Re: I work in an office with very low levels of oxygen, what can I do?

I answered a related question recently about using plants to raise the oxygen 
level in a building, and the answer was no because the oxygen level in air is 
so high already it is hard to change it with plants. I doubt your problem is 
low oxygen but it might be high carbon dioxide. The carbon dioxide level in air 
is so much lower than oxygen that it should be possible to lower carbon dioxide 
levels substantially with plants. The problem is that to have a major effect, 
you may need either large numbers of plants or higher light levels than 
normally found in office buildings. Bringing in small numbers of plants may 
help psychologically even if they have no major effect on the carbon dioxide 
levels.

Carbon dioxide in outdoor air averages about 400 mg/liter or parts per million. 
Carbon dioxide toxicity symptoms apparently appear at around 15,000 parts per 
million or 1.5% and above. OSHA has a Threshold Limit Value-Time Weighted 
Average (TLV-TWA), which is the time-weighted average concentration for a 
normal 8-hour workday and 40-hour workweek, to which nearly all workers may be 
repeatedly exposed, day after day, without adverse effect. The TLV-TWA for 
carbon dioxide is 5,000 parts per million.

The best way to approach the problem would be to get a carbon dioxide measuring 
device and first see what the levels are in your office throughout the day to 
be sure carbon dioxide is in the problem range. Perhaps, your problem is really 
odors, humidity, mold, toxins from ground zero or outgassing from plastics, 
carpets, etc. OSHA should be contacted if you suspect a health problem in the 
workplace. If carbon dioxide is extremely high, bring in plants and see if they 
have any effect on the carbon dioxide levels. There is no easy way to estimate 
the number and type of plants you might require given the many variables, such 
as carbon dioxide concentrations, light levels, building size, and ventilation 
rates. 

There are carbon dioxide scrubbers available for sale but they are probably too 
expensive.

Reference


Carbon Dioxide Toxicity