Flexible, spiral wound outer covering with insulated electrical wiring inside.
Arnott valve
Located at the top of a room or space, a one-way or check valve is operated by gravity, permitting the escape of air from that space.
Arpent
Measurement of land equal to .846625 acres (French)
Array
Tax assessor term describing a certain category of properties sold with a given amount of time.
Array (solar)
Any number of solar photovoltaic modules or solar thermal collectors or reflectors connected together to provide electrical or thermal energy.
Arrears
Late or overdue payments and are in default.
Arrester
Wire-mesh screen protecting a fuel tank vent from flame propagation or covering an outlet to prevent sparks from escaping a heat or spark-producing source, such as an incinerator or chimney.
Arris
Formed edge when two surfaces join.
Arris fillet
Wood strip which runs along a roof at the eave line to raise the end of the first course of shingles, tiles or other roof covering so that water will run off the edge of the roof.
