The question I'm asked most often
when doing energy-efficient design is
"What's the payback of this energyefficiency
measure?" But since most
homes are financed by long-term
mortgages, I prefer to steer my clients
to the concept of cash flow instead.
Cash-flow analysis looks at how much
money will be spent per year for energy
and on the mortgage. What the
homeowner should be looking for is
positive cash flow from the energy
investments; that is, the value of the
energy savings realized should be
greater than the added cost to the
mortgage payments for implementing
the energy upgrades.
A Package of Upgrades
Not long ago, a young couple I
know were having a starter home built,
a typical story-and-a-half Cape.