[Closed] Dyson hot. Really?

I was taught by him at college for some lectures and exercises.
I never got on with him, he was always talking like it was a sales advert for his own talents.

However, it's impossible to ignore his passion and continued success.

Even scuzz's points above could only be a criticism if he or his company was failing in some way. They don't seem to be.

What we all need is one of those wood burny things, if only there was somewhere I could ask people about it...

dyson vacs - had one in the house for over 10 years and it still works just as well as the day I bought it. Having managed hotels and conference centres I can say that yes, Henry's also work but won't last 10 years. We don't buy Dysons because they are not robust enough to be used 3-4 times a day by several different people. dysons would get bashed and knocked about and broken which is exactly what Henry's very simplistic design help them withstand.

Heater sounds/looks like w^nky pishshite to me.

Did you know Sonic Knives are used in Sandwich factories to cut prepackaged Sarnie's that you buy in the shops?

You may not like their stuff but at least they are different and trying to innovate. If it keeps some clever jobs in Blighty (I know Mfg has moved) all to the good.

I like (some of) their products. I don't like how they are marketed. (Although it's impressive). Their marketing strategy is based around 'the way Dyson do things', which is so at odds with the reality of their operation that [for me, at least] it detracts from their appeal.

In writing this post I realised that I hate this kind of marketing. I don't mind companies telling me that their product will enable me to 'be X' or 'feel Y' or 'do Z'.

I don't like companies telling me that they (or their approach) are great, with reasoning based on lies.

Don't forget that they also have a design office with clever jobs in Malaysia 🙂

Not really my point - to clarify, his company makes a song and dance about needing engineering talent, but really they're asking for product designers.

I was joking. Ultimately though - he designs, manufactures and sells [i]products [/i]- there are some engineering ideas being played with but designing with those ideas in mind is what his company is about

It works on a venturi principal.

incorrect
The Coand? Effect

Incorrect.

Both Venturi and Coanda

So its an F1 car heater?

Did you know Sonic Knives are used in Sandwich factories to cut prepackaged Sarnie's that you buy in the shops?

The real scandal about sandwiches is that the two halves of a sandwich that you get in a packet aren't actually the same sandwich, they are from two different sandwiches. Shocking.

That makes me almost as sad as the advert about two Twix bars who want to die together...

The Dyson Hot may project the air into the room better but in principle it is no different to any other fan heater so I cant see how it would be more efficient, especially compared to CH.

Electric fan heaters are 100% efficient.

Electric fan heaters are 100% efficient.

Scuzz, I may be incorrect, but it does sound a bit like you don't like them because they didn't give you the job you applied for ? 😕

Can I rant again about incandescent light bulbs now?

Specifically, changing all your light bulbs to energy-saving ones does nothing for the environment as the energy that was lost as heat is now made up by your central heating running a bit more. It might make sense in a hot climate, not ours.

Scuzz, I may be incorrect, but it does sound a bit like you don't like them because they didn't give you the job you applied for ?

maccruiskeen, sorry smilies had been adblocked for some reason! 😀

Almost right then 😉

Can I rant again about incandescent light bulbs now?
Specifically, changing all your light bulbs to energy-saving ones does nothing for the environment as the energy that was lost as heat is now made up by your central heating running a bit more. It might make sense in a hot climate, not ours.

Interesting theory.

Do you have any figures or evidence for that, or is it just an idea ?

(Genuine question by the way, not having a dig)

Specifically, changing all your light bulbs to energy-saving ones does nothing for the environment as the energy that was lost as heat is now made up by your central heating running a bit more. It might make sense in a hot climate, not ours.

That's not true/ irrelevant for a few reasons:

1. Incandescents waste heat for the 5 months a year your CH is switched off.
2. Heating by resistance electric costs three times as much as heating by gas CH. It also emits three times the CO2.
3. Heat from the bulbs is always at ceiling level where it isn't much use.
4. Useful heat contribution is trivial. A gas boiler is pumping out say 15,000W. Any extra to compensate for not having incandescents at 60W each would be too small to measure.

Specifically, changing all your light bulbs to energy-saving ones does nothing for the environment as the energy that was lost as heat is now made up by your central heating running a bit more. It might make sense in a hot climate, not ours.

That's been claimed many times, but there have also been counter claims:

1) the heat generated by incandescent lamps stays up at the ceiling where it's generated and
2) incandescent lamps are not a very efficient way of generating heat.

So your central heating system is actually more efficient, so energy is saved.

