Another cause could be poor reconstruction of the nasolacrimal duct system after trauma to the area.

The top was solid, but the bottom was open, leading down into the duct system.

So once he got in the duct system, his head would either stay turned to the left or to the right.

A duct system often begins at an air handler.

But the range is $3,000 to $5,500 for a 2,500-square-foot house if it already has a duct system and $2,000 to $4,000 more if not.

The second part of the duct system is the vas deferens.

However, little evidence exists to indicate that simply cleaning the duct system will increase your system's efficiency.

The duct system can serve as a means to distribute these contaminants throughout a home.

Many insulated duct systems have operated for years without supporting significant mold growth.

The conveying fluid that flow through duct system is air.