A client wants to integrate a new heat recovery ventilator (HRV) into their existing forced-air hydronic heating system. The HRV requires a heating coil for tempering incoming fresh air. As a plumber, what aspect of the hydronic system would you need to assess to ensure proper integration of this new heating coil?

Question: A client wants to integrate a new heat recovery ventilator (HRV) into their existing forced-air hydronic heating system. The HRV requires a heating coil for tempering incoming fresh air. As a plumber, what aspect of the hydronic system would you need to assess to ensure proper integration of this new heating coil?

Answer options: ✅ The current boiler's output capacity and the spare capacity in the hydronic loop.

• The size of the existing domestic hot water tank.
• The type of thermostat connected to the heating system.
• The material of the existing ductwork in the house.

Correct answer: The current boiler's output capacity and the spare capacity in the hydronic loop.

Explanation: Adding a new heating coil to a hydronic system introduces an additional heat load. It is crucial to assess if the existing boiler has sufficient output capacity to handle this new demand without compromising the heating of the rest of the building. The domestic hot water tank size, thermostat type, or ductility material are not directly relevant to the hydronic capacity for the new coil.