Airflow Determination - Indoor Coil

Airflow Determination - Indoor Coil
The heat pump system has been designed for optimum
performance with an airflow across the indoor coil equaling
approximately 400 CFM/TON e.g. A 2 TON system should
have 2 x 400 CFM/TON = 800 CFM. The systems airflow
can be determined by several methods.
Airflow Test Instruments
There are a number of readily available instruments that can
be used in the field for airflow determination such as
Barometers, Volume-Aire Air Balancers, Anemometers, and
Velometers. When using these devices it is important to follow
the manufacture's instructions provided with them.
Temperature Rise Resistive Heat Method
Although this method is not as accurate as the use of test
equipment, a method of determining the indoor airflow in a
system employing electric resistance heat as the backup heat
source is by the Temperature