‘The conditions for the prototypes are that they have to deliver 100 per cent heating capacity without the use of extra heating sources and high efficiencies at 5° fahrenheit (-15° celsius)…Bosch, Daikin, Midea, and Johnson Controls join Lennox International, Carrier, Trane Technologies, and Rheem in the next phase of the challenge…Bosch says it can keep operating in temperatures down to -15°C and still function at -25°C’


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