Central Vacuums -
Information
The History of
Central Vacuums: There are, today, a
considerable variety of Central Vacuums available for home and office use. The
Central Vacuum System (CVS) industry in the United States has, essentially, come
from Canada where almost 85% of homes have CVS - in the USA the amount of CVS
installed in homes is still relatively small. In the 1980s a variety of
existing American vacuum
manufacturers
decided to infiltrate the growing CVS market and, with the inclusion of their
products and additional advertising, the public awareness of CVS increased. In
addition to these new CVS manufacturers swelling the ranks, additional Canadian
CVS manufacturers occasionally choose to enter the United States market; and,
thus, the choice of CVS for the consumer is steadily growing.
The Nature of a CVS:
A Central Vacuum System in its inherent
design performs like a traditional canister vacuum. This is to say that a CVS
provides cleaning power (suction & airflow) by means of a motor - or, in some
systems, two motors - located in the main canister. This cleaning power is made
available throughout a house (or office, etc.) by means of plastic (PVC) tubing
(usually PVC - sometimes metal is used) located inside the existing walls,
ceilings & floors of the house which is ducted to various CVS outlets into which
a vacuum hose can be inserted. Thus, in normal usage, the user inserts one end
of the hose - usually 30 feet to 35 feet long - into the CVS wall outlet and the
CVS obediently turns on. Some hoses incorporate switches on the accessory end
of the hose that enable the CVS to be turned on or off from the hose; rather
than plugging or unplugging the hose from the wall outlet. On the other end of
the hose can be mounted various, traditional cleaning accessories such as dust
brush, crevice tool, upholstery tool, wands & rug nozzle, etc. As well,
revolving brush accessories can be used for cleaning carpeted surfaces.
Locations of CVS
Outlets: The CVS outlets are normally
located by the installer - usually after consultation with either the homeowner
or the builder (or architect) - in judicious locations in particular areas of
the house to maximize the use of the CVS hose in that area to clean as much as
possible before
relocating
to another CVS outlet. Thus, in a wing of the house with three bedroom there
might possibly be only one or two CVS outlets in a common hallway - not
one in each bedroom, etc. It is common in the average-size house (2,000 to
3,000 square feet) to have 3 to 5 CVS outlets.
Types of CVS
Outlets: CVS outlets come in various types
and colors. Most common today are plastic CVS outlets although metal is still
used. Usual colors are the traditional white or ivory. Most CVS outlets are
wired with low-voltage relay wiring which carries 24 volts to the outlet from
the main CVS canister's relay. Then, either when the CVS outlet door is opened
or when the hose end is inserted into the CVS outlet the relay on the main
canister switches the vacuum on. Sometimes CVS use wireless methods to activate
the main vacuum unit; however, this is usually the exception rather than the
rule.
Some CVS outlets are also wired with 110 volts. In this instance, a small 110V
receptacle is included in the CVS outlet immediately adjacent to the round
opening on the CVS outlet into which the hose is inserted. The end of the hose,
then, is designed with a small set of 110V prongs which plug into the
corresponding 110V receptacle on the outlet. This provides 110V through the
current-carrying CVS hose so that a motorized nozzle head can be used to clean
carpeted surfaces. This design eliminates either separate extension cords or
pigtail extensions off the end of the hose which would then be necessary to
power the nozzle head.
Types of Central
Vacuum Systems:
- Cyclonic
- Cyclonic systems use a cyclonic design to spin
the air inside the dirt chamber. This creates centrifugal force and is an
effective way to maintain the airflow of the CVS which is critical to
maintaining the cleaning efficiency. The dirt is thrown to the outside of the
dirt chamber and then slides down into the bottom of the container.
- The downside to a standard cyclonic design is
that the smaller dirt particles are not effectively thrown to the outside of the
dirt chamber through centrifugal force simply because they weigh less than the
larger particles. These fine dirt particles exit up through the motor and back
out into the atmosphere. Many CVS are vented outdoors for this reason of dirt
leakage. Since the motor(s) is getting dirty, it does not last as long.
- (Paper) Bag
- The advantage to a (paper) bag system is that
the bag acts as a filter, and the air exhausting through the bag is being
cleansed of dirt particles.
