RMH exhaust in greenhouse?

I guess my question should really be: Has anyone ever examined the gas composition of RMH exhaust?

Allegedly, the majority of the exhaust of an efficient RMH is CO2 and H2O. But I wonder what the rest is? And whether the "rest" is poisonous to plants? And how different "the rest" is when the fire is started versus actively burning?

Many greenhouse plants benefit from higher CO2 and H2O in the air. So I am thinking the RMH exhaust could very well benefit the greenhouse plants (to a certain extend).

My idea is to build a RMH with the fire pit outside the greenhouse (so it always has ample O2 supply for an efficient burn) and the burn chamber and thermal mass inside the greenhouse. The chimney would have a dual outlet, allowing to choose whether the RMH exhaust is released into the greenhouse (and the greenhouse effectively becomes a part of the chimney), or outside the greenhouse (and no exhaust gas gets in the greenhouse). There would obviously need to be a secondary chimney that can be opened when the RMH exhaust is funneled in the greenhouse, or closed when the RMH exhaust is channeled straight outside the greenhouse.

Has anyone tried this?

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Allegedly, the majority of the exhaust of an efficient RMH is CO2 and H2O.

The majority of the exhaust is actually the same as the majority of the input air, Nitrogen.

It is not a good idea to route your exhaust into your greenhouse.