Monodraught’s HVR range of units are able to produce up to 180 l/s of daytime ventilation each; a typical classroom utilises two units.
A powder coated aluminium body makes the system robust and easy to install. This body incorporates specialist acoustic panels which when combined with a low energy fan means that the systems maximum daytime operation sound level is down to 27dB.
A motorised supply louvre directs the supply air in to the space to maximise occupant comfort; in the winter the air-flow is directed towards to the ceiling to maximise mixing / minimise cold draughts, in the summer the air-flow is directed towards to occupants to maximise cooling effect.
The HVR APX is supplied with external damper design to meet a Passivhaus level of airtightness and is designed to exceed the requirements in the latest CIBSE TM23 guidance which requires ventilation systems to be closed but not sealed during the air testing of buildings. This has a high U-Value of 1.2Wm2K and when combined with the internal mixing damper and heat exchanger allows the system to supply tempered fresh air throughout the year.
The hybrid design with heat recovery allows a lower balance point in a typical classroom; comfort conditions can be maintained at lower external temperatures, minimising the heating required. The heat exchanger efficiency has been optimised for offices, education and healthcare buildings. APX has the perfect balance between fan energy and the heat exchanger resistance.
A combination of an intelligent controls system and sensors measuring the room, external and mixed air temperatures & CO2 levels allows the system to automatically control the internal environment. This control system can also be utilised for the operation of additional VENTSAIR facade systems and has a full data logging facility.
HVR range – key features:
· Brushless digital fan; high performance brushless digital fan delivers industry leading ventilation performance to power usage. Large flow volume reduces fan speed to a minimum thus reducing noise output;
· Motorised louvre grille; a profiled louvred grille (to reduce noise) directs ventilation air within the room the system is serving. Incorporating metal geared actuators, the louvred grille allows air flow to be automatically varied dependant on season or on user control;
· Low resistance heat exchanger; hydrophilic coated aluminium cross flow heat exchanger minimises resistance to airflows, lowering running costs and reducing maintenance, 43-50.1% sensible efficiency;
· Multiple segregated internal airways allow selectable ventilation air pressure strategies from natural ventilation, hybrid ventilation and mechanical heat recovery ventilation (Patent application 48086GB);
· Sensors; in-built temperature sensors continually monitor airflow temperatures and indoor air quality
· Acoustic profiling; imbedded Helmholtz resonance cavities within the casing reduce fan noise and minimise ventilation air movement noise (Patent application 48039GB);
· Acoustic engineered; the densities and thicknesses of the acoustic EPP material vary along the body of the system maximising acoustic properties and air flow through the system;
· EPP structure; Flame retardant Expanded Polypropylene (EPP) is steam fused to form the complex airflow paths within the system. EPP provides acoustic and insulative properties and is fully recyclable;
· Aluminium casing; aluminium sheets are profiled and then coated in industrial layers of white RAL 9016 powder coating. Speed fixings;
· Mixed air adjustment; uPVC volume control blades with integrated seals adjust air flows between natural, hybrid and heat exchange;
· Inclined profile; the mounting of the scroll fan maximises exit velocities causing the ventilation air to align along the acoustic surfaces;
· Recirculation & exhaust grille; the Injection Moulded lower grille using a honeycombed structure to maximise airflow through the grille proving the least resistance and minimising air flow noise;
· Exhaust air; an upper horizontal profile allows air to be exhausted from the room. This air can either be passed through the heat exchanger or from higher level exhaust grilles;
· Intake air; a lower horizontal section brings fresh air into the system;
· Coils; designed for operation traditional LPHW, CW or heat pumps up to 3.5 kW output;
· Nominal dimensions; 1250 x 950 x 298mm (1450 x 950 x 298mm with coiling coil);
