In recent years, driven by the coal transformation into clean energy heating in the north, air energy heat pumps have become hot selling products. Because of its obvious effect of environmental protection and energy saving, high comfort, environmental pollution, won the government at all levels to vigorously develop the premise, but also won the majority of customers. Naturally, there are many customers often want to ask, which brand of air can save electricity? In fact, for residents in northern regions where the temperature is relatively low, it is best to choose to focus on frequency conversion air energy brand.