Use fans of high efficiency and designed to operate at optimal rate
Best Available Technique (BAT)
BAT is to optimise heating, ventilation and air conditioning systems.
Brief technical description
Fans are the principal source of electricity consumption in the installation. Their type, size and controls are major factors from the point of view of energy. Note: choosing a high efficiency fan of the correct size may mean that a smaller fan can be chosen and savings on the purchase price can be obtained. When designing or modifying an installation, key issues are:
- a fan with a high efficiency rating: the maximum efficiency of fans is generally between 60 and 85 % depending on the type of fan. Manufacturers are developing ranges of even more efficient fans
- a fan designed to operate as close as possible to its optimal rate: with a single fan, efficiency can vary according to its operating rate. It is therefore essential to choose the correct size of fan for the installation, so that it operates as close as possible to maximum efficiency
- fit fans where there is a variable flow with an electronic speed control (ESC)
- install high efficiency fans
- install fans with an optimum operating rate that suits the specific needs of the installation
Achieved environmental benefits
It is estimated that 10 % of the electricity consumption in companies is by ventilation systems. Where there is also air conditioning, ventilation and air conditioning can take up an even larger share of the corporate energy budget.
Applicable to all existing systems.
In most audited installations, potential energy savings of up to 30 % consumption have been detected. There are many possible actions giving a return on investment often within two years.
Driving force for implementation
- health and safety conditions at work
- cost savings
- product quality.