Wednesday 29 May 2013 19.01 EDT. The war in Afghanistan has cost Britain at least Â£37bn and the figure will rise to a sum equivalent to more than Â£2,000 for every taxpaying household, according to a devastating critique of the UK's role in the conflict. Since 2006, on a conservative estimate, it has cost Â£15m a day to maintain Britain's military presence in Helmand province.
1 B. Ducted heat pumps have an outdoor unit connected to a buildingâs ductwork. 2  Like ductless heat pumps, ducted heat pumps can both heat and cool buildings. 3  Ground-source heat pumps or âgeothermalâ heat pumps draw heat from the soil or groundwater and transfer it to a ducted air distribution system or radiators. Low-cost heat â The cost of heating with a heat pump is similar to heating with natural gas or wood. 2  This is typically half the cost of heating with oil, kerosene, electric baseboard or propane. 3  Click here to compare heating costs of different heating systems.
Geothermal heat pumps can tap into this resource to heat and cool buildings. A geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building. In the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system. In the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger.