Find the square foot of the room by measuring the length x width. (L x W)

Using the Room Size Chart below, find the air required for the room. Or multiply the square footage found in step 1 by 0.66 (Length x Width x 0.66) this will tell you how much air this room needs.

If there is more than one register in the room, divide this number by the number of registers in the room (this indicates the CFM needed per register).

Measure the air duct size servicing the register, using the Comfort Ring Balance Chart, match the orifice size to the air required (determined in Step 2) Then remove the detachable rings until you reach the correct orifice size on the Comfort Ring. It's always better to choose a smaller orifice opening if it does not match what you are looking for. You can always go back and remove one ring to allow more air in.

Remove the register and insert the "Comfort Ring" selected for this register into the "register boot" then reinstall register (Make sure register damper is 100% open if provided).

Complete these steps in every room that has a register.

You may find that the required amount of air exceeds the selection on the Comfort Ring.  If this is the case, do not install a Comfort Ring in the register. Proceed on to the next room.

After you have proportioned the air in every room using the Comfort Ring, wait a few hours to let the temperature throughout your home equalize.

You should experience temperatures within + or - two degrees after balancing the air throughout your home or office.

If you do not, you should consult a professional to evaluate your heating and cooling system.

If you find a room that may need a little less air, you can reduce the air flow by using the register damper by closing it slightly. If your register does not have a damper you can reinstall a new Comfort Ring with a smaller orifice selected.

If you find a room that may need a little more air, simply remove the Comfort Ring.  Remove the next orifice ring, and reinstall.