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... cost-saving in the long run and fit within a more efficient energy policy that also benefits the environment. Installers of heating and ventilation can also seek our advice on more complex installations. Due to the significant changes in insulation levels and airtightness, as well as the use of heat pumps, the era of rule-of-thumb methods for determining heating capacities is over and, moreover, very unreliable. Therefore, please contact us for a detailed heat loss or cooling load calculation, for both new construction and renovation.