FTB020 – Electrak 1 Second Stage Filter

Electrak 1 Second Stage Filter. The Electrak 1 Second Stage Pocket Filter is designed to catch the finer material that passes through the first stage filter, but is not destined for the HEPA. The Electrak 1 Second Stage Filter is ASHRAE 95% Efficient. Only the finest of particles are filtered by your HEPA pass through the Electrak 1 Second Stage Filter.