There are several ways to improve the efficiency of a hydronic heating system:

1) Upgrade the boiler

Installing a newer, more efficient boiler can significantly improve the efficiency of a hydronic system. Newer boilers have better energy efficiency and can produce hot water at lower temperatures, which can reduce energy consumption and lower utility bills.

2) Insulate pipes and components

Proper insulation of pipes, boilers, and other components of the hydronic system can prevent heat loss and improve efficiency.

3) Optimize water temperature: Adjusting the water temperature to match the heating demand can help optimize the efficiency of the system. If the water temperature is too high, it can lead to unnecessary energy consumption and higher utility bills.

4) Install thermostatic radiator valves (TRVs)

TRVs can help optimize the heating system by regulating the flow of hot water to individual radiators based on the temperature in the room. This can help reduce energy consumption and improve comfort levels.

5) Perform regular maintenance: Regular maintenance performed by a skilled technician, such as cleaning and tuning the system, checking pressure levels, and replacing worn parts can keep the hydronic system running efficiently.

By implementing these measures, you can improve the efficiency of your hydronic system and save money on utility bills while maintaining a comfortable indoor temperature.