One inch filters cause a variety of equipment problems. because of their high static pressure and low dust holding capacity, they require frequent change outs. often, this does not happen with adequate frequency, resulting in frozen or dirty coils and inefficient equipment performance.
Low Velocity Reduces Resistance
- Velocity is the speed at which air moves through a filter.
- The larger the media area the lower the velocity.
- The lower the velocity, the lower the resistance, the better the air flow.
Just like holding back water flow from a hose to increase pressure and create more velocity to the stream of water, restrictive undersized filters add pressure to HVAC systems.