A “hybrid” put on the market consisting of two or more technologies integrated in one casing would be considered a single “product”. A hybrid consisting of a heat pump and a gas boiler is to be considered a heat pump as boiler space heaters are defined as space heaters that generate heat using the combustion of fuel and / or the Joule effect.
In the absence of a calculation methodology for heat pumps integrating a fossil fuel supplementary heater, suppliers can use the same methodology proposed by EN 14825 for electrical supplementary heaters by replacing performances of electrical supplementary heater with the performances of fossil fuel 33 supplementary heater. It is up to the standardisation process to develop specific standards for these hybrid products.
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