A2. Assuming you refer to the diameter of air handling ducts, then the cross - sectional area will increase as the square of the diameter. A 10" duct will have an area of pi x (10^2)/4. A 6" duct will have an area of pi x (6^2)/4. I'll leave you to the math.
A1. Well if 6 i ducts= 12 ducks, then I would assume that 6 in ducts can roughly equal a ceramic duck.
You should get your ducts cleaned on really any house every five to ten years. It is best to do it like that so you know your house is as efficient as you can get it.
Ten.
10 ten thousand
Ten thousands pennies equal what
Eight of them.
50000
hundread hundreads is equal to ten thousand...........
Ten cups = 5 pints.
Forty quarters equal ten dollars.
Ten millimeters is equal to .01 meters.Ten millimeters is equal to 1 centimeter. Ten millimeters is equal to .3937008 inches.
There are four cups in a quart, so ten cups would equal 2.5 quarts.
100,000 ten-thousands to equal 1 billion.