From Ventilation Service
Ventilation systems provide the means to distribute air within a building in order to maintain indoor air quality. In addition to controlling temperature and humidity other elements constitute a functioning indoor climate. The air needs to be constantly processed to remove dust, dilute odors, and, provide fresh outside air to replace the carbon dioxide that builds up in spaces where people gather.
How it works
Metal ductwork, along with a controllable series of dampers and actuators distribute intake air as necessary to maintain indoor air quality.
Buildings generally last much longer than their originally intended use - occupancy patterns change with new tenants, air safety standards evolve, and in some cases ventilation demands are drastically altered, like accommodating food service in what was formerly office space. These changes can result in building ventilation that no longer serves the occupants needs, requiring a change in the air balance, distribution system or specialized components.
The components of an efficient ventilation system are:
- Fresh air - Although some outside air is needed to replace the stale air that accumulates in a building, pushing a high volume through the building is the “brute-force” method for creating satisfactory indoor air quality, and is also by far the most expensive. During long cold winters, this translates into a high consumption of energy to preheat the fresh air to the indoor temperature. Targeting fresh air into zones based on occupancy patterns and Co2 levels can cost effectively achieve required indoor air quality.
- Filtration - Effective filtration can significantly improve air quality. Choosing the right material and filter size is critical in maximizing the collection of airborne pollutants. Recognizing that the installation must provide safe and easy access for maintenance ensures that the system remains effective and operational over a buildings lifecycle.
- Dust Collection and Source Capture - Typically associated with manufacturing, this is filtration on an industrial scale. Collecting dust or larger particles at the point where they are generated insulates the larger building system from the extra task of filtering the byproducts of that process. This not only results in a smaller investment, it can often carry the additional benefit of lower maintenance with self-cleaning or centrifugal particle collection systems. Source Capture systems such as arm collectors near welding stations or closed room work environments with built in collectors (ex. paint booths) ensure that toxic byproducts from production do not leak into the indoor air supply.
- Pressurization - Controlling the movement of air can be very effective in isolating zones that require extra attention. This demands an understanding of the whole building in order to retain a delicate balance with all fan systems working in concert. This can reduce the cost of dealing with a small zone within the building. Restaurant kitchens, areas within hospitals and laboratories are prime examples of areas that require containment through pressurization.
- Ensuring that a buildings indoor air quality complies with government regulations and industry best practices
- Allows zone control in order to match higher air flows with higher occupancy
- Properly Balanced Ventilation Systems reduces the additional load on existing heating & cooling systems, by properly distributing generated heat and cooling
- Proper Ventilation controls building pressures reducing air infiltration. This prolongs the life of the building envelope while maintaining comfort.