Hi Diane, Do you have a reference for solving for the solar calculation s? On Tue, Nov 2, 2021, 6:10 PM Diane Whitehead via pbs < pbs@lists.pacificbulbsociety.net> wrote: > I found the name of the book - Solviva, by Anna Edey. > > She ran a large greenhouse, partly heated by the sun and partly by > chickens living in it. (She tried to get her sheep to stay inside too > but they preferred the cold outdoors.) She was even growing enough > tomatoes to sell in midwinter. > > Then I started to think more about it. I used to keep chickens and > I'd have an allergic reaction whenever I cleaned out the coop. Not > a good idea to fill my greenhouse with feathers and dust. > > And the solar heat. Right! Before I designed my house back in the > 60s, I read all about that. I faced all the windows south, expecting > solar gain. My calculations did not take into account how high all > those conifers were and how low the winter sun's trajectory is. Or > our maritime cloudiness. > > On the few winter days when we actually had sun, I would have it > for about an hour when it managed to shine from the unobscured > sky above the road. > > So I get NO solar warmth, but the infrequent winter sun is cheering. > > Diane > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… > Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>