Originally Posted by zboss
Does an dorade count as a "A permanently open fresh air inlet" for a Newport Diesel
The Answer is typically no.
Unless it facing the wind
. Usually they are aft facing and are counter productive. As in that position they act as a convection chimney (heat rises). And will starve the pot of oxygen.
stove is a drip pot burner, that relies on draft
from the convection of the heat rising through the stack, to intake combustion air into the burner.
So any additional convection losses by a dorade just starve the stove of the oxygen required for an efficient burn of the fuel
in the pot.
A barometric dampener is not going to stop the stove from the dreaded back draft
that fills the cabin
with unburnt oil/carbon/fumes. The job of a barometric dampener is to stop the stove from running to lean.
A drip pot/draft burner needs to run in balance, much like an external combustion engine. It can't run to rich, nor can it run to lean.
When running lean you risk the dreaded downdraft, when running to rich you risk the dreaded tar and soot spewing from the stack as well as the dreaded down draft.
So that's why they are called balanced draft burners.
You must supply the stove with intake air(oxygen) that is not subject to convection/drafting or other negative losses from windage.
Ideally the air intake should be vented from both sides of the boat, and not subject to wind
direction. One forward and one aft.