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The Importance of Regular Commercial Air Duct Cleaning

Commercial building air duct cleaning in a high humidity area, such Houston, is as much about saving energy and utility costs as it is about indoor air quality (IAQ). The US Department of Energy states that “a dirty Condenser Coil can increase compressor energy consumption by 30%”.

In an HVAC system there are two areas where the heat transfer occurs: the condenser coils and the evaporator coils. Contaminants on these coils act as insulators, decreasing the heat transfer that is needed to cool a building, and causing the system to work harder and longer to maintain the desired temperature and humidity levels in the building. These contaminants also decrease the amount of air flow over the coils, further decreasing the efficiency of the air conditioning unit.

Dirty Evaporator Coils are not only less efficient at removing heat from the air, but are also less efficient at removing moisture from the humid gulf coast air. Today’s more efficient HVAC systems must transfer air at increased pressures over larger evaporator coils to operate at peak efficiency. Dirty condenser coils and vanes cause the fan motors to run harder, increasing energy consumption and decreasing the life expectancy of the motors.

The fans themselves also need regular cleaning as they will become less efficient with contaminate build up. The humid Houston air makes it even more likely that dirt and other contaminates will adhere to the fan and fan housing.

From the above, we can see that Commercial HVAC System Cleaning is much more than just cleaning a building’s air ducts. Cleaning the coils and fan assemblies can save you money in a variety of ways.

1. Clean coils remove more heat and humidity from the air faster with less work, so they use less energy.
2. Clean coils offer less resistance so that fan motors don’t have to work as hard, saving energy and increasing the life expectancy of the motors.
3. Clean fan and fan housings move air more efficiently with less effort.

To help reduce utility costs and maintain overall indoor air quality, The National Air Duct Cleaners Association (NADCA) recommends the following HVAC inspection schedule.

Industrial Building Use
• 1 year – Air Handling Unit
• 1 year – Supply Ductwork
• 1 year – Return Ductwork/Exhaust

Residential Building Use
• 1 year – Air Handling Unit
• 2 years – Supply Ductwork
• 2 years – Return Ductwork/Exhaust

Light Commercial Building Use
• 1 year – Air Handling Unit
• 2 years – Supply Ductwork
• 2 years – Return Ductwork/Exhaust

Commercial Building Use
• 1 year – Air Handling Unit
• 2 years – Supply Ductwork
• 2 years – Return Ductwork/Exhaust

Healthcare Building Use
• 1 year – Air Handling Unit
• 1 year – Supply Ductwork
• 1 year – Return Ductwork/Exhaust

Marine Building Use
• 1 year – Air Handling Unit
• 2 years – Supply Ductwork
• 2 years – Return Ductwork/Exhaust


Be sure to contact your local commercial air duct cleaning company for more detailed information. Remember, reducing the buildup of contaminants is a sound financial decision for any commercial property owner, whether you work in Houston or a cooler climate.

If you could control ONE element, which element would it be?

Fire Water Earth Air Energy

Energy.. But is that considered an element? Then water.