Air Watts :
a) Cleaning Power,
b) Electrical consumption less heat loss,
c) Combination of succion and airflow.
d) Efficient portion of the electrical consumption used for the cleaning.

Aluminum (spun)

Manufacturing technique by which a flat aluminum disc is molded to create a deep container from a single piece of metal without the need for soldering. The dust recovery tanks as well as several other parts of Duo Vac equipment, are made by this process. All parts manufactured in this way are free from air leaks thereby guaranteeing maximum vacuum strength. Aluminum is light, corrosion resistant and won't burn.

Amp. Max.
Maximum electrical current in amperes required by a machine.

By-Pass
A property of certain vacuum motors which are air cooled by a ventilator which is independent of the cleaning air. Generally found in two types, tangential exhaust systems and peripheral exhaust systems.

CFM
Abbreviation for "cubic feet per minute". Unit of air flow.

CVS
Abbreviation of central vacuum systems which define the package of tubes wall inlets and accessories connected to a vacuum power unit to collect dust and other elements that can be "vacuumed"

Cyclonic
The primary filtration system by which air is separated from dust particles using cyclonic action and centrifugal force inside the vacuum. Dirt is projected towards the perimeter while the air which has been separated from the dirt particles is evacuated through the center. Through gravitational force the heaviest particles fall to the bottom of the dust container and smaller ones are caught by the filter.

Depression in a column of water (H20)
The height to which the vacuum can suck water in a column (for example, in a pipe 2 inches or 50.8 millimetres in diameter), and maintain the level consistently.

DUOFIBTM
The DUOFIB™ filter which is used by Duo Vac is composed of a laminated structure with micro fibres of Herculon™ polypropylene which captures particles as small as 0.1 microns with an efficiency of 97.5%.

HEPA
(High Efficiency Particulate Air) Filtration specification system. A HEPA filter must capture all particles which are 0.3 micrometers or larger 99.97% of the time.

HP
(Horse Power) Measure unit of power equal to 745.7 Electrical Watts, or 33,000 foot-pound/minute or 2,545 BTU/Hour (British Thermal Units).

L/sec.
Abbreviation of "litres per second". Refers to airflow.

Mbar
Abbreviation of "millibar". Each unit of pressure equals 1/1000's of a Bar.

Micron
A unit of length or depth. One micron equals 1/1,000,000 metres.

m3/h
Abbreviation of cubic meter per hour. A measure of airflow.

Peripheral Exhaust
The property of certain vacuum motors to exhaust cleaned air through many small openings on its perimeter.

Piping systems
PVC pipes and rigid connections specially designed for CVS (central vacuum systems), which are mechanically assembled to complete the air movement portion of a central vacuum system.

PVC
(Poly Vinyl Chloride) A thermo plastic material which is both very tough and easy to colour. It is used in the manufacture of tubes or piping systems and fittings used to install the central vacuum system.

Vacuuming power
Commonly used term to indicate air watts.

Tangential Exhaust
Property of certain vacuum motors to exhaust cleaned air through a single exit pipe on its outside perimeter.

Thru-flow
Property of certain vacuum motors which are cooled by the flow of cleaning air through the casing.

Tubing
Pipes and rigid connections which are mechanically assembled to complete the air movement network of a central vacuum system.

VAC
Unit of measure of electrical potential, Volts in an Alternating Current, normally indicated to specify the voltage required to operate a machine.

Vac.
Abbreviation for vacuum.

Vacuum
A void, space without matter.

Watts Max.
Maximum electrical power consumed by a machine.