FILTER-ON units are equipped with inbuilt high voltage power pack, so it does not required High Voltage Supply. The units require standard single-phase 230-v AC 50 Hz supply. The power pack in the unit converts this incoming supply to the required high voltages.

Maximum high voltage generated in 12 kv DC, which is the range of voltage which is used in many household appliances also like Television sets, PC etc. However all the care is ensured in design and manufacturing to completely eliminate any possible hazard.

The access doors of the units are fitted with door safety switches so that the supply get immediately cut off, when any door is opened. Also the body of the unit is connected to ground. The high voltage components are designed to withstand short circuit loads and the controlling circuit ensures proper regulation of voltages in routine operation as well as short circuit operations.

As such virtually there are no hazards / risks regarding the high voltage in FILTER-ON units.

Any type of particulate matter even up to 0.01 micron size can be filtered in FILTER-ON units. Therefore all the typical indoors as well as industrial pollutants such as smoke/fumes/mist/fine suspended particles etc. are effectively captured in FILTER-ON units.

FILTER-ON Electrostatic Precipitator type air filters offer major technical advantages over conventional, mechanical / media type filter such as -

1. Higher filtration efficiency even for very fine sub-micron particles -
Most of the media type mechanical filters offer good efficiency for 5 micron and above dust particles. However more than 90% of the particles in air are below. 1 micron size. Thus theses mechanical filters only filter out fraction of total particles present in the air stream and thus are not effective enough to control indoor pollutants.

On the other hand FILTER-ON unit offer very good filtration efficiency even up to 0.3 micron size particles.
55 - 60% Filtration efficiency for 0.3 Micron size.
70 - 75% Filtration efficiency for 0.5 micron size.
98 - 99% Filtration efficiency for 5.0 micron size.

As measured on Laser Particle Counter

Thus FILTER-ON provides very effective solution for air filtration in terms of better filtration for finer/sub micron size particles which forms major percentage of air stream.

2. Very low Pressure Drop -
As compared to the mechanical filter which offers similar efficiency range as that of FILTER-ON ESP type air filter, the value of total pressure drop across filter is less than half for FILTER-ON units as compared to mechanical filters. With pre & after filters value of pressure drop is max. 8-10 mm for FILTER-ON units. Thus a lot of power saving is achieved due to lesser load on blower-motor as compared to mechanical filter.

3. Life of Filter -
Since FILTER-ON ESP type air filters are made of Aluminum electrode plates, it is cleanable, reusable filter and no replacement is required. Thus this type of filter has got infinite life which is the most significant advantage.

Since the unit works on high voltage, it cannot be used in fire hazardous area, inflammable type fumes such as petroleum and oil refineries as well as VOC (Volatile Organic Chemicals) type - pollutants.

Proper earthings is required to be provided to the unit for any maintenance work, first it is required to switch off the incoming supply to unit. Then after waiting for 5 -10 min. the access doors are to be opened. It is also required to short the High Voltage terminals so as to discharge the residual charges if any in the unit should be handled by Electrical Engineer / Electrician having knowledge of handling H.V. Sources.

Depending upon application and concentration of pollutants, it is required to clean the ESP type filter cell periodically. It is advisable to follow a preventive maintenance schedule for this activity. Also other checks of indications, electrical components required to check once in a month so as to ensure trouble free operations of the unit.