Energy-efficient air filters for lower-energy but high-performing HVAC systems

Roughly half of HVAC filtration filter buyers are not using the most energy-efficient ​filters available to them. At first glance, that might sound like a technical footnote – the financial consequences are anything but. According to available data from Eurovent, the European industry association, these operators are paying a​​​​​​t least 40 per cent more in energy costs than necessary. And this is despite the fact that high-performance, energy-efficient air filters are now available across every filter stage and class. 

The root cause is a persistent misconception: most procurement decisions are guided by purchase price. Yet that figure accounts for only around ten per cent of an air filter's total lifecycle costs. By far the largest cost driver is the energy consumed during operation, which makes up roughly 80 per cent. Cutting corners on the purchase price often means paying many times that amount over the years of operation – without ever noticing it directly.

In air filtration, "​performance" is a term that gets used loosely. Genuine filter efficiency and dust holding capacity cannot be reduced to a single metric – it encompasses four dimensions that must be considered together: 

• Filtration efficiency: The separation rate – meaning how many particles a filter captures from the air, and how fine those particles can be. For air filters, the relevant benchmarks are typically filter classes ePM1, ePM2.5 and ePM10 under ISO 16890 but also EN 1822 for HEPA filters. 
• Energy efficiency: The electricity consumed by the air filter during operation. This is the dominant cost factor across the entire service life of the filter. 
• Material efficiency: The raw material input required during manufacture. Lower material use reduces the environmental footprint and simplifies disposal. Lightweight frames also reduce transport emissions. 
• Operational efficiency: How straightforward is the filter to install, maintain, and dispose of correctly? 

The key technical indicator for evaluating a filter's energy efficiency is pressure drop. The lower the pressure drop, the less fan power the system requires – and the lower the operating costs. This is precisely why filter selection is not a secondary consideration for energy-efficient HVAC (Heating, Ventilation, and Air Conditioning) units, but one of the most important levers available to any building operator.

To enable objective comparisons of air filter energy consumption, Eurovent developed its energy rating under Eurovent 4/21. This classifies air filters from A+ through to E, based on annual energy consumption measured in kilowatt-hours.

​​​​​​​The classes make a tangible difference in any energy-efficient HVAC system: an A+-rated filter consumes around 40 per cent less energy in operation than a C-rated equivalent. Over several years of operation, that gap compounds into a substantial additional cost.

So why do so many systems still run on Class C filters or worse? The reasons are well understood: procurement decisions have traditionally been driven by purchase price; tender processes still rarely account for the whole-life operating costs of air filters; and filter or HVAC upgrades are deferred because total cost of ownership (TCO) is not being assessed comprehensively. In many cases, however, switching to high-performance filters with a better energy class pays for itself within just a few months.  

The TCO model shows the true whole-life costs of an air filter. For HVAC operators looking to reduce operating expenditure, it is worth examining all four components of total cost:

1. Purchase price (~10% of lifecycle costs)
2. Energy costs during operation (~80% of lifecycle costs)
3. Maintenance expenditure (filter changes, labour time, operational downtime)
4. Disposal costs (transport, landfill charges)

​​The picture resembles an iceberg: only the tip is visible – the purchase price. The real costs lie beneath the surface, buried in energy bills over the coming years. The return on investment (ROI) of an energy-efficient air filter is correspondingly compelling: operators who choose energy-saving HVAC filters today benefit throughout the entire service life. Filters with a longer service life also reduce the number of filter changes required – and with that, transport emissions and landfill waste. Energy-efficient air filters therefore improve your sustainability performance at the same time.

Choosing an air filter means simultaneously making decisions about filtration performance, energy consumption and sustainability. Only by considering all three dimensions can you avoid the hidden costs that accumulate over years of operation. 

MANN+HUMMEL Air Filtration offers the EF Series – according to Eurovent data (as of January 2026), the broadest portfolio of A+-rated air filters on the market. It spans energy-efficient panel filters, A+-rated bag filters, compact filters, high-efficiency filters and molecular filters – across all filter stages, from the pre-filter onwards. No other manufacturer currently offers this combination in its entirety: MANN+HUMMEL brings together maximum energy efficiency and filter media free of added PFAS for more sustainable, high-performance air filtration. 

Ready to reduce HVAC operating costs, the greatest possible savings potential at optimal filter performance?