Surplus heat from industry needn't go to waste

March 4, 2019

Excess heat from ROCKWOOL’s factory in Doense, Denmark provides heat to 750 nearby homes via the municipal heating system. With effective policies, municipalities could capture more than 100 times that from industry, writes Danish newspaper Politiken.

In its Sunday edition, Politiken newspaper writes about the huge potential in annual savings (1.6 billion DKK and 300,000 tons of CO2) from capturing surplus heat from Denmark’s industry—but only if the right policies are in place to make it feasible.  

As an example, the story cites ROCKWOOL’s Doense factory near Hobro, Denmark, which currently provides surplus heat for 750 homes via the municipal heating system. 

“After an extension of the factory, it will be able to deliver three times as much. But this presupposes that the tax on surplus heat does not change in the way that the Ministry of Taxation has proposed,” the newspaper writes. 

The current proposal from the Ministry of Taxation would create a payback period of at 8-10 years, which is too long to justify the mulit-million dollar investment needed, Klaus Hovmøller, Production Director for ROCKWOOL Nordics, tells Politiken.