Anyone used Rointe heaters?

Ectophile

I've done a quick experiment using a cheap 2kW fan heater, on fan-only mode.  It took about 16W.

If the power to the motor didn't end up as heat, that would make this particular fan heater 99.2% efficient.  So as close to 100% as makes no odds.

But much of that 16W is going to end up making the motor windings warm.  Which means it's turning into heat.  Unless I point the fan out of the window, the kinetic energy of the moving air is going to have to go somewhere sooner or later.  That somewhere is going to be mostly low-grade heat.

And now my room smells of burning dust.  I don't use that heater very often.

Reed_Richards

It occurred to me that if you had a fan heater that caught fire you would achieve more than 100% efficiency because of the additional heat from the combustion.  But that would be a one-off occurrence and so not really a practical solution to heating your home.  

tim_p

Reed_Richards said:

It occurred to me that if you had a fan heater that caught fire you would achieve more than 100% efficiency because of the additional heat from the combustion.  But that would be a one-off occurrence and so not really a practical solution to heating your home.  

Still potentially cheaper than some of these magic dust heaters!  Although the smoke and fumes might be a downside. 

Cristos

Cardew said:

Cristos said:

Also how do you know a fan heater is 100% efficient. That sounds like nonsense to me. There will be different components  turning electricity to heat with varying efficiency and loss. The power to turn the motor makes your claim not make sense.

Probably more likely that the rointe are getting closer to being 100% efficient and that the cheaper tech never got anywhere close to 100% efficiency.

Impossible I'm afraid and clearly total nonsense. Try providing some proper arguments? For example the power to drive the fan. Losses and inefficiency in the components? Losses in transfer of heat through the materials? I don't believe any heater could possibly be 100% efficient its litterally scientifically impossible. The efficiency of watts consumption to watts in heat output will vary dramatically and fan heaters rate amongst the poorest.

The 100% efficiency is nor our 'opinion'! We are simply quoting a gentleman by the name of Albert Einstein. A century ago he famously stated “Energy cannot be created or destroyed; it can only be changed from one form to another.” scientists the world over agree with him; and now along comes Cristos and 'proves' Einstein was wrong!

I think you need to go back to school my friend  Emergy is lost in all the stages. The noise from the fan. That's energy. The motor turning again uses energy. The air moving again energy. The list goes on. If you had any understanding of the components used for these heaters you would also understand the losses in those too. Really to claim such nonsense in the name of Einstein should really get you banned from a site like this. I'll leave you to dream of your 100% efficient heater :-)

Cristos

Ectophile said:

I've done a quick experiment using a cheap 2kW fan heater, on fan-only mode.  It took about 16W.

If the power to the motor didn't end up as heat, that would make this particular fan heater 99.2% efficient.  So as close to 100% as makes no odds.

But much of that 16W is going to end up making the motor windings warm.  Which means it's turning into heat.  Unless I point the fan out of the window, the kinetic energy of the moving air is going to have to go somewhere sooner or later.  That somewhere is going to be mostly low-grade heat.

And now my room smells of burning dust.  I don't use that heater very often.

You still need to calculate the amount of heat generated by the resistance. It won't equal the electricity used. Different materials have different properties. But I'm glad you acknowledge this nonsense of 100% efficiency. 

Cristos

https://www.livescience.com/50941-second-law-thermodynamics.html

Ectophile

Cristos said:

Ectophile said:

I've done a quick experiment using a cheap 2kW fan heater, on fan-only mode.  It took about 16W.

If the power to the motor didn't end up as heat, that would make this particular fan heater 99.2% efficient.  So as close to 100% as makes no odds.

But much of that 16W is going to end up making the motor windings warm.  Which means it's turning into heat.  Unless I point the fan out of the window, the kinetic energy of the moving air is going to have to go somewhere sooner or later.  That somewhere is going to be mostly low-grade heat.

And now my room smells of burning dust.  I don't use that heater very often.

You still need to calculate the amount of heat generated by the resistance. It won't equal the electricity used. Different materials have different properties. But I'm glad you acknowledge this nonsense of 100% efficiency. 

You seem to be ignorint the ultimate fate of the energy.  There's a lot of heat.  A bit of kinetic energy in the moving air.  A bit of sound energy.

But the air doesn't swirl round and around getting faster and faster as the fan pushes it.  And the sound doesn't get louder and louder as it echoes off the walls.

Sooner or later, the moving air is slowed down by friction, and the energy becomes low grade heat.  The sound is absorbed by furnishings, where friction turns it into low grade heat.

The amount of energy that escapes being turned into heat is negligible.

coffeehound

Well if Rointe hired him as an agitator, they're certainly getting their money's worth!  

Reed_Richards

Maybe he gets paid per post?

rp1974

Not for all 12,surely not,imagine the expense.