The PK125 EC-TC is the strongest 125mm fan in the range. It reaches 680m3 per hour at full power yet stays compact. The Swiss Ziehl-Abegg motor drives backward-curved blades that build high pressure, so the fan barely loses pull when a filter and ducting are fitted.
An adjustable speed range from 20 to 170 watts ties to a thermostat. Below your set temperature the fan idles at the minimum; above it the fan runs flat out. A digital external sensor ships on a 4-metre cable, with a mounting profile and cable included. The motor carries a one-year warranty.