What Does Your Duct System and Blood Pressure Have In Common?

What Does Your Duct System and Blood Pressure Have In Common?

With all the emphasis today on the efficiency of your central heating and air conditioning unit, there is one constant in the equation that’s being overlooked.  “DUCTWORK”. Your ductwork plays a major role in not only the efficiency of your unit, but also the life span or health of your unit. It could be considered the blood pressure of your heating and air conditioning equipment.  Blood pressure high or low may not affect you right away, but over time it could have a detrimental impact on your health.  It is the same way for your heating and air conditioning equipment.


Your body’s life source is the circulation of blood.  Your central heating and air conditioning unit’s life source is the circulation of air.  The circulation of blood in your body is measured in blood pressure and the circulation of air is measured in static pressure.  High or low static pressure causes your unit not to be as efficient. It also creates added stress on your blower motor, compressor, and heat exchanger for gas furnaces.


Trying not to get to technical, your unit requires roughly an airflow of 400 cubic feet per minute (CFM) per one ton of air.  For instance, if you have a 3-ton unit, it requires 1200 CFMs to operate properly.  Your unit may require a static pressure of .5 inches of water columns, which is how static pressure is measured, to deliver 1200 CFMs of air.  If the static pressure is off, your unit cannot circulate 1200 CFMs of air that it requires to function properly.  The airflow is what balance the refrigerant pressures that’s feeding back to your compressor, therefore putting added stress on the heart of your unit and other major components.


Ductwork in the past years has been majorly overlooked, yet it is vital to the health of your central heating & air conditioning unit. Static pressure and duct leaks are believed to be a major cause for system breakdowns.  In fact, The Environmental Protection Agency (EPA) estimates that up to 30% of the air that passes through ducts in the average home is lost to leaks.  The National Comfort Institute (NCI) has compiled that the national average for HVAC system’s performances comes in at only 57% of the unit’s rated capacity.  That is a lot unnecessary money spent in system breakdowns and high utility costs.  Call us or email us today and have your duct system evaluated.