Posted on March 30, 2015 by Scott Gibson
Nik Fiorito is grappling with the same issues every owner/builder eventually confronts: What's the best way of insulating a new house? Only in Fiorito's case, it gets a little more complicated.
First, he's building in Climate Zone 7, forty minutes north of the U.S.-Canadian border, on a hilltop where the temperature averaged 3 below zero F (-19.6 degrees C.) this past February. He's also considering a fully off-grid photovoltaic(PV) Generation of electricity directly from sunlight. A photovoltaic cell has no moving parts; electrons are energized by sunlight and result in current flow. (PVPhotovoltaics. Generation of electricity directly from sunlight. A photovoltaic (PV) cell has no moving parts; electrons are energized by sunlight and result in current flow.) system plus a ground-source heat pumpHome heating and cooling system that relies on the mass of the earth as the heat source and heat sink. Temperatures underground are relatively constant. Using a ground-source heat pump, heat from fluid circulated through an underground loop is transferred to and/or from the home through a heat exchanger. The energy performance of ground-source heat pumps is usually better than that of air-source heat pumps; ground-source heat pumps also perform better over a wider range of above-ground temperatures. for both heat and domestic hot water.