Thread: Health effects on seniors from short term exposure to fine dust.

Originally Posted by Colin62

Part of me wishes I hadn’t read this thread - I can see that it’s going to cost me some more money in the short to medium term.

Tell me about it. So far I've constructed a 3x3 purpose built shed, bought the best dusty available, spent a small fortune on PVC pipes and fittings, redesigned the layout of my equipment for the most efficient airflow and am now preparing to install it all. I daren't add up the cost but it must be approaching $7k. Maybe I should start a thread...

mick

At 6AM today north of Brisbane. AQI was extremely bad due to bushfires yesterday and overnight, I still went for my morning walk but had a basic smoke mask on.

CF=1 ug/m3

PM1 120
PM2.5 170
PM10 174

A few hours later in my AirCon closed workshop and similar in the house:

PM1 = 60
PM2.5 = 88
PM10 = 92

AQI index for PM2.5 = 167 - Unhealthy.

Unless you are turning or sanding 40 hours a week there's no need to spend $7k on fine dust control in a 3 x 3 m shed.
For the average weekend warrior a modified 2HP DC located outside the shed, or sealed inside an enclosure and vented outside the shed , 6" ducting, modified machinery, and a couple of exhausting fans would be more than enough.

Current home office PM2.5 and PM10 are <3 µg/m³

Originally Posted by BobL

Unless you are turning or sanding 40 hours a week there's no need to spend $7k on fine dust control in a 3 x 3 m shed.

I think you misunderstand Bob. The 3m x 3m shed is to house the dusty.

Originally Posted by NCArcher

I think you misunderstand Bob. The 3m x 3m shed is to house the dusty.

OK but then one might ask why so big?

One would need to ask Mick that but I assume there is a compressor in there and I think a steam generator.

Originally Posted by NCArcher

One would need to ask Mick that but I assume there is a compressor in there and I think a steam generator.

Well in that case the value of the 3x3m shed needs to split into ~3.

Thanks for clarifying NC. The 3x3 shed would not exist if I hadn't proceeded with the ClearVue and fixed pipes. Having been made aware of the noise generated, I built the small shed 300mm off the rear wall of my main workshop. The space between the studs will be filled with pink batts and the walls lined with AngelStep 484 acoustic insulating sheets after the pipes and wiring have been completed.

The siting of the steam generator made sense as an after thought. It's right next to the water tank and well away from my tools. The dusty itself was about $3800, pipes, flexi, fittings and purlin about $1000, electrical circuits and moving lights say $400, VFD $300?, plus the shed and pad about $1500 less whatever notional cost I put on the steamer. I do have a compressor but never use it for woodwork.

I'm sure it can be done for less cost but I don't begrudge the expense and think the final result will be well worth it.

mick

A quick update on the costs so far. I just bought 10m of transparent 150mm PU Flex pipe with copper reinforcing and 5m of 100mm. The price? $1250 before I was offered a 30% discount. The supplier was Ezi Duct in Sydney. I know I could've taken the cheaper PVC option but I didn't. I've generally found quality items prove to be more economical in the longer term.

mick

Originally Posted by Glider

A quick update on the costs so far. I just bought 10m of transparent 150mm PU Flex pipe with copper reinforcing and 5m of 100mm. The price? $1250 before I was offered a 30% discount. The supplier was Ezi Duct in Sydney. I know I could've taken the cheaper PVC option but I didn't. I've generally found quality items prove to be more economical in the longer term.

mick

If it was the super flexible PU then it performs poorer than the stiffer PVC or even stiffer HDPE. The stiff 150mm PVC is about $30 a metre.

Originally Posted by BobL

If it was the super flexible PU then it performs poorer than the stiffer PVC or even stiffer HDPE. The stiff 150mm PVC is about $30 a metre.

I am sure the CV Max being installed has enough grunt to overcome the poorer flow qualities when running at 65hz. If it was a 3hp Asian DE @ 50hz I would totally agree.

Originally Posted by Chris Parks

I am sure the CV Max being installed has enough grunt to overcome the poorer flow qualities when running at 65hz. If it was a 3hp Asian DE @ 50hz I would totally agree.

Actually its the other way around.
Whatever flow a DC/duct/flexy combo has with any flexible PU hose it always generates greater flow with stiffer hose.
The stiffer the better, with the ultimate stiff hose being a solid duct,

The more pressure the DC can generate the more significant the difference in flow.
Going to the other extreme, the flow generated by 2HP DC using 100mm hose won't make much difference whether it's using stiff or soft hose.

There are reasons for using highly flexible hose but if you want max flow performance then the stiffer hose wins every time.

Just for costings -
Home oxygen concentrator $1500
Portable oxygen concentrator $4900
External charger $330

Living the remaining bit of your life at the end of a 10m oxygen hose - Priceless

Originally Posted by BobL

There are reasons for using highly flexible hose but if you want max flow performance then the stiffer hose wins every time.

I would never have guessed that.