- MEV - Mechanical Extract Ventilation. Manually controlled Extracts to wetrooms and fresh air supplies to living rooms - LUNOS Silvento ec + ALDR
- DMEV -Time, Temperature and humidity controlled Extract Ventilation controlled Extracts to wetrooms and fresh air supplies to living rooms - LUNOS Silvento FK + ALDR
- Hybrid Systems- Timed Extracts to wetrooms and Heat recovery to living rooms - LUNOS Silvento ec + E2 +Nexxt
- MVHR Systems Timed Extracts to wetrooms and Heat recovery to living rooms - LUNOS EGO + E2 + Nexxt
- SFP specific fan power or energy consumption, this can fluctuate depending on the system
- CE marking- have they been tested and references of where they have been used?
- Noise level or db level and at what distance is that measured away from the fan. LUNOS measure at 1m, where most supplies measure at 3m.
- Pressure difference. Is it capable of maintain the extraction rate regardless of external conditions or meeting the air extract demand of a dwelling eg. Wind, exposed area, coastal region. LUNOS radial fans are superb in this area.
- Warranty with the system, are parts easily replaced if something breaks
- How often do filters need to be changed or cleaned
- Efficiency of the system
- If it is a heat recovery system how much heat does it recover summer ventilation mode
- Can the system be upgraded



