What is the correct temp setting for a hot water boiler

Often HW radiation is sized for 180 degree supply/160 degree return with an (obvious) 170 degree average. This will give you a radiator output of 150 BTUH per SF of EDR in a 70 degree room. If you have a surplus, the maximum temperature you need will go down. 200 degrees is plenty high given our recent warmish weather.

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PTC Heater Elements

PTC heater which have the good characteristics, such as: temperature raising rapidly, safety and reliability and no burning. It is the smart and the electricity saved heat. It is mainly applied for hair curler (crimper),wax melting heater, humidifier, water boiler, liquid warmer, …

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