1.   Although rabbits, dogs and rats have tear ducts, only humans cry for stress-related reasons.

2.   If one of the rooms has more than one heating duct, you might try closing off the duct in the common wall.

3.   It has exhaust ducts resembling a skateboard ramp and a surprisingly low-tech steel ring comprising the nucleus of the facility.

4.   My bedroom has duct,s but no heat comes out of them.

5.   One thing I would avoid when having ducts cleaned is to have any kind of a liner sprayed into the ducts.

6.   The metallic twang of steel ducts is out because you have no ducts.

7.   Well-designed systems have supply ducts for the hot air and return ducts for the cold air.