Aluminium house radiators are they worth it?

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  • Aluminium house radiators are they worth it?
  • 29erKeith
    Member

    I’ll be replacing all of the radiators in the house very shortly I’m tempted by aluminium for responsiveness, efficiency?, lighter weight and maybe? a bit smaller for the same output

    anybody got any real world experiences with them? Are they work the bit extra that they initially cost? or should I just stick to bog standard steel ones?

    cheers

    cynic-al
    Member

    They look cool, that would swing it for me.

    I’ve never thought “OMG my steel radiators are responding slowly”.

    hora
    Member

    It depends. I like the zing they have when heating and cooling and they have a great feel.

    29erKeith
    Member

    Hmmm two extra good qualities, no negative but still not 100% sure they’re worth the extra wonga on what is a tight budget.

    undecided πŸ˜•

    Premier Icon glenh
    Subscriber

    Hmm, I’ve often found that steel is a terrible conductor of heat and often stays cold on one side when the other is in contact with hot water; so I’d say go for it.

    Premier Icon Stoner
    Subscriber

    I installed ally one sin the barn.
    Mainly because they were the cheapest way of getting ones that didnt look like they came from screwfix.

    I got these
    http://www.theradiatorcompany.co.uk/product_details/?catid=Mix

    They work well, quickly, low volume, and convect well.
    dont really have many pics of them

    but we have 3 of them fitted with towel rails, esp the 1.8m tall one in the bathroom. Works as a radiator and a towel rail – which radiators and towel rails cant manage on their own!

    Might take some pics some time.

    Premier Icon glenh
    Subscriber

    p.s. diamond is the best heat conductor, so you’d be better off with diamond radiators really.

    29erKeith
    Member

    Now that’s sounds more convincing cheers

    I did sized up everything we needed last night and did a price comparison last night between steel and ally

    result was Β£1035 for steel and Β£1350 for ally

    steel ones seem way way cheaper than ally for the conventional shape ones (Long and low) but a bit more expensive for upright ones.

    We decided to go for about 50/50 between uprights and more conventional shaped ones so the price difference isn’t as big. If you went for all conventional shaped ones throughout the price difference would be much much bigger

    The final decision was ally! 8) This has been approved by Mrs 29er πŸ˜†

    joao3v16
    Member

    lighter weight

    How does this matter?

    Are you planning on carrying it around the house with you to heat whichever room you’re in at the time?

    29erKeith
    Member

    it’ll be a hell of a lot easier for me to fit them on my own

    Premier Icon molgrips
    Subscriber

    Yeah but the fatigue resistance is lower so remember to check for cracks. And although ali is stiffer, the extra give of steel makes for a more lively supple ride. Steel is real!

    Premier Icon thepurist
    Subscriber

    glenh – Member

    p.s. diamond is the best heat conductor, so you’d be better off with diamond radiators really.

    So carbon wins yet again πŸ˜€

    Premier Icon Stoner
    Subscriber

    Keith, ‘ere you go. A pic of the tall one with towel holders on.

    Premier Icon Stoner
    Subscriber

    p.s. diamond is the best heat conductor

    I did not know this. Is it really true?

    Im assuming it isnt true of carbon as man from Shimano says here:

    As for material, a carbon frame isn’t going to dissipate heat from the caliper any.

    http://www.bikerumor.com/2012/02/14/road-bike-disc-brakes-are-coming-but-will-they-work/

    Rob Hilton
    Member

    They work well, quickly, low volume, and convect well.

    Isn’t it where they’re positioned that gets the convection current going? E.g. under a window works better than on an internal wall.

    Premier Icon aracer
    Subscriber

    Im assuming it isnt true of carbon

    Carbon fibres != diamond

    Premier Icon Stoner
    Subscriber

    doh, you know what I mean smartarse πŸ˜‰

    29erKeith
    Member

    cheers for all of the helpful answers

    πŸ˜† and πŸ™„ at the rest

    Premier Icon Stoner
    Subscriber

    the chilling of air at a window causes it to fall (convect downwards) whcih then creates a moving pool of colder air at low level. If you put the radiator on the opposing wall, it’s rising convection will pull the colder air along the floor as a chilling draught. A radiator under the window is intended to counteract that falling cool air flow.

    Air flow and heat transfer through the radiator is a function of it’s design, fins and vents etc.

    Old steel single panel rads are not very good. Modern double rads with fins in the centre convect well. Ive found my aluminium ones do too and I wouldnt be surprised if the funny design to the top of them is to help move the convecting warm air up and out into the room.

    29erKeith
    Member

    Stoner yeah we’ll be ordering 4 very similar to those

    I think I’ll put the order in tomorrow from these guys
    http://www.traderadiators.com/

    29erKeith
    Member

    yeah there are loads of funky shaped ally ones which look very much like that’s what they’re trying to achieve e.g.

    cynic-al
    Member

    Surely a radiator’s ability to heat is defined purely by its BTU – an alu rad may be lighter, smaller etc, but what is the performance advantage?

    Having said that I do like your stoner, but I couldn’t see one like that on your website – do you have a link?

    Premier Icon Stoner
    Subscriber

    they didnt do a tall one in the Mix range so I had to get the Oscar
    http://www.theradiatorcompany.co.uk/product_details/?catid=Oscar

    IIRC aluminium radiators have a higher btu/Wattage /size than steel ones. You also dont get rust issues with Al. You need a different kind of inhibitor though.

    cynic-al
    Member

    Ah…so you can’t mix and match?

    Premier Icon Stoner
    Subscriber

    dont see why not. you might just need to make a cocktail of fernox products πŸ™‚ Fernox and the radiator companies would be the guys to ask.

    Premier Icon 40mpg
    Subscriber

    Any issues with having alu and steel on the same circuit?
    Do you need different corrosion inhibitor for alu rads?

    I’ll ask my services manager when he returns from the pastry van.

    Edit – beaten to it!

    cynic-al
    Member

    Hmmm…

    Where did you get the towel-rail-y things?

    Bear
    Member

    Sentinel X100 suitable for all metals.

    thomthumb
    Member

    Surely a radiator’s ability to heat is defined purely by its BTU – an alu rad may be lighter, smaller etc, but what is the performance advantage?

    I’d guess that alu should be more responsive. heat up a room quicker, conversely it probably cools down quicker too after the boiler is off.

    Premier Icon Stoner
    Subscriber

    useful to know bear.

    BTW, what do you do with large thermal store systems where you might have over a 1000 litres. It cant be cost effective to use inhibitor at the recommended concentration?

    At the moment I have no inhibitor in my system because it would cost so much and I know I really ought to add some sometime.

    Premier Icon 40mpg
    Subscriber

    OK my services manager says its OK to mix and match steel & alu, just get the right inhibitor.

    29erKeith
    Member

    There’s a bay window in one of our rooms with a fairly low window sill, we can get a 5000BTU ally rad that fits perfectly but could only get 3200BTU from a double steel jobbie so would have needed an extra rad in the room else where or an expensive custom bay one

    oh good point though I did have a small steel towel rad for the downstairs toilet, I’d best change that for an ally one too so we’re 100% ally then

    29erKeith
    Member

    ahh cool cheers Al’ looks might I might be ok with the little towel one that the Mrs wanted

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