Heat pumps
We use them here in Virginia, but what we use are the kind that work on air rather than the buried coil type. Very efficient in temperatures above freezing, but not good when it gets much colder than that.

The buried coil type is a large initial investment, but is extremely efficient- especially if the water table is only a few feet down.

I'd really like to see ocean currents tapped for power rather than tides- we have them well mapped out, and could put something similar to a large wind turbine a couple hundred feet below the surface and it would never bother anyone. Just run the power cables back to the shore. Yet is this being investigated?

*crickets*

Yeah.
( The Resident Loon Not a demographic. Do not measure., Tue 8 Jul 2008, 16:34, Reply)