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Defro and many others
in parallel or with the triVAI parameter in the hybrid system
According to the product documentation
the LOGO PWM solar controller is a universally applicable and energy-efficient solution for controlling solar and heating systems
Viadrus U22 Schamottstein oben vorne Wita Defro and many othersViadrus U22 fireclay brick top front Viadrus fireclay brick top front Compatible with the cast iron boiler: Viadrus U22 Why does fireclay break down over time? Due to the large proportion of mineral substances, fireclay also has a small disadvantage: it is relatively brittle. Due to continuous high heat exposure, it eventually develops cracks. These are the first signs of material stress, but not yet a reason for replacement. The replacement of
