How many BTU's in each foot of hydronic baseboard?

The BTU output of hydronic baseboard varies depending on factors such as the water temperature and the design of the baseboard. Generally, a standard hydronic baseboard heater can provide approximately 400 to 600 BTUs per foot at a water temperature of 180°F. However, this can be influenced by the specific model and installation conditions, so it's important to consult the manufacturer's specifications for accurate figures.