http://www.youtube.com/watch?v=s1C_CG-tipMMartin is back from his short little trip ( only went one twentieth of the diameter of the earth or so) and discusses his trip and the sights there.
Also discusses lighting and his intentions to do solar power. Of course Batteries are discussed, along with his continued testing of them.
Then an interesting aside into air quality, with a show and tell of the air filter he bought for his lab, and how effective it has been. Less dusting is good
A thought to all the viewers out there, when was the last time you took the filter for your air conditioner out and cleaned it, along with the coil? Many do not ever clean it, or even know there is a filter in there. In the USA if you have a central heating and aircon system you will probably also have a HEPA filter as part of the system, and this filter should be changed as part of the annual maintenance of the system. You do find that many filters have never been changed since the system was new, or have been removed and not replaced. Some even get installed with the plastic covering still in place, and the homeowner wonders then why it does not work well.
