The best time to plant your corn seeds is when the soil temperature reaches an average of 50 degrees Fahrenheit. You can determine the average ground temperature in your garden using a soil thermometer -- available at most garden stores.
Vents are a major component in a home's drainage system. Venting allows water to pass out of the drains easily. Today, houses are vented through the roof. Roof flashing, made from heavy grade rubber, lead or sheet metal holds the vent pipe in place. Another thing to consider is pitch.
The return vent, or register, is also known as an air return vent, and a cold air return vent. It accomplishes just what the various names imply, return colder air, via registers and ductwork, to the furnace so that it will run as designed. Return vents also provide proper air circulation throughout the structure.