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Restricted budgets challenge facility owners and operators to seek solutions that help save energy and reduce operating costs, while maintaining appropriate indoor air quality.


Evaluation of HVAC filters should include a comparison of total cost of ownership to have the largest impact on reducing total cost, while maintaining indoor air quality. The initial filter purchase cost can be as low as 7% of the total operating cost for HVAC air filtration. Supply and return fans consume approximately 5% of all energy used. Utilizing HVAC air filters that have a low pressure drop over their life, can have a meaningful impact on this energy consumption. In addition, HVAC filters that last longer can be replaced less frequently, thereby reducing disposal and shipping costs, and potentially, saving labor and/or service costs.


There are five components of the total cost of ownership for HVAC filters:


1) cost to purchase the filters,
2) cost of the associated energy use,
3) cost of labor for installation and replacement,
4) cost of disposal and
5) cost of shipping filters to the facility.


In certain HVAC systems, the cost for the energy required to move air through the filters is often the greatest component of total operating cost. This energy cost is proportional to the average pressure drop of the filter over the time period assessed. The difference in energy cost of two different filter systems is proportional to differences in their respective average pressure drops.


There are several scenarios where tremendous reduction in energy may be achieved by using Nanofil HVAC filters that are currently under development:


1) when replacing filters with higher pressure drop,
2) when replacing filters which do not maintain low pressure drop over time and
3) when replacing a pre-and primary filter combination, wherein the combined pressure drop is much higher.


As an added benefit, the reduction in energy use from lower pressure drop filters results in a reduction of CO2 emissions from power plants.


The cost associated with the labor of taking used HVAC filters out of the air handling unit (AHU), installing new filters, ensuring sealing of the individual filters to minimize air by-pass, and transporting the used filters to the disposal site, are referred to as labor cost.  Nanofil Filters, which are designed and engineered with high filtration efficiency and low pressure drop may last longer than alternative competitive products.


The cost of filter disposal is influenced by many factors including volume, weight, and metal content.


The cost of shipping filters is partially determined by the key factors of filter volume and change-out frequency.