[Jewelry making - Article 00288] - Re: [Orchid] HEPA Air Filtration for Soldering

[James Binnion]

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    With no disrespect for Brad Simon who wrote the article about
    ventilation you refer to, anyone who says a air purifier system is
    cheaper to install and operate has probably not worked out all the
    numbers. They can work but you need to know exactly what the
    contaminants you need to filter are and how much of them you are
    generating. Then you need to talk to a ventilation engineer to find
    out what size system you need. Then purchase the system, install it.
    Then you need to look at the filter replacement costs because you
    will have to replace the HEPA filters, pre-filters and charcoal
    filters on a regular basis. How often will be something you and the
    engineer will have to discuss because there is no easy way to
    determine when the charcoal canister needs replacing. If you wait
    till you can smell the contaminants in the exhaust air you have been
    breathing the contaminant for quite a while, and some of them have
    no odor. Also some contaminants cannot be filtered out.  HEPA
    filters remove particles (small solids), Charcoal filters can remove
    some chemical vapors but not all of them. Carbon monoxide which is
    generated by torch flames cannot be removed with a passive system
    (filters) it requires a catalytic converter or some other means of
    transforming it into a less harmful gas (a catalytic converter will
    turn it into Carbon Dioxide) . So Before you try to do this talk to
    a ventilation engineer. With the cost for the engineering and the
    ongoing costs of filters (neither HEPA or charcoal filters are
    cheap) I just don.t see how this is a more economical option. You
    may be forced to do this by regulations of your HOA but if it were
    me I would find a home in an area that does not have a HOA if this
    studio is to be a part of your lively hood the HOA's have very broad
    powers to tell you what you can and can't do in your own home and
    could very easily decide you can't run a business out of your home. 

Jim


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