Armstrong Air Systems are very unique HVAC systems because they have integrated compressor protection. These systems are built with high and low pressure switches. The high-pressure switch is in place to stop the operation of the AC unit if the pressure of the refrigerant is to high for the compressor. The low-pressure switch is in place if there is no refrigerant in unit, this will stop the AC unit from drawing moisture from outside of the unit. Not many other AC systems have protection systems like this.
Armstrong Air Handlers
Armstrong has a few basic air handlers in their inventory for air handlers and these air handlers compliment their gas furnaces, oil furnaces, and other air handling devices including electric furnaces. Armstrong air handlers are available to fit in small spaces and in a variety of configurations. The premium models enhance efficiency and comfort but do cost more than the other economical models.