Appendix B: HTM Technical Data
Louvre sizes and requirements for HTM systems
For the HTM systems to operate, they require at least one dedicated louvre on the external façade that would be connected to each HTM system. The louvre should generally match the overall size of the HTM system it is connecting to, however there is flexibility to also utilise alternative size louvre.
HTM F system – It is recommended that a louvre size of 900mm(w) x 500mm(h) is utilised. Should a different sized louvre be required, a minimum louvre area of 0.45m² should be achieved.
HTM FS system – It is recommended that a louvre size of 900mm(w) x 300mm(h) is utilised. Should a different sized louvre be required, a minimum louvre area of 0.27m² should be achieved.
Where additional natural ventilation louvres are being utilized within a room which has HTM systems assigned, there is no minimum or maximum sizes required. These can be sized to match other elements within the external façade of room.
Recommended HTM system room configuration
As there are many variations of room sizes and room usages, a guide of recommended system quantities for a few different room sizes and applications has been detailed below.
Education
- Standard Classroom (from approx. 55m², as long as width <11.0m or depth <9.0m)
- 1 HTM F system or 2 HTM FS systems.
- Large Classroom (from approx. 100m² or when width >11.0m or depth >9.0m)
- 2 HTM F systems or 3 HTM FS systems.
- IT Classroom (32N° Occ & PC’s) – 2 HTM F systems.
- Staff breakout, Group Rooms (approx. <30m²) – 1 HTM FS system.
Other
- Office areas – 1 HTM F system or 2 HTM FS systems per 20m².
- Staff breakout, Meeting Rooms (approx. <30m²) – 1 HTM FS system.
- 25N° people (at 10 l/s/p) – 1 HTM F system.
- 12N° people (at 10 l/s/p) – 1 HTM FS system.