TT 100 EC is a 4-inch mixed-flow inline duct fan from Vents-US, using an energy‑efficient electronically commutated (EC) motor. It delivers up to 160 CFM, approximately 272 m³/h, at 0 in. static pressure and fits standard 100 mm ducting. The ABS housing is lightweight and durable, with long‑life ball bearings rated to 40,000 hours. Sound levels are low (about 1.7 sones), and speed is variable with support for external 0–10 V control. The unit operates on 120 V/60 Hz and ships with a mounting plate and power cord for straightforward installation. Suitable for supply or exhaust applications in residential or light commercial spaces, this model offers roughly 35% lower power consumption than comparable AC‑motor fans while maintaining solid airflow performance.