The first line of defense in energy
savings is in the house’s design, construction, and insulation.
The designer of the home explains it this way:
All of
natures, creatures instinctively rely on the round shape for
warmer shelter. A bird's egg, its nest, a rabbit den - all are
proof that it takes less wall area to enclose an equally sized
round, than a square or rectangular space. As such, a round
house uses at least 30% less outer wall area than an
identically-sized conventional house. Incorporating our
energy-conserving layouts and passive solar features, the highly
energy-efficient, clad Pella™ wood windows and our unique
construction techniques of interlocking components make our
structure a super-efficient, airtight home; achieving energy
savings of up to 50% over conventionally built homes. Our
components are designed for insulation factors of R-22 in the
floor, R-22 in the walls and R-36 in the roof.
Not only is the design right, additional steps have been taken
to make the house even more energy efficient. For example, the
external cedar siding was added as additional protection as well
as a cost/labor saving feature and ¾ of the internal walls are
covered with an insulating, acoustical wall covering.
Power and Utilities
This energy-efficient,
environmentally-friendly house runs on passive solar, electric,
propane gas and generated power.
The house was constructed in
1990 as an “all electric” home and still has the wiring and
capability to be all electric if it is desired. In 1997, the
electric dryer, water heater, and range/oven were replaced with
propane gas appliances. Also,
two propane gas-powered alternate sources of heat were added at
that time. Gas appliances are known to last a great deal longer
than electric ones.
In 2004, a $7,500 SPV-80
Gillette Standby Generator operated with propane gas was
installed. This generator operates with the flick of a switch
and creates enough electrical power during an outage to light
every room and run most of the appliances except the heat pump.
The house is located on the
community’s sewer system so there’s no septic system to maintain
or worry about. Water is supplied by the Captain’s Cove Utility
Company.
Appliances
High energy usage and cost can be
greatly reduced by not only design, construction, and insulation
but also by the choice and selective use of appliances.
The house had new XL-13
Trane Weathertron Heat Pump installed in 2005. It can be
used for 100% of the heating and cooling needs of the house;
however for maximum energy efficiency it is used for cooling and
as a heating supplement. Because of the passive solar design and
insulation, heat is seldom called for until after the sun goes
down, even on cold days. Use of the propane gas wall heater on
the first floor and stove/fireplace on the second floor plus
ceiling fans also can reduce heat pump use in the colder months.
Heat pumps provide very cost effective cooling but in this home
it is only used occasionally because of its waterfront location
that takes advantage of the ocean breezes, shading from the
passive solar design, and elevation of the house.
A
Whirlpool washing machine was installed in 1997. In 2005 a
new Energy-star
Amana bottom freezer refrigerator was installed.