Hy Everyone,
We have built a rocket mass heater in our little 6 x 8 foot green house I know it is toooo big for it.
but I am planning on putting up a cover over 2 raised beds near the green house.
With this in mind we ran too exhausts out of the RMH going in two different directions.
We have not fired it up yet.
My question is: Is it OK to have two exhausts and should both of them be open?