A vertical, air filled pipe that prevents water hammer by absorbing pressure when water is shut off at a faucet or valve.
Air change
A measure of the rate at which the air in an interior space is replace by outside (or conditioned) air by ventilation and infiltration; usually measured in cubic feet per time interval (hour), divided by the volume of air in the room.
Air changes per hour (ach)
Air Changes Per Hour. The number of times that air in a house is completely replaced with outdoor air in one hour.
Air check
A device that allows water, but not air, to pass through it. An air check is a typical component of a treatment system using a regenerant eductor.
Air cleaner
Device used for removal of airborne impurities. A device that actively removes impurities from the air, including forced air filtration systems and electronic air cleaners. Air cleaners may be added to HVAC systems or stand-alone room units.
Air coil
Coil on some types of heat pumps used either as an evaporator or condenser.
Air collector
In solar heating systems, a type of solar collector in which air is heated in the collector.
Air compressor
Pneumatic tools rely on an air compressor for their power source. Air compressors come in a variety of sizes with different horsepower and air tanks designed for jobs from the simple inflation of toys, recreation and camping equipment or tires, to more demanding tasks like spray painting, sand blasting, nailing, stapling and a variety of mechanical repairs.
Air compressor connector
Air compressor connectors join pneumatic tools to the compressor hose for easier maneuverability and fast tool changes. Quick connect couplings feature 360 degrees valve-to-plug contact for maximum air flow and extended coupling life. A ball latching mechanism provides accurate alignment and allows swiveling and multi-ball bearing latching. Many connectors use zinc chromate plating to resist moisture-caused corrosion.
Air compressor cut-in/cut-off pressure
The cut-in/cut-off pressure is the specific psi at which a compressor starts and stops while refilling an air tank.
