Wall Mounted AirMaster Heat Recovery Ventilation Units

Great care has been taken with the casings of AirMaster units. Any exposed panels are of streamlined design so as to fit in discreetly with ceiling lines.

For rooms with a suspended ceiling, AirMaster units can be recessed 1/3 or 2/3 into the void space. With each of the variants, the unit internals are reconfigured so as to always keep the supply air grille next to the ceiling surface. This allows the Coanda air distribution effect to be maximised, regardless of the degree of recessing.

Wall mounted units are available in 5 sizes, with ratings and usage as follows:

AirMaster AM 150airmaster-am300-wall-mounted

147 m³/hr with 35 dB(A) @ 1m,
or 115 m³/hr with 30 dB(A) @ 1m.

The AM 150 is the smallest unit of the AirMaster decentralized heat recovery ventilation range. This heat recovery ventilation unit is well suited to individual offices. It can be partly recessed in the ceiling void (as shown on right), reducing visual impact to the minimum.

AirMaster AM 300

300 m³/hr with 35 dB(A) @ 1m (290 m³/hr net of loss through external louvres)
or 240 m³/hr with 30 dB(A) @ 1m.

This decentralised heat recovery ventilation unit is a useful choice when designing for partitioned spaces with higher ACH
(air changes per hour), such as medical treatment and consulting rooms, offices and smaller meeting rooms. With normal office conditions, it would be good for up to 8 people. For those applications involving landlocked offices away from external walls, all units larger than AM 150 in the AM range can provide ventilation using external duct runs of up to 8m.

AirMaster AM 500

550 m³/hr with 35 dB(A) @ 1m (510 m³/hr net of loss through external louvres),
or 450 m³/hr with 30 dB(A) @ 1m.

Catering for up to 20 pupils, this heat recovery unit is an efficient ventilation solution for medium sized class rooms, offices and conference rooms.

am-800-adjustedAirMaster AM 800

725 m³/hr with 35 dB(A) @ 1m, (no loss from this in passing through louvres)
or 650 m³/hr with 30 dB(A) @ 1m.

This air handling unit is well suited to standard classrooms, offices and meeting rooms. Modulating control keeps average CO2 concentration at less than 1,000 ppm, thus conforming to BB101 and ensuring that the learning environment is optimised.

AirMaster AM 1000

1,075 m³/hr with 35 dB(A) @ 1m, (no loss from this in passing through louvres)
or 950 m³/hr with 30 dB(A) @ 1m.

This unit has been designed to serve standard classrooms of 32 with a casing breakout noise of no more than 30 dB(A) at 1m.
The low casing breakout noise has been achieved by the use of active noise technology. This calls for a microphone to pick up the pattern of fan sound, a processor and a loudspeaker to emit an out of phase wave pattern which acts to neutralise the initial source. To ensure a constant throw length regardless of flow turndown, the inlet grilles adjust flow direction automatically, aiming wide at full throughput but narrowing towards the centre at lower flows. This air handling unit is shipped top site in 4 separate modules, for ease of installation.

Duct connections – further options

Further options are available in terms of duct connection, which can be made at the back (for passing through the wall) or at the top (for passing through the ceiling). Details are shown below:

HORIZONTALLY DUCTED MODELS

airmaster-pic10

The air intake and air exhaust duct connections are run directly to the outside through the wall on which the unit is mounted. If there is a suspended ceiling, the air handling unit can be recessed either 1/3 or 2/3, with the inlet duct repositioned so as to come immediately below the ceiling.

Mounting can be done either horizontally by wall frame or vertically by using adjustable support brackets. The outside wall penetration is finished off with louvered covers.

VERTICALLY DUCTED MODELS

airmaster-pic11

In this case the external duct connections are run vertically upwards through the roof. External roof caps and weather proof flashings can be offered as options. Arrangements for recessing and mounting are similar to horizontally ducted models.

Successful operation of wall mounted direct ventilation air handling units is dependent on keeping a smooth, even ceiling surface over the air throw area. Care should be taken to avoid having obstructions such as structural beams or light fittings just below the ceiling which may act as a bluff body in the path of the air flow. Where lighting provision exists in the throw area, the use of recessed or pendant fittings would prevent any restriction to the Coanda effect.

Throw distance varies between 5m for the AM 150 and 8m for the AM 1000. As the diagram shows, AirMaster heat recovery ventilation units distribute supply air with varying reach, depending on airflow. The blue tones of the illustration show the throw patterns at different airflows.

Document Downloads

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  • 1. AirMaster Brochure
  • 2. AirMaster Technical Data

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