Given the media intensity given to the Covid 19 (otherwise known as Corona or Wuhan) virus, there seems no reason to have posts on that very specific subject in several forums Accordingly, all of those posts will be moved to "Headlines". All new items on that subject should be posted there as well. This notice will expire on 30 June or be extended if needed.
Build Your Own Solar Water Heater 1980
An In Depth Book Covering Theory And Design Of Multiple Solar Water Heating Designs