keldred’s Recent Comments

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  Don't forget solar cooking

  I just got into solar ovens this summer and found that building one not only used up a bunch of scraps in my basement but also was a lot of fun.  

  Then I brought my oven to work and a couple of my coworkers got excited about it too.  Now every sunny day is a solar cookoff.  Here is a link that offers a bunch of really good designs http://www.solarcooking.org/plans/

  Not only do we not use the microwave much anymore, but the food tastes much better.  Unfortunately the good solar cooking season in western Washington is about over, though now I have one more thing to look forward too next summer.On Solar thermal power deserves more attention, due to its lower cost and relative ease of storage posted 2 years, 2 months ago 35 Responses

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  ceramic filters & chemical

  Ceramic filters work great for removing large impurities like cryptosporidium, but they do nothing for water-borne viruses.  Using silver with ceramics does work, but requires upwards of 800 minutes of contact time to effectively kill viruses.  As far as arsenic, ceramic filters do not give much if any protection.  For adequate removal of arsenic you would need a reverse osmosis or ion exchange system.On Umbra on water filters posted 2 years, 4 months ago 10 Responses