BS EN 12977-5:2018 Thermal solar systems and components. Custom built systems Performance test methods for control equipment

Heat exchangers
Performance testing
Solar power
Pressure regulators
Controllers
Control devices
Heating equipment
Flow regulators
Probes
Actuators
Solar heating
Thermostats
Space-heating systems
Air heaters
Temperature controllers
Control equipment

Link: BS EN 12977-5:2018 Thermal solar systems and components. Custom built systems Performance test methods for control equipment
Source: BSI Standards