Danish Energy Association, whose member companies sell and provide advice on heat pumps, is not surprised at the positive reaction of householders.
"The Danish Energy Agency's report clearly shows why a heat pump is a real alternative when householders are faced with replacing their old oil-fired heating system. Heat pumps provide the necessary savings on the household budget and are simple to shift over to," says Richard Schalburg, a consultant at the Danish Energy Association.
The savings that can be realised with heat pumps, compared to oil-fired, gas-fired, coal-fired or electrical heating systems, have a thermodynamic explanation. With the latter systems, one joule of supplied energy produces one joule of useful heat – a one-to-one ratio. But with a heat pump, one joule of supplied energy can produce a lot more than one joule of useful heat, by moving existing heat from a cooler temperature (the air or the ground) to a higher temperature (the dwelling space). The usual ratio for heat pumps approaches four-to-one.
Today there are around 40,000 heat pumps installed in Denmark, which are either of the air source or ground source types.



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