1500+ Exhales

With 2 Smoke Erasers in rotation, the addition of the 2nd creates exponential lifespan increases for both. This was actually discovered accidentally and seen initially as an anomaly due to the remarkable amount of time each lasted. This can now be achieved though 2 ways; through the rotation of 2 units, or by the addition of a Dock. The difference is simply rotating 2 units increases the life of 2, while adding a single Docking Station  increases countless lifespans.

So breath moisture is the reason for short lifespans in competing units (300-500 uses is premature failure). Smoke Eraser easily doubles this with a single unit. Those wanting even more though can add a 2nd for the extra downtime, or a Docking Station to dry over-wetted HEPA filters. Either method effectively maximizes exhales, as long as long as resin is being purged as needed from prefilter; handled simply with a soak in alcohol.

But since the introduction of the Docking Station, typical orders from Smoke Eraser vets have continued to be SE Pairs (or more), with most eventually purchasing a 2SE/Dock (once) to score a Dock for cheap. Smart since keeping a Dock on deck then minimizes the pairs they'll buy again while keeping a tremendous # of them wide open. 

As for the options below, although strongly recommended for heavy users, they're ideal for any looking to maximize exhales...

SE Pair

SE/Dock

2SE/Dock