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Takagi 100074352 Surge Box/Surge Protector Kit for Tankless Water Heaters All Brands_Luma Surveillance The Siemens QJ23B225H is aProtect your tankless water heater from electrical surges with the Takagi 100074352 Surge Box. This dedicated surge protector kit is engineered to safeguard your water heater's sensitive electronics from voltage spikes and power fluctuations. Designed specifically for Takagi tankless systems, it provides reliable defense against damage that could lead to costly repairs or replacement. Easy installation and dependable performance make this an essential