APY. Annual Percentage Rate (APR) is normally used when you borrow money, such as mortgage loan. It is an annual interest rate without taking the compounding of interest within that year. For example, if a mortgage rate is 6% APR.It means, you will need to pay an interest of 6%/12 = 0.5% every month.ompound Interest Calculator. The Compound Interest Calculator can be used to compare the interest rates of different compound periods. By definition, the APR is the interest rate compounded monthly and APY is the interest rate compounded annually.
Locate the register or grille you are replacing and note if it is for a wall, ceiling or floor. Remove the screws that hold the vent in place. Pull the vent forward and out of the opening. Measure the size of the air duct opening. Do not measure the old register or vent.
4. Clean the filter. Remove the front grille from the air conditioning unit. Take out the filter and clean it either by vacuuming it or rinsing it with warm, sudsy water. 1  Make sure the filter is dry before you put it back into the unit.se a vacuum with a soft bristle-brush attachment. You may have to unscrew a protective metal case to access the fins. 1  Check for grass, weeds, leaves and other debris that may block airflow. 2  Trim any foliage to leave about 2 feet (61 cm) of space around the outdoor unit. 3  Be careful not to damage the fins as you vacuum.