The answer to 'which is better roof vent or' is that both roof vents and roof fans can be effective at improving attic ventilation, but the best choice depends on the specific needs and characteristics of your home. Roof vents are a passive system that allows hot air to naturally rise and escape, while roof fans are an active system that uses electricity to pull air out of the attic.
Roof vents are generally less expensive to install and operate, as they don't require electricity. They can be effective in homes with good natural airflow and moderate attic temperatures. Roof fans, on the other hand, are better suited for homes with poor natural ventilation or high attic temperatures. They can more effectively remove hot air and improve overall attic cooling, but they do require a power source and ongoing energy costs.