Ideally, air conditioning systems should spread an even amount of air throughout the entire building. In practice, though, a few potential issues may get in the way of that goal. Some of the air headed for one room or area may leak out of holes, cracks, and other flaws in the ducts. Technicians who want to measure ventilation, thermal comfort, and other aspects of system performance can get the data they want. They just need the right tools.

For over 100 years, Alnor Instruments — now a subsidiary of TSI Incorporated — has produced exceptional designs for measuring indoor environmental conditions. Among the best products in their entire line-up are their airflow hoods, also known as barometers. These devices, when calibrated well and combined with other devices, can give users an accurate reading of an HVAC system's airflow. Their design combines the century-strong expertise of Alnor Instruments with the latest technology.