Best ventilation is open soffit venting to a open vented ridge vent.
Fan ventilation attic.
One of the leading causes for fires.
Ridge vent must me installed per the manufactures instructions.
Do not use mechanical means electric attic fans.
Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.
However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic.
It can efficiently remove a larger volume of hot and or humid air from your attic when compared to static ventilation.
Good insulation reduces fan effectiveness.
Attic fan ventilation attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside.
This in turn can help save money on your heating and cooling costs.
The downside of attic ventilation fans.
Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic.
The result is a cooler attic space with plenty of air exchange.
However the utility of attic ventilation fans is actually quite a controversial topic.