We would need in-line electric fans actuated with 240V AC current for driving air of up to 50 degrees Celsius for the following ranges (15% plus or minus of each parametre is considered acceptable):
1) 0.05 cubic metres per second at 100 Pa difference in static pressure
2) 0.02 cubic metres per second at 100 Pa difference in static pressure
3) 0.02 cubic metres per second at 50 Pa difference in static pressure
We would also need a written statement of warranty that these products will be able to work at least 5,000 hours in these conditions.