W QH Oleak = K (TH-TL) HP 0 A heat pump has a COP Hp = 0.4 COP PHP, Carnot and maintains a house at T = 20 C, while it leaks energy out as = KTH - TL) [kW] where K = 0.8 . For a maximum of W = 0.7 kW power input, find the minimum outside temperature, TL for which the heat pump is a sufficient heat source. (25 Outside temperature (°C) =?