ionizer

my grand parents just got us a ionizer that knocks out stank. works great.it says it makes co2 as a byproduct. is this good?or am i misinformed?

yeah from what i heard they are, a friend of mines been growin hydro for about 16 years and thats what he told me to use for smell .im buying a small one for inside my growroom n a bigger one to sit outside the grow room