Within Sustainable is an order of operations; lessify, maximize, and neutralize.
Lessify order of operations yields the biggest return of investment. Bundling up, adding blankets, chalking, adjusting thermostat, and building smaller are the prime areas.
Maximize is the next order of operations and costs more to implement and yields less on investment. Upgrading the heating and cooling plants, engineering the homes, and air exchangers are examples.
Neutralize is the final and most expensive step in the order of operations and yields the lowest returns on investment. Solar power, wind power, solar heat are used here.
Learn this and more at the Tiny Green Cabin Workshop July 7th and 8th.