The EPIC fan coil range provides the designer with the opportunity to achieve very low specific fan power levels (SFP). This is becoming an increasingly important issue as successive building regulations slash the allowable total carbon emission from a building.
Display Energy Certificates (DEC) show the specific buildings carbon emissions as calculated by approved software. The appearance is similar to the energy labelling of domestic electrical appliances. If a similar labelling system was used for individual components in an air conditioning system the ratings for fan coil units could look like the label below.
The unique horizontally mounted ECM motor gives many benefits which may be summarised as follows:
For the last 40 years virtually all fan coils have been constant fan speed and consequently constant air volume (CAV). Any changes in cooling or heating were adjusted by the water valve, i.e. varying the water volume.
However with the fans running at full speed all of the time this is a needless waste of energy. By varying the air volume, significant reductions in energy can be achieved and typical values for a wide range of constant and VAV fan coils is shown in the energy comparison graph
SFP is a measure of how efficiently the fan moves the air over the heat exchangers within the fan coil unit. Below is a simple tabulation:-