Duct Leakage Testing Procedures

The combined length of duct running on modern homes amounts to millions of kilometers. These duct system help to deliver warm or cold air into rooms and when they are leaking, they can lead to undesired results. For example, the duct can leak cold air into rooms when only warm air is intended and this would result in humidity problems inside those rooms. The duct may also deliver dust particles and debris from outside through its leaks even when the standard outlets have a filter.
The essence of testing your ductwork is to verify how much air pressure is needed to pass the air from the calibrated fan to the end of the duct. When there are no holes other than the required duct outlets, the system will require less air to change pressure in the ductwork.

Duct leakage testing procedures

Common Duct Testing Procedures

There are two main duct-testing produces namely the duct blaster and the blower door. The first one uses air pressure on the duct while the latter uses the entire room or house to find out the efficiency of the ductwork. In the duct blaster, you test the efficiency of the duct system by blowing air into the duct and letting it build pressure to the recommended standard. The register used in the procedure will then indicate how much air was blown to realize the required pressure. The pressure level that you now record should match the manufacturer’s specification and if that is not the case, then your duct has leakages.

When the duct is working well, air will flow from the calibrated fan that is connected to the unsealed register. As this happens, pressure will build within the ductwork and the air will have to move to exit spaces in the ductwork. The air will flow through the various holes or outlets and through seams or joints that are present in the furnace and air conditioner. The blower door testing procedure is not common though it is applicable in single person households as well as multi-person households. Most applications of the blower door procedure occur on commercial buildings because the costs of this procedure are higher than the duct blaster procedure. Once the whole house is pressurized, the tester will compare the pressure when registered are sealed and when they are not. The difference in this pressure indicates the amount of leak in the house duct system.

What is next after Testing?

Once you make up the conclusion that your duct is leaking and needs ac repair westonfl, the next step is to find out exactly the spaces or joints that are leaking. You can opt to use a fog machine that will pump a nontoxic foggy substance through the duct. The fog will leak out at all openings thus providing a visual pin pointing tool that will aid your ac repair westonfl work. Before repair, you can still increase the air speed of your calibrated fan to compensate for the pressure loss through the duct leaks. This option should be only a temporary measure because the energy costs associated with extra air pumping are very high.