i have a high pressure centl a/c system with ceilingvents. how can i control the air flow in certain rooms whe

Answer 1

Usually there is a damper control on the register that will allow you to attempt an air flow adjustment. Generally, this is bad business. Any restriction to the air increases the static pressure on the entire air distribution system, and can have a ripple effect including increased humidity, sweating, premature failure of the equipment, and mold growth.

My advice is to balance the air distribution by using the proper size ducting. If this is completely impracticle, it is best to reduce air flow in a particular room by inserting ductboard inside the regiter "can" and cutting out a smaller opening that provides the desired amount of air, and keep the adjustable louvers wide open. This will keep the register from "sweating."

Answer 2

Each of your room outlets louvers should have a level to permit you to control the air into the room. If your vents don't have this feature, you should be able to get some that do.

Reducing the flow to one or two rooms will only raise the static pressure by a miniscule amount and will not have an effect on the performance of the A/C system. They put those dampers in for a reason. It is almost impossible to get the ducting design perfect. The dampers allow you to fine tune the system.

The use of dampers does not cause sweating.

Answer 3

Are you sure it's a "high pressure" (high velocity) system? If it's a conventional system w/ 6" or 8" flexible supply branches, you may have manual dampers. A supply register (louver) has a blade that will close, but is meant to be used to direct air. Shutting the blade at the registers can promote noise issues. Trace the duct from the register to the connection made at the main supply trunk, plenum or distribution box. At this connection the duct should be attached to a collar that may have a manual damper. If present, this is the best point to direct air for that run.

Answer 4

i am guessing this is like what is called a "space pack" unit. small round vents, about2" or so around? if this is the case, generally, there are no dampers in these systems. there isnt much you can do to control the air flow. these systems are engineered to have a specific amount of supplies and returns, so if you were to try to close or block off any, not only do you risk damage to the system, i may also get quite a bit louder. you could check with a contractor about relocating different ones possibly...

Answer 5

Listen to the "dude".