Using Natural Burning Oil to Produce CO2

Hello!

I noticed a pretty dramatic humidity spike when using oil. Each burner gives me a 400 ppm boost in this small room, but at the cost of 10% humidity.

I have a little dehumidifier, but that does far from good. Some questions:

-What could be the cause of the humidity? I'm pretty sure oil doesn't have water vapor as a by product...

-Is there any way to chop the humidity other than yet another dehumidifier? I plan on using an air conditioner to at least get it down to 60, since they're already 2 weeks into flower and humidity is usually 80%.

Thanks in advance. First grow, trying to be cautious.

Can I get a bump bump with a 10 word minimum limit?

Most things that burn produce water vapor except for pure carbon (ie coal). Oil being a hydrocarbon will burn to creat CO2 and H20. You could try using some dessicants but prob not worth it in long run