Wall-hung boilers cannot be used in conjunction with solar energy.
Wall-hung boiler is actually the abbreviation of gas wall-hung boiler. The term "wall-hung boiler" is a foreign term, and its full name is: "gas wall-hung heating boiler".
The national standard is called: "Gas wall-mounted rapid heating water heater", but it is not a gas water heater in the traditional sense and is essentially different from a water heater. It has various safety protection measures such as anti-freeze protection, anti-dry burning protection, accidental flameout protection, over-temperature protection, and water pump anti-seizing protection. An external indoor thermostat can be connected to achieve personalized temperature adjustment and energy saving. According to statistics, using an indoor temperature controller can save 20 to 28% of gas costs. The new national standard GB25034-2010 for gas heating water heaters will be implemented from July 1, 2011.