Air Flow: Quantity, air volume which circulates within the 2’’ (50,8 mm) PVC pipe within a given period.

Air Watts: a) Actual cleaning power b) Electricity consumed, less the dissipated heat c) Combination of suction and airflow at a given opening size.

Amp. Max.: Electrical current, in Amperes, maximum requested by the device.

By-Pass: Propriety of certain vacuum motors, which are cooled via fresh air intake by an independent fan air cleaner. You will normally find these in two (2) categories: tangential evacuation & peripheral evacuation.

Cyclonic: Filtration method whereas the air is separated from its dust particles by a cyclonic action and centrifugal force within the debris canister of the central vacuum power unit. Dirt is thrown to the perimeter while the air is relatively free of particles discharged from the center. Because of natural gravity, particles heavier than air are drawn towards the bottom of the canister. Some manufacturer still only uses this primary method of filtration, while the majority while the majority use additional filtration to improve the overall efficiency of the filtration.

Ft3/m: Abbreviation of «cubic feet per minute» air volume displacement unit.

HEPA (High Efficiency Particulate Air): Filtration method specification developed by the ‘’Atomic Energy Commission’’ in the Second World War to prevent radioactive particles to penetrate in nuclear factories and protection shelters. A HEPA filter must retain all particles as small as 0.3 microns in size with an efficiency of 99.97%. A HEPA filter is known as non-reusable and disposable, it will clog faster than other filtration method and offer a high resistance to airflow unless you have a very large surface.

l/Sec.: Abbreviation of «liter per Second » air volume displacement unit.

mBar: Abbreviation of «milli-bar » pressure unit = 1/1,000 of one Bar.

Micron: Length unit «micrometer » = 1/1,000,000 of one meter.

m3/h: Abbreviation of «cubic meter per hour » air volume displacement unit.

Piping: Ensemble of rigid 2’’ PVC vacuum pipes and fittings mechanically assembled and welded with PVC solvent which runs to specific location of the building between the central vacuum power unit and the vacuum valves.

Peripheral evacuation: Propriety By-Pass of some vacuum motors to evacuate air through openings around the fan housing. For exhausting air and the heat accumulated in the engine compartment, one or more openings should be carried therein.

Polypropylene filter: The polypropylene used by Nadair is composed of a laminated structure (SMS) of polypropylene micro-fibers Herculon™. it retains very fine dust particles of 0,1 micron with an efficiency to 97.5%. The evacuated air is virtually clean! Venting to the outdoors is recommended but not absolutely necessary. The filter is washable and can be dried in the machine, it is reusable for several years.

Spun aluminum: Manufacturing process which an aluminum disk is spun shaped to obtain a single piece seamless deep vessel without welds. The Nadair debris container and motor cover are fabricated with this process, no air loss, no loss of vacuum pressure, the material is lightweight, resists corrosion resist, will not burn and will not create a static electricity build-up.

Suction power in H2O: Height, inches or in mm to which a central vacuum power unit can draw water into a 2’’ (50,8mm) column, and maintain at that height.

Tangential evacuation: Propriety of certain By-Pass vacuum motors to evacuate the vacuumed air through a tangential pipe extension on the motor blower housing itself. Excelling for evacuating air and heat from the motor housing. These engines are generally preferred, but their cost is a bit more expensive and are a bit noisier.

PVC: Polyvinyl chloride, thermoplastic material very resistant and easily be stained, used in the fabrication of pipe and fittings systems for central vacuum system. Usually the material color “white” is made with virgin resin and better. PVC is also often used in the manufacturing of flexible hoses and cleaning tools.

Thru-flow: Propriety of certain central vacuum motors which are cooled by the vacuumed air moving through the motor itself. Generally these motors are quieter.

VAC: Electrical potential measuring unit, Voltage in Alternative Currant, normally referred to specify the voltage required to operate an electrical appliance, 110-120 VAC nominal in North America and 220-240 VAC nominal in Europe.

Vac.: Abbreviation of «Vacuum ».

Vacuum: Empty space without matter

Watts Max.: Maximum energy consumed by the appliance when in use.