This is usually a low-cost credit. However, the MERV 13 filtration requirement can increase operational costs for added energy use and more frequent filter changes. If your ventilation system is not typically sized to accommodate a MERV 13 filter, you may

This is usually a low-cost credit. However, the MERV 13 filtration requirement can increase operational costs for added energy use and more frequent filter changes. If your ventilation system is not typically sized to accommodate a MERV 13 filter, you may have to choose a new system or have one custom-designed, which can add cost. Customization may include resizing ductwork, increasing fan capacity to maintain air delivery despite the added resistance of MERV 13 filtration, or other modifications to system design.