cardboard "walls" and infrared heaters

[Harry Bloomfield]

That is precisely what i want.
I do not want to warm the whole room, just a bit of direct heat on me.
BUT without stirring up any dusty particles.

IR warms up objects in the beam of the IR, the air much less so. You still get 100% efficient delivery of your Kw, which ever method is chosen for delivery. Neither I, Good Housekeeping, nor certainly heater manufactures can defy the laws of physics.

 

[H8diy]

I'm afraid they are wrong!
They are confusing the power output/cost in electricity used with 'efficiency' - the heater used the least amount of energy in their tests, because it simply had the lowest maximum output.

As has been suggested, all electric heaters are 100% efficient, it's just they heat the room, or you, in different ways.

Thanks for replying.
And i want to heat me - not the room.
I also don't want to create dust floating around, or make a noise.

 

[H8diy]

IR warms up objects in the beam of the IR, the air much less so. You still get 100% efficient delivery of your Kw, which ever method is chosen for delivery. Neither I, Good Housekeeping, nor certainly heater manufactures can defy the laws of physics.

I am only concerned with the efficiency of heating me.
You are right about the conservation of energy but i don't want to warm, and stir up, the air.
Plus it's not just Good Housekeeping. i've just found a number of other saying similar, e.g.

Please note the citation: "also very energy efficient and you can end up spending less on lecy".
...and they're not even considering my plans for solar driving them.

 

[RandomGrinch]

Thanks for replying.
And i want to heat me - not the room.
I also don't want to create dust floating around, or make a noise.

Yes, fair enough.
But arguments about efficiency should be ignored when looking at your choices. We have debunked some manufacturers claims on here before.
As to your original question about how to mount one, I think I prefer the reline the wall with plasterboard idea, or you could simply have one board that stood out in relief on the wall - there would be very little decoration needed, just paint, for a very slim chimney breast effect!

 

[RandomGrinch]

Please note the citation: "also very energy efficient and you can end up spending less on lecy".

Again, they are incorrect!

 

[H8diy]

Again, they are incorrect!

But only as a scientist.
Not as I intend to use it.

 

[Harry Bloomfield]

Thanks for replying.
And i want to heat me - not the room.
I also don't want to create dust floating around, or make a noise.

You can buy portable IR heaters for as little as £15. They work as well, as efficiently as wall mounted ones, and better yet - you can move them around, to give you maximum benefit from them when on.

 

[RandomGrinch]

But only as a scientist.
Not as I intend to use it.

Yes, but some of us may be scientists and we don't like the idea of people being misled by certain manufacturers, or the media's claims about efficiency, etc.

 

[Harry Bloomfield]

Please note the citation: "also very energy efficient and you can end up spending less on lecy".
...and they're not even considering my plans for solar driving them.

Is Good Housekeeping completely independent, or are they supported by advertising, is the first question you need to be asking.

As has been pointed out to you, they are not, and cannot possibly be more energy efficient and it is very unfair, to compare them to ceramic heaters, which are yet another scam. The one valid point, is that IR is more useful in a poorly insulated space, but only providing you place yourself in the IR beam. Move out of the beam, and you may find it cold.

Really, the best solution is proper room heating, in a well insulated space.

 

[foxhole]

Thanks for replying.
And i want to heat me - not the room.
I also don't want to create dust floating around, or make a noise.

Dust floats around, any heat source increases the air movement and therefor the dust.

 

[Mike13]

I've not switched it on so i can't confirm but the sales blurb & pics specifically claim the IR only goes forward, ok the unit itself may well get hot but i can turn it down to 35C and that suits me as i don't want warming massively quickly, gentle warming is far better and probably far more efficient.

How are they suspending the laws of physics to achieve that, they need an extra magic insulator behind the panel!
You have a flat plate heater at 90C or so, they can improve the emissivity on the outside which makes a few percent difference, but conducted heat still makes its way out of the back of the panel, entirely driven by the U factor of the various layers to the outside world, which will usually be colder than the room and that increases the conducted losses.

You need to increase the insulation in the rest of the room first, then you wont need so much heat anyway.

 

[Harry Bloomfield]

How are they suspending the laws of physics to achieve that, they need an extra magic insulator behind the panel!
You have a flat plate heater at 90C or so,

IR heaters run much hotter than that, they run at red heat.

You need to increase the insulation in the rest of the room first, then you wont need so much heat anyway.

Yep!

 

[Mike13]

A 1 sq metre panel needs to be at about 120C to deliver 1 kW into a fairly typical cool room, the rod type needs to run much hotter and that will create its own significant convection currents.

 

[H8diy]

Again, they are incorrect!

Yesterday i was up before 6 and it was nippy.
As i sat down with my breky and coffee i switched IR panel heater on and before i'd eaten half a bowl of cereal all around me was warming. I felt like that old Ready-Break TV advert/nuclear energy skit.
However, the rest of the room was not warmed - so no money wasted.
FAR heaters direct the heat.
I didn't want to heat any more of the house, or room, as i was going out.
Shortly before bed time it was again nippy, again FAR heater on for literally a few minutes to just give me a quick "glow" and then off as i did not want to warm the house/room.

And no, a fan heater would BLOW, not just "stir", any dust/pollen/whatever that was around.

 

[H8diy]

A 1 sq metre panel needs to be at about 120C to deliver 1 kW into a fairly typical cool room, the rod type needs to run much hotter and that will create its own significant convection curre

plez see #32