A question about using a powervented flue instead of a traditional chimney. Perhaps it is due to my perhaps limited understanding of the way a powervented appliance works, bit I would greatly appreciate an explanation please. For instance in a gas or oil boiler, the powerventer operates when the boiler fires, venting exhaust gases.
However in a coal stoker, the pile of coal within continues to smolder and burn, even if the boiler is not "firing". Therefore:
1. How is the matter of exhaust gases when the boiler is not firing dealt with? The continuously smoldering pile of coal requires venting, which in a traditional flue, relies on the natural draft present to evacuate flue gases. How is this dealt with in a powervented situation? Is the powerventer continuously running or does it operate on a timed schedule, every few minutes?
2. In an electrical outage, the pile of coal will continue to smolder, yet no electricity is available to operate the powerventer and thus evacuate flue gases. What is the method of dealing with this situation?