Author name: Keith Jordan

Here’s something I found at a small commercial site recently. The exhaust fan shown was originally intended to discharge stale air to outdoors via a gooseneck on the rooftop.The flex duct was not properly fastened to the discharge duct. Over time the fan simply blew the flex duct off the hard pipe allowing stale air […]

“This fan coil unit was supposed to deliver 800 cfm yet total airflow at the outlets was only 30 cfm…” This is a photo showing a portion of a heating coil inside an HVAC unit. I wish I could have got better pictures but access to the unit was very poor. What you are looking

The sheet metal company installed the ductwork and roof curb correctly. Then the rooftop HVAC unit was placed on the roof curb. The electrical power and thermostat were properly connected and the gas line was properly connected. The sheet metal company called a separate HVAC contractor who did a “start-up” on the unit. Finally the system was ready for balancing. We arrived on

I was checking air flows in a commercial building the other day. The building owner had received complaints of stuffiness, and HVAC systems not providing enough cooling to some zones. I came across a diffuser in a corridor that had no airflow. The balancing damper was wide open and all the other diffusers on the