How many soffit vents do I need for proper ventilation in my home?

The number of soffit vents needed for proper ventilation in your home depends on the size of your attic and the type of roof you have. As a general guideline, it is recommended to have 1 square foot of ventilation for every 150 square feet of attic space. This typically translates to about 1 soffit vent for every 150 square feet of attic space. It is best to consult with a professional to determine the exact number of vents needed for your specific situation.