Exhaust ventilation fans are only half of a functioning airflow system. For every cubic foot of air a fan removes, sufficient replacement air needs to enter the space to maintain the pressure relationship the system was designed around, or the building can no longer maintain its intended pressure relationship. Some negative pressure is intentional; restrooms, … Read more Why Negative Pressure Builds Up When Exhaust Ventilation Fans Aren’t Balanced with Makeup Air

A fan can spin at full speed, a damper can open and close on command, and a control panel can show every system as active, and a facility can still be poorly ventilated. Commercial ventilation equipment failing outright is easy to notice. Equipment that keeps running while quietly failing to perform is much harder to … Read more When Commercial Ventilation Equipment Keeps Running but Stops Performing Properly

A rooftop exhaust fan can be sized correctly, installed properly, and still create problems if the discharged air cannot disperse safely away from the building. Commercial rooftop exhaust fans don’t just need to remove air. They need to discharge air where it can safely disperse without being drawn back into the building. Discharge location determines … Read more Why Air Discharge Location Matters for Commercial Rooftop Exhaust Fans

Poor ventilation rarely announces itself as a specification problem. Instead, it shows up as uneven temperatures, lingering odors, moisture buildup along walls and ceilings, or a fan that runs constantly without actually clearing the air. These symptoms feel like equipment issues, but they usually trace back to the point where the fan was selected without … Read more How a Commercial Fans Supplier’s Technical Expertise Prevents Costly Airflow Problems

A ventilation exhaust fan rated for a specific airflow volume will almost never deliver that exact volume in an installed system. This is not a product deficiency. It is the predictable result of how air behaves when moving through ductwork. The gap between rated performance and real-world performance is determined by three duct factors: length, … Read more How Duct Length, Diameter, and Bends Affect the Real-World Performance of Ventilation Exhaust Fans