03 May 2023

Blog post – Energy saving through air filtration optimisation

westbury sustainability

Heating, ventilation and air conditioning (HVAC) systems play a critical role in maintaining indoor air quality and thermal comfort. However, HVAC systems also account for a significant consumption of energy in many buildings. One way to reduce energy consumption and improve the efficiency of HVAC systems is by optimising the air filtration used in such systems.

Air filters are an essential component of HVAC systems, performing a crucial role in protecting people and processes by removing pollutants such as dust, pollen and bacteria from the air. However, any air filter(s) will also create a resistance to the air flowing through the system, which increases the energy consumption of HVAC systems. The higher the resistance, the more energy is required to move air through the system. Therefore, it is vital to select air filters that provide an appropriate filtration efficiency whilst also minimising resistance to airflow.

There are several ways to optimise air filtration and reduce energy consumption in HVAC systems:

1. Select the right air filter
The selection of air filters should be based on the needs of each application. A higher efficiency filter will provide better air quality, but it will also create higher resistance to airflow and increase energy consumption. It is essential to select air filters with the right balance of filtration efficiency and resistance. You can read more on selecting the right filter for your application here.

2. Maintain and replace filters when appropriate
The dirtier a filter becomes, the more resistance to airflow increases and the more energy consumption rises. It is crucial to maintain and replace air filters regularly to ensure that they perform at their best. Regular maintenance can help to reduce airflow resistance, improve air flow, and reduce energy consumption. You can read more on appropriate filter maintenance here.

3. Consider air filter retrofitting
Air filter retrofitting involves replacing existing filters with filters that have a lower resistance to airflow. In many cases this is straightforward and will deliver improved air quality, whilst drastically reducing energy consumption and allowing more air to be delivered through the system. Retrofitting can also help to extend the life of HVAC systems and reduce maintenance costs. You can read more about upgrading your filtration here.


Optimisation of air filtration is a highly effective way to reduce energy consumption and improve the efficiency of HVAC systems. A combination of correct selection, appropriate maintenance and consideration of filtration improvements can all combine to deliver reduced energy consumption. In this way building owners can save money on energy costs, reduce carbon emissions and improve the overall sustainability of their buildings. 

Contact Westbury today to discuss getting started with your FREE energy consumption assessment.

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