A bucket of sorb costs about $140 for 45lbs. The Prism holds 6lbs.
So, if my math is right, about $19 to fill it. 19/6 = $3.16 per hour. Add in O2 fill for $4 and Diluent fill for $4 and you're up to about $4.50/hour. Of course, you'll have things like Oxygen Sensors, O-Rings, Flapper Valves, etc. But it'll come out to roughly $10 per hour when all is said and done.
I seriously considered the Prism2 before going with the Optima. The size and weight of the unit, ease of service (I live in FL, Hollis is on the other side of the country), and a few other important factors made the decision for me.
So, if my math is right, about $19 to fill it. 19/6 = $3.16 per hour. Add in O2 fill for $4 and Diluent fill for $4 and you're up to about $4.50/hour. Of course, you'll have things like Oxygen Sensors, O-Rings, Flapper Valves, etc. But it'll come out to roughly $10 per hour when all is said and done.
I seriously considered the Prism2 before going with the Optima. The size and weight of the unit, ease of service (I live in FL, Hollis is on the other side of the country), and a few other important factors made the decision for me.