Installing an automatic vent damper on a boiler improves efficiency by doing what?

Installing an automatic vent damper on a boiler improves efficiency by doing what?

• A. Increases steam production
• B. Reduces loss of heated air between cycles
• C. Raises boiler temperature
• D. Increases radiation losses

Answer: (B)

Reducing heat loss through the vent when the boiler isn’t firing is how an automatic vent damper boosts efficiency. After the burner shuts off, hot combustion gases would normally keep escaping up the chimney, wasting valuable heat. The vent damper automatically closes to trap that heat inside the boiler and its piping, so less energy is wasted between cycles. That saved heat means less fuel is needed to bring the boiler back up to temperature and produce steam, which is why efficiency improves. It doesn’t directly increase steam production, raise the boiler temperature, or create more radiation losses.

Reducing heat loss through the vent when the boiler isn’t firing is how an automatic vent damper boosts efficiency. After the burner shuts off, hot combustion gases would normally keep escaping up the chimney, wasting valuable heat. The vent damper automatically closes to trap that heat inside the boiler and its piping, so less energy is wasted between cycles. That saved heat means less fuel is needed to bring the boiler back up to temperature and produce steam, which is why efficiency improves. It doesn’t directly increase steam production, raise the boiler temperature, or create more radiation losses.