VEVOR 14,000 BTU Portable Air Conditioners, 4-in-1 Portable Unit with Remote Control, for 550-700 Sq.Ft, Heating/AC/Dehumidifier/Fan Mode &Low Noise & Rich Accessories for Home/Office/Dorms, White
There is no way it will only heat when the outside temp is above 50°f. It should allow down to at least 32°f outside. Those numbers sound like inside temp heating range. What is the actual outside temperature range it can still provide heat? No sense in having a heat pump mode at all if it can't do at least freezing temps.
The applicable ambient temperature range for heating mode is 10-25℃ (50-77℉). When the ambient temperature exceeds this range, the heating mode may not work properly. Please refer to the user manual for relevant instructions.
The applicable temperature range of our product heating function is 10-25°C, and 14000BTU is generally suitable for 550-700sq. ft, the heating capacity will be slightly worse than the cooling capacity.