The real scandal about sandwiches is that the two halves of a sandwich that you get in a packet aren't actually the same sandwich, they are from two different sandwiches. Shocking.

I dispute that. Why yes, I have actually opened up the sandwiches and matched the two halves together.

Is there an echo in here? 🙂

Do you have any figures or evidence for that, or is it just an idea ?

Well, it came about from Sunday dinner with my dad (also a physicist). Problem with incandescents is they "waste" 80% of power as heat. But that's heat inside your house, which is normally (at least in this country, and especially during the times you're most likely to have lights on) being heated. That heat is usually regulated by a thermostat, so if you remove the heat provided by the incandescent bulbs it'll just make the thermostat stay on a bit longer.

Now there are differences - is a gas boiler better at providing heat (from an environmental standpoint) than an electric heater? Is it better financially to use gas or electricity?

The conclusion we came to after a bottle of wine was that energy-saving bulbs were a quick fix to make people feel that they were making a difference, without actually having to do something proper about reducing energy.

The real scandal about sandwiches is that the two halves of a sandwich that you get in a packet aren't actually the same sandwich, they are from two different sandwiches. Shocking.

The greatest claim any human has ever made in the history of humanity. Possibly?

1. Incandescents waste heat for the 5 months a year your CH is switched off.
2. Heating by resistance electric costs three times as much as heating by gas CH. It also emits three times the CO2.
3. Heat from the bulbs is always at ceiling level where it isn't much use.
4. Useful heat contribution is trivial. A gas boiler is pumping out say 15,000W. Any extra to compensate for not having incandescents at 60W each would be too small to measure.

1. When it's daylight and you're less likely to use lights. Especially in Scotland.
2. Hmm. I'd need to see the figures, but is a gas boiler really more efficient than a power station?
3. Most heat from radiators also rises to the ceiling. But the heat from incandescents is mostly IR, which doesn't rise.
4. Therefore useful energy saving is also trivial 🙂

it does sound a bit like you don't like them because they didn't give you the job you applied for

1. When it's daylight and you're less likely to use lights. Especially in Scotland.
2. Hmm. I'd need to see the figures, but is a gas boiler really more efficient than a power station?
3. Most heat from radiators also rises to the ceiling. But the heat from incandescents is mostly IR, which doesn't rise.
4. Therefore useful energy saving is also trivial

1. Only really true in high summer. There's still a significant amount of lighting needed in the period May-September.
2. Much more so. A modern condensing boiler is more than 90% efficient. You get less than 50% efficiency from mains electricity supply. The carbon factors bear this out - check them! And I repeat - electricity is about 3x the cost of gas.
3. The IR heats the glass which produces convection currents. Useless at ceiling level.
4. It's true that lighting is a relatively small % of household energy consumption, that doesn't mean it's not worth making more efficient.

Well, it came about from Sunday dinner with my dad (also a physicist).

Do you really think you are the first people to think of this? It's been done to death, seriously. Google it.

Most heat from radiators also rises to the ceiling.

Yes, but on the way to the ceiling it heats the walls and objects near the radiator. Your hands can verify this.

Put it this way. If you wanted to heat a room, would you put radiators on the ceiling?

Woah, people are taking this rather seriously 🙂

It's been done to death, seriously. Google it.

I'm sure it has. But I'd still prefer to insulate my loft a bit more and use lightbulbs that work.

Put it this way. If you wanted to heat a room, would you put radiators on the ceiling?

We shouldn't really call them radiators, should we? They're convectors. Anyhow, radiant heaters mounted high up are a common solution in industry - I've even got one in my workshop.

If you wanted to heat a room, would you put radiators on the ceiling?

There's no room there. Lionel Richie would get in the way.

Dammit beaten to the punchline!

But I'd still prefer to insulate my loft a bit more and use lightbulbs that work.

My CFLs work fine. But then, I choose decent ones. They do vary a lot.

And my loft is already insulated a lot 🙂

So lets all be honest, how many of the thread contributors actually work at Dyson?

How many work for the Lightbulb Marketing Board?

If we are doing tangents, is Dyson the opposite of Starbucks?

Ie people frown because he outsources production abroad to save costs, and therefore not a massive UK employer given the ubiquity and Britishness of the brand, but Dyson claims to pay his taxes properly in the UK based on the profit he makes from trading in the UK.

PS FWIW we had a couple of Henrys and a James at work, now we have a couple of sebos and I had an oreck in a furnished flat I used to rent. They all suck reasonably well (particularly the oreck which is like the big dumb v8 of the vacuum cleaner world), but I would still choose a dyson for my home, even a cylinder/hose one.