Does my house have a higher concentration of oxygen if I have a lot of house plants?

I have lots of houseplants. In theory, my house should have more oxygen than most people's. Am I right?

Does my house have a higher concentration of oxygen if I have a lot of house plants?
I test houses for indoor air quality and my meter is set up to measure the percent of Oxygen (O2) and CARBON MONOXIDE (CO) in parts per million. I have never seen a house with higher than the average oxygen 20%.
Reply:maybe a very slight higher conc of oxygen, but not enough to make a difference.
Reply:Humans breathe in oxygen and exhale carbondioxyde. Plants take in this carbondioxyde and release oxygen. At night, though, plants breathe the way humans do. So yeah, I think there's more oxygen in your house than in a house with no plants at all but you certainly won't notice it if you open your windows every now and then - it's not all that much, you know. Not like you could start charging your guests admission. =) On the other hand, with so many plants cleaning the air in your house, you may not feel the need to air it that often.
Reply:hmm.. interesting question. My guess is probably not, your house is not a vacuum, so the oxygen levels will try to equalize with the air outside. Kind of like when you put an ice cube in a warm glass of water, the ice cube eventually melts making the whole body of water one even temperature. The oxygen will equal out with the air around it. My theory...