5 ms·

Maybe because they were bold enough to make the trade-off. In a competition hand dryer that doesn't really work vs one that damages your hearing... I'll keep we

Maybe because they were bold enough to make the trade-off. In a competition hand dryer that doesn't really work vs one that damages your hearing... I'll keep wet hands thanks.

TeMPOraL 7y ago
That damages your hearing? Surely there must be a space between. Long time ago in a McDonald's in Poland I used one that would dry your hands in 5 seconds flat. It was powerful and loud, but only as loud as a blender. Which is loud, but not painful or damaging to ears... EDIT: it looked similar to this one: https://www.qbicwashrooms.co.uk/magnum-multidry-hand-dryer-white.html https://www.qbicwashrooms.co.uk/magnum-multidry-hand-dryer-w... Except it had even lower power rating. I don't get why this states "25 seconds". Do people have hands made from sponge?
- afandian 7y ago
  All I know is that Dyson hand dryers and Animal vacuum cleaners are well above my pain threshold. I think using them regularly certainly would damage my hearing. I actively avoid them. It's down to diversity, I suppose. I'm no super-hearer (I don't really think my hearing is different to anyone else's) but obviously the engineers at Dyson didn't care about people like me. I use another brand of 'blade' type dryers (I forget which) every day and it's fine.
- dpark 7y ago
  > I don't get why this states "25 seconds". Do people have hands made from sponge? I don’t know why 25 seconds is hard to believe. That’s the manufacturer’s claim. I’d imagine if anything their claim is optimistic and the 60 seconds people claim is more realistic. If you have washed your hands properly, you’ll have several milliliters of water spread across the surface. Slow blowing warm air isn’t going to dry that off in 5 seconds.
  - carlmr 7y ago
    There was this TED talk once about shaking your hands twice to only need one towel. I've been doing it ever since and an Airblade will dry my hands in 10 seconds.
    - jack2 7y ago
      Only it was twelve times.
      - carlmr 7y ago
        Thank you, I guess I misremembered. But 2-3 times works for me.
    - Lewton 7y ago
      It's 12 times and leaves quite a mess
      - TeMPOraL 7y ago
        That's what the sink is for.
        carlmr 7y ago
        Yeah, I apparently misremembered the number (I guess I'm lazy to go for 2-3 usually, but I think it's the 20% effort that gets you 80% there). And I never had a mess cause I do it over the sink.
  - TeMPOraL 7y ago
    > I don’t know why 25 seconds is hard to believe. Because it's 2.5 kilowatt blower making 78 dB of noise, according to the technical spec under that link. With these parameters, you should be able to dry your hands in 5 seconds while keeping them a meter away. Like with the one I mentioned seeing in that McDonald's, which was AFAIR rated at something around 1.2 kW (and I remember thinking that's already impressive for a hand dryer). > Slow blowing warm air isn’t going to dry that off in 5 seconds. But fast blowing, slightly less warm air would. I was subtly suggesting that the reason may be what 'carlmr mentioned in a parallel reply - maybe people don't shake off the water after washing their hands, preferring instead to both waste their time at the dryer and add work to the cleaning stuff that now has extra water to mop off the floor?
    - dpark 7y ago
      > Because it's 2.5 kilowatt blower making 78 dB of noise, according to the technical spec under that link. With these parameters, you should be able to dry your hands in 5 seconds while keeping them a meter away. This is a really bizarre statement. You throw some numbers up and then say “obviously it should work how I said”. But it’s not obvious at all. Those numbers don’t intuitively tell me that it should my hands in 5 seconds. Indeed my intuition (and that manufacturer’s specs) says that’s wildly inaccurate. I’m really confused by your “1 meter away” claim. At a meter away you’re basically just waiting for ambient air to dry your hands. The fact that they measure decibels a meter away doesn’t mean that’s where your hands should be.
      - TeMPOraL 7y ago
        My statement is this: I've used a sub-2kW blower that could dry hands in below 10 seconds, was loud but not painful, and if you somehow made it portable, it could double as a leaf blower in a pinch. 1 meter from the nozzle the stream was still powerful enough to dry hands faster than ambient air. So the numbers people throw around this thread are weird, they imply unrealisticly wet hands, or ridiculously inefficient dryers.
        dpark 7y ago

Maybe because they were bold enough to make the trade-off. In a competition hand dryer that doesn't really work vs one that damages your hearing... I'll keep wet hands thanks.

