Defending your selection of air filters in a lawsuit should be easy, right? But is it really? There are a lot of factors to consider when designing HVAC systems for occupied spaces, including the cleanliness of the outside air used for ventilation.
As with most HVAC system decisions, professional engineers face a challenging balancing act when considering comfort (ASHRAE 55), health (ASRHAE 62), and energy (ASRHAE 90). In addition, it is important that the building be provided with maintainable systems with accessibility for a facility maintenance staff to properly maintain the basic products, such as the outside air filters.