The combustion of gas in the burners provides heating to the system. Over time, soot builds up on the burners, effectively insulating more and more of the heat from circulation. The reduction in heat supplied to the exchanger leads to an increase in fuel consumption to compensate. Consequently the efficiency of the system drops and your utility bill increases. Cleaning the soot off of the burners removes the insulating effect and restores their output to peak capacity.
Pledge: We will clean the burners of soot build-up.