TeMPOraL 7y ago

That damages your hearing? Surely there must be a space between. Long time ago in a McDonald's in Poland I used one that would dry your hands in 5 seconds flat. It was powerful and loud, but only as loud as a blender. Which is loud, but not painful or damaging to ears... EDIT: it looked similar to this one: https://www.qbicwashrooms.co.uk/magnum-multidry-hand-dryer-white.html https://www.qbicwashrooms.co.uk/magnum-multidry-hand-dryer-w... Except it had even lower power rating. I don't get why this states "25 seconds". Do people have hands made from sponge?

afandian 7y ago
All I know is that Dyson hand dryers and Animal vacuum cleaners are well above my pain threshold. I think using them regularly certainly would damage my hearing. I actively avoid them. It's down to diversity, I suppose. I'm no super-hearer (I don't really think my hearing is different to anyone else's) but obviously the engineers at Dyson didn't care about people like me. I use another brand of 'blade' type dryers (I forget which) every day and it's fine.
dpark 7y ago
> I don't get why this states "25 seconds". Do people have hands made from sponge? I don’t know why 25 seconds is hard to believe. That’s the manufacturer’s claim. I’d imagine if anything their claim is optimistic and the 60 seconds people claim is more realistic. If you have washed your hands properly, you’ll have several milliliters of water spread across the surface. Slow blowing warm air isn’t going to dry that off in 5 seconds.
- carlmr 7y ago
  There was this TED talk once about shaking your hands twice to only need one towel. I've been doing it ever since and an Airblade will dry my hands in 10 seconds.
  - jack2 7y ago
    Only it was twelve times.
    - carlmr 7y ago
      Thank you, I guess I misremembered. But 2-3 times works for me.
  - Lewton 7y ago
    It's 12 times and leaves quite a mess
    - TeMPOraL 7y ago
      That's what the sink is for.
      - carlmr 7y ago
        Yeah, I apparently misremembered the number (I guess I'm lazy to go for 2-3 usually, but I think it's the 20% effort that gets you 80% there). And I never had a mess cause I do it over the sink.
- TeMPOraL 7y ago
  > I don’t know why 25 seconds is hard to believe. Because it's 2.5 kilowatt blower making 78 dB of noise, according to the technical spec under that link. With these parameters, you should be able to dry your hands in 5 seconds while keeping them a meter away. Like with the one I mentioned seeing in that McDonald's, which was AFAIR rated at something around 1.2 kW (and I remember thinking that's already impressive for a hand dryer). > Slow blowing warm air isn’t going to dry that off in 5 seconds. But fast blowing, slightly less warm air would. I was subtly suggesting that the reason may be what 'carlmr mentioned in a parallel reply - maybe people don't shake off the water after washing their hands, preferring instead to both waste their time at the dryer and add work to the cleaning stuff that now has extra water to mop off the floor?
  - dpark 7y ago
    > Because it's 2.5 kilowatt blower making 78 dB of noise, according to the technical spec under that link. With these parameters, you should be able to dry your hands in 5 seconds while keeping them a meter away. This is a really bizarre statement. You throw some numbers up and then say “obviously it should work how I said”. But it’s not obvious at all. Those numbers don’t intuitively tell me that it should my hands in 5 seconds. Indeed my intuition (and that manufacturer’s specs) says that’s wildly inaccurate. I’m really confused by your “1 meter away” claim. At a meter away you’re basically just waiting for ambient air to dry your hands. The fact that they measure decibels a meter away doesn’t mean that’s where your hands should be.
    - TeMPOraL 7y ago
      My statement is this: I've used a sub-2kW blower that could dry hands in below 10 seconds, was loud but not painful, and if you somehow made it portable, it could double as a leaf blower in a pinch. 1 meter from the nozzle the stream was still powerful enough to dry hands faster than ambient air. So the numbers people throw around this thread are weird, they imply unrealisticly wet hands, or ridiculously inefficient dryers.
      - dpark 7y ago