Air Balancing is Testing, Adjusting, and Balancing commercial air conditioning and ventilation systems. There are not just a few words that describe it. Balancing first came in need in the early 80's when new and more advanced A/C systems were being installed. As these systems began to get more complex the need for balancing increased. A very expensive and complex system was not complete without an independent balance company doing the TAB work. We are mostly recognized for setting up the amount of airflow that would be distributed from each air diffuser. However, our job is much more involved than that. I've listed some of the items that are a part of balancing on most jobs:

• Measure total airflow on all A/C and exhaust systems
• Balance airflow on each supply and exhaust grille
• Measure volts, amps, statics, RPM's, temperatures, and set minimum outside air requirements on all A/C units.
• Balance water flow on all pumps, cooling towers, chillers, boilers, and air handling unit coils.
• Sound and Vibration if required.
• Air quality measurements if required.

In the last few years a new balancing task has presented itself. A large demand for HVAC commissioning has came about. This would involve the balancing group in the project much earlier than before. We would be working with the engineers in the designing of the system and with all other trades involved with the installing and start up of all equipment.

WHY AIR BALANCE?

Do you have some rooms that are too hot or too cold? Do you have "thermostat wars" as people disagree on settings as they try to get comfortable? Do you find that you must use supplementary heaters to keep warm in the winter, and supplemental fans to keep cool in the summer? If so, having your air duct system balanced might solve your comfort problems (and save you energy dollars to boot).

Air balancing is a process of measuring and adjusting air flow to the needs of the occupants. The first step is to analyze the building loads (need for heating and cooling) in each room or area. The next step is to record the information from the equipment, and all of the supply and return registers and grilles. By analyzing the load information the target airflow for each register and grille is recorded. After this information is recorded the equipment is started and the airflow through the equipment is measured as well as the static pressures created in the duct system. This information is recorded on the form.