orderForm.noItems Selection Selection

One of the key factors in influencing the choice of fan coil unit for offices, hotel bedrooms and apartments, is noise. The selection of fan coil units is governed not only by the thermal and air volume rates, but also by the constraints of noise levels permitted in the room spac e.

During the preliminary design stages, not all the room conditions may be known, but certain assumptions allow room noise levels to be approximated. Factors that help the predicted noise levels include: the volume of the room space itself; surface area and materials used; reverberation time within the space; insertion loss of the ceiling to be used, and type of discharge grille and its position within the room. In addition, an understanding of any further sound attenuation and return air path will help to predict the noise levels to be expected.

Noise level assumptions are generally based on an observer positioned 1.5 metres from the noise source.

All Dunham-Bush fan coil units are compliant with current legislation, including EMC Directive, LVD, Machinery Directive, ErP Directive.

BMS compatibility c ontrols can be integrated with high quality EC external rotor motor or shaft motors driving all metal fans, allowing the BMS to modulate the fan speed to the minimum of energy consumption and noise necessary to achieve comfort. Recent resear ch has indicated that VAV fan coils can match the energy efficiency of active chilled beams, whilst not being constrained by the need to inhibit the unit should the humidity in the space be too high. A comprehensive range of optional inlet and discharge acoustic attenuators are available for applications where exceptional low noise levels are required but thermal duty remains high, such as prestigious or special application rooms, high reverberation time spaces, spaces with no ceiling.

Condensate trays are provided for the collection of condensate and disposal of water from the cooling coil and valve assembly. To reduce the possibility of harbouring legionel la bacteria or other bacterial or fungal contamination, Dunham-Bush FCU trays are designed to prevent ‘pooling’ of water by grading the tray in two dimensions to the drain connection outside the air steam. Condensate drains can connect to either a gravity drainage system or to a

condensate pump to lift the condensate to a suitable drain point or system. Most condensate pumps have a set of integral volt free fail-safe alarm contacts to allow users to be alerted and prevent flooding in the ev ent of pump failure, if used corr ectly .

Maintenance and access aintenance and access

Possibly a point that we are all aware of but still worth remembering is that all fan coil units need occasional maintenance and inspection. Therefore, consideration should be given to leaving good access to units installed in ceiling or a void with sufficient space to change air filters and allow periodical cleaning of fans and condensate trays.

Quality sy uality system

To maintain exceptional standards in design, product quality and service, Dunham-Bush operates a quality management system to BS EN ISO 9001:2015, which is accredited by the British Standards Institution.

Q powerful uiet,


Dunham-Bush fan coil units are built in the UK to no-compromise engineering standards, using only the most modern and reliable components available. Combined with the very latest design and manufacturing technology, they provide the ideal solution to meet precise thermal and noise criteria.

• Quiet, powerful operation • Energy effi cient • Fast simple installation • Easy access for maintenance • Extendable condensate pans • High quality EC fan motor assembly

• Comprehensive range of models to meet most heating and cooling requirements

• Proven acoustic and thermal performance To learn more

F AN COIL U N I T To learn more about Dunham-Bush

FA N heat emitters contact us today

C O I L UNIT S re about Dunham-Bush

Fan coils




Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40