Ductwork Pressure Testing finds leakage & air-flow problems
What is a “Static” Air Pressure Test?
Al’s Plumbing Heating and Air Conditioning performs static air pressure tests and make changes (if required) to ensure your HVAC system has the correct air-flow, and no heated or cooled air ends up in your attic. Ductwork repairs decrease utility bills while increasing comfort level. Call Al’s today for a static-pressure test
Air-Duct leakage, or inability to handle airflow are the reasons why air-flow is higher` coming into the system (from the air-returns) than the air-flow leaving the system (from the ducts). Measuring static pressure tells us how your duct system is performing.
What Does The Static Air-Pressure Test Tell You?
Static pressure is the measure of the airflow resistance in the duct system that the fan has to work against. The higher the pressure, the harder the fan works resulting in shorter life and reduced airflow to rooms.
How An Air-Pressure Test Works:
Al’s Plumbing, Heating and Air Conditioning takes two pressure readings:
- The air pressure entering the system
- The air pressure leaving the system.
- We add the two pressures together for the total pressure.
- If the Static Air Pressure reading is Too LOW (less air leaving than entering) — there is likely ductwork leakage.
- If the Static Air-Pressure reading to Too High (more air entering than leaving) — there is air-flow blockage somewhere.
The goal is simple: the total amount of air coming out of all the rooms’ ducts should be close to the total amount of air going into the return-air vents. If there is less air coming out, it’s leaking from the ductwork, or the ductwork needs repairs or retrofits.
Photos of leaking ductwork
Al’s Tip – Usage of High Efficiency (high Merv) Air Filters :
Using a 1 inch High-Efficiency Air Filter dramatically reduces system air-flow. Why? The higher the MERV rating, the smaller the filter’s pores are. These pores are where air flows through the filter. This can create reduction in airflow the system was no designed to handle, making it operate improperly.
Reducing the air flow in your heating / air conditioning can create excessive demand on the furnace blower and other components in the system. Reduced air-flow can cause the a/c to “freeze up” in summer, resulting in no air-flow through the frozen a/c coil inside the furnace (which results in no air-flow through the system).
This YouTube video shows the reduction in system air-flow by 50% caused by a High-Efficiency 1 inch filter.
When the 1 inch filter is replaced by a 4 inch filter, the reduction in air-flow is only 10%. This is because there is four times as much filter-media for the air to move through, resulting in a minimal reduction in air-flow.
Al’s Plumbing Heating and Air Conditioning can perform static air pressure testing and make changes (if required) to ensure your HVAC system has the maximum air-flow possible, and that no heated or cooled air ends up in your attic. You will see the difference the repairs make in utility bills, comfort level, and system lifespan. Call Al’s today for a static-pressure test.