Replacing an old inefficient burner with a new high efficiency one reduces what loss?

Replacing an old inefficient burner with a new high-efficiency model primarily reduces off-cycle loss. Off-cycle loss refers to the energy that is wasted when the burner is not in operation, such as heat escaping from the boiler or furnace when it is not actively heating. Older burners tend to have less effective insulation and design, leading to higher off-cycle losses as heat can escape more readily during non-operational periods.

By upgrading to a new high-efficiency burner, the design typically includes better insulation and more effective heat retention features, which minimizes the amount of heat that is lost when the system is not actively heating a space. This improved efficiency results in a more effective use of the fuel consumed, ultimately leading to better performance and cost savings over time.

While the other aspects like overall energy consumption and combustion emissions may be positively impacted by the new burner, the most significant improvement specifically related to off-cycle losses is the immediate benefit from the upgrade.