re. Jill's water heater

Jill wrote:
> I have a hot water heater that is in an outside shed but against my
> bedroom wall.  Even with the fuses switched off, it emits very high
> magnetic fields (measured on my meter).  The elecric doesn't seem to
> be a problem though.
> Wondering if anyone has any suggestions - barriers to use, where to
> get, etc?
>
Shivani replies:
It is extremely difficult to shield magnetic fields.
The real issue is whether the field from this heater contains
symptom-causing high-frequency electrical pollution or not. If it doesn't, then it
will probably not cause you symptoms in the short run.
The long run I am not so sure about. Anyone have info. on research
done on CLEAN (60 Hz only) magnetic fields?  
I do know that when researchers recently went back to the homes that
Wertheimer and Leeper used in their famous study it was found that the
cancer-causing homes all had 180Hz and harmonics. Below is some info. about that, from
my Web site.

Regards,
Shivani

Reported in Shocking News October 26, 2004:

[Indication that it was specifically the high frequencies that created
leukemia in the famous Wertheimer study of 1979: -Shivani]
Electrical engineers and
epidemiologists re-examined the EMF-cancer hypothesis by
measuring the current (amperes) at the utility neutral-to-ground
wire at the transformer or pole near the homes, the amperage on
water lines serving the homes, and the intensity of magnetic
fields in the living areas most occupied by victims who had
lived in the homes. BTD sampled 81 of the 579 cases (cancer)
and control residences that were coded by Wertheimer and
Leeper in 1979 [20] and by Savitz et al. in 1988 [In ref. 11].
In this study 60 Hz, 180 Hz, and harmonic magnetic fields are
associated with wire codes, but only 180 Hz and harmonic
magnetic fields are associated with case/control status; case
being a cancer victim lived at the residence.
The odds ratio (OR) combined across strata (HCC, LCC) for the
180 Hz and the sum of 3 , 5 , and 7th harmonic fields were 4.0 rd th
and 4.3 respectively. Both were significantly elevated above the
null value of 1 (P = 0.0061) for either field components.
The odds ratios indicate cancer deaths were four times
more likely among victims who lived in homes with high
levels of 180Hz current or the 3rd , 5th and 7th harmonics
than among controls with similar socioeconomic backgrounds.
The conclusions reached 25 years earlier [20] were validated, but an
improved measurement instrument with coil censor
signal analyzer (HP Model 3561A) implicated harmonic
currents which earlier test meters did not detect.

180 Hz is a 3rd harmonic frequency that becomes an additive on 3-phase
wiring. This means that once on the wiring it keeps adding its higher harmonics,
up and up into higher frequencies.  



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