EcoHeat Pump F3P (R290) Model Announced. NORD HT has launched production of its new propane-operated heat pump series, the NORD HT EcoHeat F3P, with market release expected in Germany and across the EU by August 2025. The new monobloc heat pump is designed for a wide range of applications up to 20 kW and is capable of reaching higher temperatures, making it suitable for buildings with existing radiator systems.