Supply vents deliver conditioned air from the HVAC system into the rooms, while return vents pull air from the rooms back ...

But that's not all: HVAC system imbalances could also end up harming your home, or even your health. "Proper air circulation is essential for maintaining good indoor air quality," says Hiller.

[WJCarpenter] had a common HVAC problem; not all the rooms got to a comfortable temperature when the heater was working to warm up their home. As often happens with HVAC systems, the rooms ...