- The disadvantage of a (paper) bag system is that
as the bag fills with dirt the airflow of the CVS reduces, thus impeding
efficiency.
- Cyclonic w/filtration
- A cyclonic design with proper filtration offers
the best of both worlds:
- The cyclonic design maintains cleaning power
extremely well
- The filtration ensures that the air is being
cleaned before entering the motor(s) & before being exhausted back into the
environment
- The better units of this design will filter to
as small as .1 micron
Size & Power of CVS:
CVS come in different dimensions and power
ratings to provide effective cleaning efficiency in various sizes of
environments. In most standard, in-home installations the need is to have a
fairly large dirt chamber. Some CVS have quite small dirt containers and thus
the cleaning power can be quickly reduced as the dirt chamber begins to fill.
- A proper dirt chamber size
for normal home use is 6 - 8 US gallons
- This is large enough to help maintain the
cleaning power without premature emptying.
The power/efficiency of
a CVS is directly connected to the size & type of motor - or, motors - that
is/are used:
- Many CVS motors are 5.7 inches in diameter &
have two fans
- Some motors are 5.7 inches in diameter & have
three fans
- In given size motors with the same amperage
rating & design each additional fan increases the cleaning power
- Some motors are 7.2 inches with two fans
- Some motors are 7.2 inches with three fans
- Larger (7.2 inch) motors generally provide more
airflow than their 5.2 inch counterparts
- Larger (7.2) motors turn more slowly than their
5.2 inch counterparts and thus last considerably longer
- The best motors are always 7.2 inch in
diameter
- Some of the more powerful CVS sometimes use two
motors rather than one motor
- A twin motor CVS usually has two motors in
series
- The second motor intakes the air exhausting from
the first motor - i.e., one motor is directly after the other motor
- Such a design doubles the suction power
(waterlift in inches) while the airflow remains the same
- Some twin motor CVS use two motors in
parallel
- The two motors each pull air through a common
intake
- Such a design doubles the airflow (cfm)
while the suction remains the same
Types of Cleaning
Accessories: The same types of accessories
used on portable (canister) vacuums are available for CVS use:
- Hose
- Non-electrified for traditional accessory use
- An electric power nozzle can be used via a
special extension cord with a non-electrified hose
- Electrified for power nozzle use - one of two
usages
- Either totally self-contained wiring using a
"direct-connect" design
- Or, exterior electric "pigtails" for connecting
either to a traditional 110V wall outlet at the "vacuum end" or the power nozzle
at the "tool end"
- 1 1/4 inch diameter hose in electrified or
non-electrified
- 1 3/8 inch diameter hose in electrified or
non-electrified
- 1 3/8 inch hose carries air better as it is
slightly larger
- New, stretch hoses non-electrified
- A 6-foot hose stretches to 20+ feet for quick
cleaning jobs
- Accessories
- Dust brush
- The best ones usually have horsehair bristles
- Horsehair won't scratch like nylon bristles
- Crevice tool
- Upholstery tool
- Bare floor brush
- The best ones usually use horsehair bristles
- Rug tool
- Combination rug/floor tool
- Convenient to quickly go from rugs to bare
floors
- Air-driven "turbo"
upholstery or rug tools
- Utilizes the airflow from the CVS to spin a
revolving brush via a turbine in the tool
- "Steals" the airflow - and thus considerably
lowers the overall cleaning efficiency - of the CVS
- Eliminates cords & electrical connections
- NOT a recommended accessory
- Electric rug (or upholstery)
nozzles (power heads)
- Necessitates electrical connections
- Convenient with electrified hoses; less so
without such hoses
- Maintains the CVS airflow - and thus the
cleaning efficiency - because the cleaning aperatures remain fully open
- The only proper method of utilizing a revolving
brush head
Do-It-Yourselfers:
We welcome do-it-yourselfers and will provide them with everything necessary to
install their own CVS including free advice & the loan of a video showing a
typical installation
We install: We
have been installing CVS since 1975 and offer fast, expert installation at
competitive prices.
Free Quotes:
Simply call, fax or e-mail us for a free quotation.
We install in new and existing construction in New Jersey, and parts of New
York and Pennsylvania - we do not install out of the tri-State area; although,
we are happy to provide you with the product for out of State use.
Click here
to go to our webpage on Central Vacuum System Suggestions
