As a Green Building practice, insulating is key. Wherever possible, target R-60 insulation for ceilings / attics (about R-50 for cathedral ceilings). Floors over crawl spaces or concrete slabs and all exterior walls should target R-30. Equally important is the use of a good vapor barrier for ceilings walls & floors. See the new article on R-values on the SMVHOA website under Reference.
To insolate means to collect as much sunlight in the house as is practical, with overhangs or sunshades effectively shading windows in summer but allowing sunshine through during winter. Active collection of solar thermal heat (with any of the many collector types available) allows heat to be stored in practical storage media and distributed to living spaces as needed. As technology improves, there are ever-growing, practical uses of solar photovoltaic (PV) power; the best uses are water pumping, air blowing, battery charging and similar applications requiring very little battery installation.
Isolation is the third key word in this quarter’s Green Patch. Homeowners should keep unused spaces at lower temperatures for better ecology and economy. Where feasible throughout the home, window shades or curtains should close at night, open during sunshine.