Can someone explain to me what direct power vent is? I understand that direct vent and is the vent that vents naturally, power vent has blower, what "direct power vent" is? I am going to buy and install A.O. smith vertex 100 direct power vent water heater both for DHW and radiant heat. I can't figure out how to proper vent it. The manual shows both direct vent code requirements and power vent code requirements but not for direct power vent.
I will probably vent the heater with separate inlet and exhaust pipes through the side of the wall. How far apart they need to be? How far do they need to be from furnace exhaust vent also through the side of the wall (rim joist)? Any clearance needed from basement bath exhaust fan vent in the same side wall?