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Easy Brush Roller Removal – Quick brush cleaning or replace-
ment is easy, and no tools are required!
Advanced, Brush-roller Technology – The DAVID
®
PRO-DX
brush roller is uniquely designed to funnel hair and debris into
the power head’s airflow channel, which improves vacuum
cleaning performance on all flooring surfaces.
Vacuum Motor – The DAVID
®
PRO-DX has a 1300 watt motor.
Lifetime Belt Warranty - No more changing belts...they should
last the life of the machine!
Changing Bags is Easy and Clean – DAVID
®
PRO-DX filter bags
can be changed in just a few seconds, and a hygiene cap keeps
dust sealed inside during removal and disposal.
Bagged vs. Bagless . . . Bags are Better! – Top-fill, three-layer filter bags are
an integral part of DAVID
®
PRO-DX’s filtration system because they hold virtu-
ally all the dirt captured by the vacuum, which improves the effectiveness and
useful life of the microfilters. They also ensure continuously strong suction
because dirt enters from the top, deposits at the bottom, accumulates upward,
and air exits through the sides, which allows unimpeded airflow as they fill to
capacity. And they can be tightly sealed with a hygiene cap when full, so no dust
can escape into the air during bag removal and disposal.
In contrast, without bags to hold nearly all the captured dirt, the microfilters
on bagless vacuums quickly clog from excessive dirt build-up and must be
replaced often, or a loss of suction and cleaning effectiveness will occur. In
addition, dust and other allergens become airborne when emptying bagless
dirt containers. Lastly, bagless vacuum microfilters are expensive, usually
costing more than a multi-year supply of DAVID
®
PRO-DX filter bags.
S-class, Pre-motor and/or Exhaust Microfilters – S-class, Pre-motor and
Exhaust Microfilters (S =“Schwebstoff” = airborne particles) are made from
electrostatically charged, micro-fiber material, which attracts and captures
dust particles from the airflow of the vacuum before and after it passes over
the motor to cool it. Cooling the motor with super-clean air increases motor
life and reduces the possibility of maintenance, even after many years of use.
Also, the exhaust air is cleaned to the highest level before being emitted from
the machine. The S-class Standard requires filters to absorb greater than
99.9% of particles down to 0.3 microns in diameter. For comparison, 100
microns is the diameter of a human hair. Their advantages are a relatively open
texture that allows smoother airflow for better suction performance, a longer
life expectancy, and they cost less than HEPA filters.
Tightly Sealed Vacuums Ensure Effective Filtration – Dirty air, which flows
through a vacuum, can only be filtered completely if it does not escape into the
room through seams or seals in the machine. The DAVID
®
PRO-DX vacuum has
tight seals throughout.
Many vacuum companies with high-filtration claims are actually quoting spec-
ifications made by the manufacturer of the filter material, as measured in the
laboratory, not the filtration effectiveness of the vacuum itself while operating.
Whether or not dirty air can escape through leaks in the body of the machine is
not considered. The filtration effectiveness the DAVID
®
PRO-DX vacuum is test-
ed while it operates
Reliable, Commercial-grade Components – The DAVID
®
PRO-
DX vacuum is constructed with thick, reinforced, ABS plastic,
aluminum and metal parts, steel axles and bearings, and high-
end, quality motors. Therefore, DAVID
®
PRO-DX users own
reliable, long-lasting vacuum cleaners. Competing vacuums
are made with thin, flimsy, inexpensive, plastic materials, none
of which are reinforced, and typically have useful lifespans of
one or two years.
Save Money! DAVID
®
PRO-DX Vacuums Last for Years and
Extend Carpet Life! – If properly maintained, DAVID
®
PRO-DX
vacuums save ordinary, residential users hundreds of dollars,
by providing excellent performance for ten to fifteen years or
more, and their deep-cleaning, power-brush technology
extends the life of carpets. Typical vacuums perform poorly,
even when new, and usually do not last beyond two years. So
six or seven “disposable vacuums” must be purchased during
the average life expectancy of just one DAVID
®
PRO-DX
DAVID
®
PRO-DX FILTRATION SYSTEM