Mechanical Ventilation
Whether you are building your factory or taking care of the one you are in now, good ventilation is important. It helps protect your health. Studies show good ventilation is critical to your comfort and safety. Proper ventilation supplies fresh air to your work place and dilutes or remove stale air. Ventilation is defined as the intentional movement of fresh air from outside a building to inside. If there is something burning more oxygen is replaced by carbon dioxide. The purpose of the chimney is to move air from inside to outside. It causes infiltration or natural ventilation. An efficient means of extracting warm and stale air is through roof mounted turbo ventilators which create positive draft.

What is Ventilation

Ventilation is defined as the intentional movement of fresh air from outside a building to inside. If there is something burning (a fireplace, gas heater, candle, oil lamp etc.) more oxygen is replaced by carbon dioxide. The purpose of the chimney is to move air from inside to outside. It causes infiltration or natural ventilation. The resulting negative pressure change induced in the building typically causes a flow of air to move into the building. Continuous air circulation is necessary to keep the interior healthier. Lowering the concentrations of indoor air pollutants in your work place is to be done by increasing the amount of outdoor air coming in.

Importance of Ventilation

Ventilation in a structure is important to remove water vapour formed by respiration, burning and cooking. It is required for removing odours, e.g., from a toilet or kitchen. If water vapour is permitted to accumulate, it may damage the structure, insulation or finishing. It is reported that improper ventilation is the cause of about half of all indoor air quality problems in your work place.

Ventilation is becoming a point of major concern for industrial workplaces and factories due to the fumes, gases, vapours and heat generated. In natural ventilation, air moves through opened windows and doors. Air movement associated with infiltration and natural ventilation is caused by air temperature differences between indoors and outdoors and by wind.

Equipments to Handle Ventilation

Turbo Ventilator
There are a number of mechanical devices that help steady ventilation. Generally exhaust fans are used to remove air from rooms, such as bathrooms and kitchens. There are air handling systems that use fans and duct to continuously remove indoor air and distribute filtered and conditioned outdoor air to strategic points throughout the work place. When there is little infiltration, natural ventilation, or mechanical ventilation, the air exchange rate will be low and pollutant levels will increase.

But most heating and cooling systems, including forced air heating systems do not mechanically bring fresh air inside. Opening windows and doors, operating window or attic fans, when the weather permits, or running a window air-conditioner with the vent control open increases the ventilation rate. Local bathroom or kitchen fans that exhaust outdoors remove contaminants, including moisture, directly from the room where the fan is located and also increase the outdoor air ventilation rate.

Ideal work places should have some kind of mechanical ventilation to remove pollutants. Whether a mechanical ventilation systemd makes sense in your existing homes depends on the house, your existing heating, ventilation and air circulating systems.

Turbo Ventilators

Turbo Ventilators are mechanical devices to handle continuous air-flow. Generally it operates utilizing energy of the wind to induce airflow by centrifugal force. The centrifugal force created to pull up the fresh air in the turbines towards the spinning vanes and out of the turbine. The airfoil vanes pick the wind at the windward side creating continuous airflow increasing proper ventilation.

The wind driven turbo ventilators are used in developed countries because its initial capital cost is very low. These turbo ventilators have adaptability, high capacity per vent. They are more reliable than any other ventilation system. The Turbo Ventilator is designed to withstand a high wind velocity in different weather conditions. It is made of stainless steel or aluminium, therefore virtually maintenance free for more than ten to fifteen years.

Benefits of Turbo Ventilators

Turbo Ventilators operate on wind energy thereby enabling substantial saving in electrical energy to the user. It makes use of a renewable source of energy, i.e wind energy. Since these ventilators are maintenance free for more than ten years they are cost effective also.

Turbo Ventilators help healthy living, reduction in maintenance of plant & machinery, using renewable source of wind energy. In the long run they increase productivity and life of roofing sheets.

Importance of Roof Mounted Ventilator

As a general rule, hot or stale air will not exhaust through an opening into which wind is blowing. Therefore, regular static ventilators are often found useless. They allow outside wind to enter in the shed because of poor design or location on the roof. They cannot be expected to exhaust.

An efficient means of extracting warm and stale air is through roof mounted turbo ventilators, which create positive draft. Adequate low level provision for the entry of fresh air at normal temperature and pressure should be provided. Well designed turbines ventilators exhaust hot and stale air. They also help providing continuous air flow resulting in effective air changes per hour for the building.

While the electric, powered ventilators work on electricity high running cost on power is required while the wind turbo ventilator costs zero running costs. Moreover, since the turbo wind ventilators are installed in rooftop, it ensures uniform ventilation.

Sreelakshmi Traders, Chennai, established in the year 1977 is the sole distributor of 'ARVEN' Wind Turbo Ventilators in India. They are also dealers in all kinds of speciality self adhesive tapes and packaging materials. At present, they are distributors for M/s. Maharashtra Plastic & Industries, Daman, M/s Tesa Tapes India Pvt. Ltd., Mumbai and M/s Patkar Extrusions, Ankleshwar. From the year 2001, they have started marketing 'ARVEN' Wind Turbo ventilators which are mainly used by Industries.

MGS Architecture May-June 2010

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