[Greenbuilding] suspended slab

[Speireag Alden]

Sgrìobh Lance Collins:

>Here in southern Australia (a mild climate) we have regular problems 
>with people being infected due to the mist from infected 
>air-conditioning cooling towers drifting into the street.   I would 
>worry about showering in water that had sat for long periods above 
>20C below 55C as inhaling legionella seems to be the principal 
>infection path.  (These temps from from flaky memory).

     I did some research on this a few years back, and you can easily 
find the old discussions on various lists by searching on "Speireag" 
and "Legionella".  These temps I culled, if I recall correctly, from 
an Australian guideline for correct treatment of hot water in 
hospitals.

     I have put centigrade first, and left in the Fahrenheit for those 
among us who have been traumatized by US perversity.

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Below 20°C (68°F), Legionellae can survive but are dormant.  Cold 
water in storage tanks, piping, decorative fountains, and other 
equipment should ideally be kept below 20°C.

Ideal growth range 35°-46°C (95°-115°F).

Legionellae growth range 20°-50°C (68°-122°F).

Above 50°C (122°F) Legionellae can survive but do not multiply.

55°C (131°F) Legionellae die within 5-6 hours.

60°C (140°F) Legionellae die within 32 minutes.

66° (151°F) Legionellae die within 2 minutes.

Rapid kill range 70°-80° (158-176°F)
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-- 
Leaves starting to turn
Anticipation shivers
Me as winter comes

-Speireag.