tag:blogger.com,1999:blog-4343602688372362140.post8235105587688163324..comments2014-02-17T08:29:35.405-08:00Comments on The Urban Greenhouse: Anonymoushttp://www.blogger.com/profile/10508849802763882146noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4343602688372362140.post-78351105858976981892011-08-29T04:13:32.243-07:002011-08-29T04:13:32.243-07:00The prototype cost about AU$30 in total, and a ful...The prototype cost about AU$30 in total, and a full system wouldn't be much more, if any. With a simple wind turbine made from an old bike and some pvc pipe there would be no running costs. I had the prototype plugged into the wall and figured it was drawing about 80 cents of electricity a day.<br />Passive solar heating is simple enough, like you say, but passive cooling is quite a bit trickier. Please let me know if you have any links on this, I'm always on the lookout for new tech.Anonymoushttps://www.blogger.com/profile/10508849802763882146noreply@blogger.comtag:blogger.com,1999:blog-4343602688372362140.post-8958295035284262792011-08-28T08:58:09.261-07:002011-08-28T08:58:09.261-07:00Your system will work, but it will be expensive co...Your system will work, but it will be expensive compared with other alternatives. There has been a lot published on "passive" solar design, and I think you will find that a passive system will work well for a greenhouse and be cheaper than the "active" system that you are showing.Anonymoushttps://www.blogger.com/profile/05529421444706649920noreply@blogger.com