Paging the Scientisti / HEPA filterati

How big is .3 microns?

I usually leave one of my windows wide open to let the fag smoke out but
the outside temperature is preventing me from doing this now.

I've seen an air purifier that gets rid of stuff up to as small as .3 of
a micron but how small is that?

 

One millionth of a meter = one thousandth of a millimetre.

Pretty small.

 

A human hair is about 100 microns thick (but it depends).

 

What sir wants is something like an extractor fan, but with a heat
exchanger in it.

 

Indeed, or an electro-static air cleaner

--
Dan L (Oldbloke)
My bike 1996 Kawasaki ZR1100 Zephyr
M'boy's bike 2003 Honda NSR125R
Spare Bike 1990 Suzuki TS50X
BOTAFOT #140, DIAABTCOD #26, BOMB#18 (slow)

 

Like the tractor pulling people do.

 

Muck wrote:

Erm, no, sorry.

No idea what you mean.

You'll have to explain

--
Dan L (Oldbloke)
My bike 1996 Kawasaki ZR1100 Zephyr
M'boy's bike 2003 Honda NSR125R
Spare Bike 1990 Suzuki TS50X
BOTAFOT #140, DIAABTCOD #26, BOMB#18 (slow)

 

The people that do tractor pulling as a sport, some of their tractors
have electro-static air filters on them. The bloke that was commentating
told me so.

 

I've been googling and apparently, those electrostatic filters can take
out stuff as small as 0.1 micron, like smoke and pollen.

If you've won the lottery, you can get one of these;

http://makeashorterlink.com/?R4491260A

but I wouldn't think it's exactly hard to build a small unit for just
such purpose.

 

How very odd. I can't see why they'd want to use electro static.

You normally see them in pubs and clubs.

--
Dan L (Oldbloke)
My bike 1996 Kawasaki ZR1100 Zephyr
M'boy's bike 2003 Honda NSR125R
Spare Bike 1990 Suzuki TS50X
BOTAFOT #140, DIAABTCOD #26, BOMB#18 (slow)

 

Maybe the pressure drop across the filter is less than a conventional
one. That would be the only reason to use one in racing.

 

0.0000003m

or

0.00003 cm

or

0.003 mm

I think

its 3 times 10 to the minus 7

If the purifier is HEPA filtered it will remove the smoke.

The production labs in my place of work are HEPA filtered to 99.9998
percent and they use smoke upstream of them to test if they are leaking.

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

I had one of those, poshly known as an ioniser.

I'd prefer to dust less often. Ta.

 

I've googled as well and apparently .3 is better than .1 as .3 is the
hardest to catch and is the optimal size for getting into the repertory
system. They get better with age as well, apparently: Just like a K+N
;o)

 

Not a wuss, but it is getting expensive

Thanks. This is what I wanted to know. When there's bright sunlight
coming through the window, I can see the individual particles of smoke
so it's entirely possible these will be caught.

Will the catch bacteria as well then?

 

What you can see on a bright day are particles of soot and ash not smoke.

This should make it all clear

http://www.lakeair.com/particle.html

not if the bugger in the lab is sneezing and shedding skin.

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

Erm, same principle, slightly different animal


--
Dan L (Oldbloke)
My bike 1996 Kawasaki ZR1100 Zephyr
M'boy's bike 2003 Honda NSR125R
Spare Bike 1990 Suzuki TS50X
BOTAFOT #140, DIAABTCOD #26, BOMB#18 (slow)

 

Crikey, what an eye opener!

I think a filter is coming on.

Ewww. It's all round my home as well.

 

It doesn't bare thinking about. Just remember that chickens raised in a
sterile environment die easier as their immune system is not developed
and they don't have the correct gut fauna.

--
Martin:
"For a minute there, you bored me to death."
VTR1000 Firestorm
TDR250 http://ukrm.net/BIKES/Yamaha/tdr250.html
martin dot smith nine zero three at ntlworld dot com

 

So could I save a bundle and rub a few balloons on my jumper and stick
them on the wall?