View Full Version : Legionnaire's disease
Is Legionnaire's disease a not considered to be an example of a building-related illness (BRI).?
It could be! But not very often
12-01-2005, 03:16 PM
I've had legionnaire's disease. It is basically a strain of pneumonia. If pneumonia can be concidered a BRI, then I guess it would. But like noted above, not likely.
12-02-2005, 10:28 AM
For the best read on Legionnaires disease, see what our government has produced at the CDC at the following link:
There's a lot there.
Legionnaires Disease is a bacteria that requires warm water to thrive. The bacteria is carried in water droplets in the air. Our buildings have water and are kept warm for comfort, so many of the outbreaks reported happen indoors where there is water, warmth and higher concentrations of the bacteria than in nature--where wind, heat and cold dissipate the bacteria.
This is the first time I've heard of the term Building Related Illnesses. So again, I went to the government to see what is up with this and found an EPA site that defined BRI
"The term "sick building syndrome" (SBS) is used to describe situations in which building occupants experience acute health and comfort effects that appear to be linked to time spent in a building, but no specific illness or cause can be identified. The complaints may be localized in a particular room or zone, or may be widespread throughout the building. In contrast, the term "building related illness" (BRI) is used when symptoms of diagnosable illness are identified and can be attributed directly to airborne building contaminants."
In my read, Legionnaire's Disease is a BRI becuase it is airborne indoors and is identifiable.
12-04-2005, 09:13 AM
probably most of the 10000 deaths/year are caused by hot water heaters run at less than 140F, & those people were infected while bathing!
Enlightenment!! The water heater has nothing to do with it!! It is the water standing in shower heads, Eye wash stations, Chemical showers for long periods of time.
01-04-2006, 05:21 PM
Legionella is a common bacteria. The 16 recent deaths in a nursing home in Canada were attributed to it, and it isn't to be taken lightly. If you look at the history of when the disease was named, and some of the medical forums, you'll see that warm, humid environments can increase the chance of its growth. That increases the exposure of occupants, especially if it is being spread through a building's ducting. How do you stop it from growing in ducts? RCI Cell system technology research released by Kansas State University indicates that this proprietary photocatalytic oxidation system will kill up to 99.9% when the surfaces are exposed to the advanced oxidation process (AOP) gases created and distributed inside the ducts and the facility. I haven't seen any other studies that offer this relatively simple and easy way to combat this microbial. Of course, you want to have a variable speed fan control on your main blower that ramps up and down to achieve full energy efficiency while keeping fresh air flowing throughout the facility. You might look at http://www.hoffmancontrols.com as one option.
02-05-2006, 09:07 AM
the bacteria grow in warm water, wherever -- HWH, shower heads, cooling towers, hot tubs, vegetable misters, etc -- ~68- 122F --
water at 140F will prevent growth -- water above 158F will kill the bacteria even in the pipes when they are flushed for 20+ minutes -- PROVIDED the pipes are not scaled --
per discussion in Consulting-SpecifyingEngineer, Jan06, starting page 29.
"Legionella is ubiquitous in groundwater sources."
I'm working on a project for school, - What measures should the HVAC technician take to prevent possible system contamination? Can anyone help me out with this question?
04-16-2006, 06:44 PM
read info at
do a Google search
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