Since those moorings were installed in 2004, they have seen the Atlantic current wobble and weaken by as much as 30percentturninging down the dial on a dramatic heat pump that transports warmth toward northern Europe.
In winter, the energy from the rocks can be used as a source of heat for campus buildings, as water from deep wells brings warmth up to heat pumps at the surface.
Like Mr. Bach they use a heat pump to draw warmth from the ground to heat their rooms.
The technologies eligible for the payments include biomass boilers, solar thermal systems that provide hot water, ground source heat pumps which draw heat from warmth underground and air source heat pumps which extract heat from the air outside a home.
Qualifying technologies include biomass boilers that burn wood, wood chips or pellets; roof-mounted solar thermal systems that only provide hot water; and ground or air-source heat pumps which draw heat from warmth underground or from the air.
He hopes to eventually fit air source heat pumps - which extract warmth from outdoor air and transfer it indoors for heating - and solar hot water systems in customers' homes.
The Aspirant Dunand pool in the 14th arrondissement is the latest in a series of French public buildings to use heat pumps to recycle residual warmth from showers, dishwashers and washing machines in its sewers.
The Chayets have put $88,000 into energy-saving windows and $100,000 into a heat pump that feeds off warmth in the ground.
He says he did most of the work rebuilding the schoolhouse where they now live, installing a special wood-burning oven to heat the downstairs and laying 1,300 feet of pipe in a field behind the house to pump warmth from the ground to heat the rest of the house.
Another option for efficient warmth is called a ground-source heat pump, which, Mr. Peterson said, "is nothing more than an air-conditioning unit that runs in reverse to produce heat, and runs the process the other way to produce A.C".
