[TowerTalk] FW: Fwd: Fwd: Fwd: Antenna near chimney - bad idea?

[Roger (K8RI) on TT]

Coal, Wood and fuel oil contain various percentages of sulfur and likely 
other acid forming elements.  The artificial logs contain chemicals to 
get the colored flames. Those compounds may not be listed, but if there 
is a chemical in there it has to be listed and available on a "Required" 
Material Safety Data Sheet (MSDS) .  A search might even tell what 
chemicals are commonly used.

I think you will find that chimneys used for coal or wood burners may 
out gas for several years after the last fire went out.

Coal would normally be considered the worst with the softer coal often 
having more pollutants, but those vary widely with location.  The 
Saginaw Valley (MI) has a huge underlying coal deposit (search on 
Saginaw Valley MI coal) in a 20 to 30 mile area the content  of the coal 
varied widely.

Natural gas and LP gas are the cleanest with the furnace exhaust stacks 
no more than PVC pipe with a small pump and water trap at the bottom of 
the stack. The moisture in those stacks condenses within a few feet of 
the newer high efficiency furnace and never makes it out.  Ours is 
nearly 30 years old and and was advertized at about 95% efficient. The 
exhaust is mainly CO2 and H2O, which makes carbonic acid that exhausts a 
few feet above ground level while the condensate goes down the drain.

73

Roger (K8RI)



On 7/1/2015 11:27 PM, Matt wrote:
> Spot on Hans - flue gasses can be quite acidic!  Especially as the moisture
> content in the flue gas starts to condense at ambient temperature (dew point
> of most flue gas is well above ambient temperatures)
>
> Matt
> KM5VI
<a whole lotta snip>

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