Question on the correct venting of a roof with a power ventilator. I inspected a home this weekend that has a hip roof style. The only ventilation the roof has is a power ventilator. No soffit, ridge, gable or roof vent system. Should there be some type of free air venting through the attic. The home is over 100 years old so its not very tight, plus my feeling is its pulling all the AC/heat out through the ventilator. The roof isn't in that bad shape?