user only needs more than ½kW): useless; doesn't heat the room * Each only cost me £30 + another £10 for the MQTT-enabled SmartPlug with power monitoring, so I will use both at opposite ends of the landing during the coldest months so I can use my HA system to top-up the upstairs heat using off-peak electricity. Link to comment Share on other sites More sharing options...
ToughButterCup Posted December 9, 2022 Author Share Posted December 9, 2022 Very interesting indeed Terry. Thanks. Ian Link to comment Share on other sites More sharing options...
TerryE Posted December 10, 2022 Share Posted December 10, 2022 Yup, something like De'Longhi Dragon 4 TRD40820T Oil Filled Radiator- White where the fins are encapsulated and can thus run safely hot, rather than CYBL20-7 Freestanding 7-Fin Oil-Filled Radiator 1500W. You get what you pay for. Link to comment Share on other sites More sharing options...
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