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Jack_in_VA
Premium Member
join:2007-11-26
North, VA

Jack_in_VA to Bob4

Premium Member

to Bob4

Re: Deadly Amoebas Found in Tankless Water Heater

said by Bob4:

I think avoiding exposure to things like Legionnaire's Disease by setting the water heater to 135 F is a valid trade off to the slight risk of being scalded. The single-handle, pressure balanced faucets makes that very unlikely.

No I think you have it backwards. The slight risk of contracting Legionnaires Disease is very slight. The chance of getting scalded is very high.

There is no rational reason to exceed the CDC recommendation of 120 degrees for the the setting.
Bob4
Account deleted
join:2012-07-22
New Jersey

Bob4

Member

said by Jack_in_VA:

There is no rational reason to exceed the CDC recommendation of 120 degrees for the the setting.

Or maybe there is:
said by CDC :
Households with water heater temperatures <=125°F were significantly more likely to harbor nontuberculous mycobacteria (NTM) compared with households with hot water temperatures >=130°F...

Nontuberculous mycobacteria (NTM) are opportunistic pathogens found in the environment (e.g., water and soil) and cause life-threatening infections in humans, other mammals, and birds. The incidence of NTM disease in Canada and the United States seems to be increasing... NTM are not transient contaminants of drinking water distribution systems; rather, the NTM grow and persist in plumbing.
»wwwnc.cdc.gov/eid/articl ··· 1510.pdf

marigolds
Gainfully employed, finally
MVM
join:2002-05-13
Saint Louis, MO

marigolds

MVM

said by Bob4:

said by Jack_in_VA:

There is no rational reason to exceed the CDC recommendation of 120 degrees for the the setting.

Or maybe there is:
said by CDC :
Households with water heater temperatures <=125°F were significantly more likely to harbor nontuberculous mycobacteria (NTM) compared with households with hot water temperatures >=130°F...

NTM disease cases number less than 4,000 per year, and the -vast- majority of those cases are from environmental airborne exposure.
Since, you know, you have to inhale them to contact disease from them. A hotter shower is actually much more dangerous of a risk exposure because of that.