Why is an additional power venter needed if the furnace already has an inducer?
The inducers in the furnaces have a distance limitation that would prevent them from venting safely from various locations. Also with the elimination of the HTPV (High Temperature Plastic Venting) systems the power venter is a safer and more efficient way of venting the furnace. Keeping the venting system under a negative pressure causes less worry of cracks. If one does occur, it would draw air into the venting system, not leak it out like a positive pressure system would.
