Have you ever been in an office, apartment, or other indoor space that just feels… Off? Chances are, if you’re feeling a bit stuffy, the culprit might be your unit ventilator. A unit ventilator is a type of heating and cooling system, located in many commercial and residential buildings all across the world. Unit ventilators bring fresh, outside air in to improve indoor air quality and help maintain comfortable temperatures. But when it comes down to it—just what is a unit ventilator, exactly? Let’s explore the official definition of a unit ventilator, including its primary function, advantages, and how they benefit indoor spaces.