The lowest temperature in Xinxiang in winter is minus 7 or 8 degrees Celsius, the energy-saving effect of air source is not very obvious, with solar energy may be better. The sunshine conditions in Xinxiang are still quite good.
Of course, the air source heat pump is also very energy efficient, if the floor is not suitable for installing solar energy on the installation of air source, if you can install solar energy, or recommended to install solar energy.
From the comfort of water, air source is not so much cold water and, water pressure and tap water, water comfort will be higher.
If you install solar energy and find that the pressure of hot and cold water is not balanced, you can use a non-electric pressurized mixing valve, and the water comfort is the same as air source.