Understanding The Value of Energy Savings
One way to assess the cost-savings associated with energy can be by looking at the overall impact of a filter’s pressure drop (otherwise known as resistance to air flow) on energy costs.
Interestingly, often more money is saved in energy cost than there is in the initial filter price. In addition, the money saved with reduced energy costs may be a good way to “pay” for upgraded filter efficiency and upgraded indoor air quality.
For those who may think that such a “magical money-saving filter” doesn’t exist, remember that the data presented above was generated from commercially available filters. Actually, development of newer materials has provided the filter industry with a chance to produce mechano-electrical filter media, which has less resistance to air flow, thus reducing electricity costs in use while maintaining high particle capture efficiencies. With a lower resistance to air flow, the HVAC system needs to overcome less resistance to deliver the required air flow, thus reducing the system’s energy consumption and contribution to greenhouse gas emissions – a wise sustainability strategy.
Once you’ve specified that energy-efficient air filtration system, don’t put off regular filter change-outs in an effort to save money. Delaying change-outs can cause the filter to run longer at peak airflow resistance and energy use.
When evaluating your current air filtration strategy, the best approach is one that allows you to find the right balance between indoor air quality and the full lifecycle costs. The most energy efficient air filters that provide the level of air quality your tenants/employees demand is a winning combination.
When thinking about the energy costs of various filter technologies versus their air filtration efficiencies, ask your filter supplier or HVAC maintenance contractor the following questions:
1) At a given performance level, how much money could be saved by using a filter with a lower resistance to airflow?
2) What amount of reduction in airflow resistance offsets the difference in initial filter price?