The Need of an Exhaust Fan
Whether it's in an office or a factory, a laboratory or an auditorium, a bakery or an kitchen,
the air that we breathe gets stale and heated with time-making the place uncomfortable and unhealthy. The heat gets
unbearable, the steam or smoke highly irritating. What is then desperately needed is an improved air condition or
adequate number of air changes. This is obtained only through powered ventilation - an Exhaust Fan. It squeezes out
polluted air and allows inflow of cool and fresh air - in a double-action way. Features
The EPC Exhaust Fan is provided with capacitor, start and run induction motor of robust construction, totally
enclosed, continuous rated type and specially designed for fan duty. Direction of rotation can be changed simply by
interchanging connections of the stator windings. Conforms to I.S. Specifications No. 2312/1967 and is generally
provided with class 'A' insulation; class 'E' insulation can be offered to meet special requirements. Fan motors
have two ball bearings adequately lubricated
The largest range of I.S.I. marked exhaust fans in India
EPC Exhaust Fan has the widest range to cover and suit your requirement from 230 mm (9") to
900 mm (36") in both single and three phases.
How To Install
|Exhaust Fan-The Way To Install
Positioning of Exhaust Fans is an important factor in ventilation.
Wrong positioning will make installation meaningless. Fans should be installed away from the air - paths or
inlets as far as possible, enabling them to draw out polluted air and draw in fresh air quickly. Fans should
be placed high on the wall - opposite to the air - inlets, for being polluted, the warm air starts rising.
Placing them near doors or windows will cause air movement to be short circulated between the fans and
adjacent inlets - keeping part of the room unventilated (see illustration above). It is preferable to use
combination of small and medium sized fans than one large fan.
EPC Exhaust Fans can be supplied with special mounting arms (but
without rings) to function against resistance. This helps radial flow from
the wing tips - reducing back flow losses and increasing pressure development. The ring mounted fans give
maximum volume under free air flow conditions while the diaphragm mounted fans give maximum volume under
free air flow conditions while the diaphragm mounted fans work against resistance.
Fans, exposed to weather, are subject to moisture and dust - laden
atmosphere-- necessitating special protective treatment. As required, EPC Exhaust Fans can be coated with
epoxy paint or chlorinated rubber paint for protection against corrosive atmosphere. While working in
moisture - laden atmosphere,the motor winding may absorb water causing damage to motor insulation. The
Fans can provide special impregnation of motor windings, protection against ingress of water and guarantee
protection against ingress of water and guarantee protection of all interior and exterior
Protection For Impeller
The motor and impeller sides of EPC Exhaust Fans may be provided with strong
wire guards. Motor side guard fits over mounting arms while impeller side guard
fits into the orifice in the fan ring or diaphragm.
Regulators may be supplied for use with 230 mm , 300 mm, 380 mm, 450 mm, 600
mm, single phase fans. They have four speeds, are metal clad and of auto -
transformer type for 450 mm 1400 r.p.m. and 600 mm 920 r.p.m. fans and of choke
type for others. Electronic Stepless Regulators can also be supplied with all
single phase fans.
These are made of aluminium, fitted into a steel frame with four fixing lugs.
They are opened by fan draught and closed by gravity when the fans are switched
They provide an effective protection for fan outlets in exposed position. They
protect the fans from weather and prevent opposing winds to restrict fan
output. Reduction in delivery of free air due to fixing flanges. They are
strong and coated with anti - rust paint.
EPC Exhaust Fan has the widest range to cover and suit your requirement from
230 mm (9") to 900 mm (36") in both single and three phases.
Fans, of all sizes, are packed in cartons - Fan Motor in one, Impeller Fitment
in the other. Instructions regarding installation of electrical connection are
given with each fan.
EPC's is the only
Exhaust Fan in India having its full range certified by the Indian Standard
EPC Exhaust Fans Play A vital Role
Ventilation in a factory is a
delicate problem. Serious air pollution from excessive heat, smoke and dust affects the general
health, overall efficiency and output in a factory. EPC Exhaust Fans will solve this
Many badly planned public auditoriums become hot and stuffy immediately after their doors are
closed and the show begins . Ceiling fans or air circulators cannot ease this situation except
Most cafeterias lack proper ventilation--cookingodors
and steamy - muggy air float
constantly. It is desirable that EPC Exhaust Fans should be fitted here to enable people to eat
their food at ease.
Although banks in metropolitan cities are betterventilated, it's not so
in towns and villages . The hectic working pattern in banks require hygienic and comfortable
working condition - ensured only by Exhaust Fans.
A library room should be airy and
damp - proof as possible both for the health and hygiene of library users and thousands of
books stored therein. EPC Exhaust Fans protect it from moisture, pollution and
Our kitchen and toilet are often gloomy and stuffy with insufficient air inlets. They
need minimum 10 to 20 air changes per hour. EPC Mini Exhaust Fans
eliminate malodor and stuffiness.
Besides general ventilation, EPC Exhaust Fans are
widely used in Room Coolers - the most effective and economical device used in dry and low
humid climates to keep houses and working places cool
andcomfortable. The 450 mm (18") single phase 720 r.p.m. and 920
r.p.m. fans are ideal for domestic purpose and 600 mm (24") 720 r.p.m. and 920 r.p.m. for large
Room Coolers in cinema halls, restaurants, etc. Simple enough, one can make such a cooling unit
at home at a very low cost.
|Air Change-The Sole
Air change is thus the most vital factor for an environment. Varying from location to location,
it depends upon the surrounding, the number of people working and also the nature of work. A
bank or an office requires much less air changes than a foundry or a boiler house. The table
shown is a general guide. To determine the number of Exhaust Fans required, multiply the
cubical content of room (length x width x height) in metre or feet by the number of air changes
required and divide the result by air delivery of fan (see table).