[arevalo53anos]

There was a long time I posted the lines below.
Since I have in a hurry just now, please let me to paste these lines without edition.
I hope this could help

As empirical as the numerical dome door relationships are, there is a reason behind them.
This is based and referred to a flux (or flow) gases behavior.
Shortly speaking, when the gases in the oven are getting hot, these gases are driving in a turbulent pattern, from the ignited wood in the floor to the oven ceiling. These hot gases fill the under ceiling space pushing down and out the cold gases, until reaching the upper door aperture, leaving the oven in a disordered cloud type pattern.
The following hot gases coming to the ceiling found a hotter environment that the first ones. As is not to easy to push this gases right down, a path coming from the fire on the side of the oven, bordering the ceiling and the upper side of the door is formed and the gasses goes down to the upper edge of the door and straight up from there.
The fresh air enters by the lower edge of the door directly to the embers on fire.
There is an ordered path now, growing as the fire increase, the flames are attracted by this ‘suction path’ and it is easy to be surprised by the straight fire dancing.
In regime, the fresh air is incoming by the down space of the door and the hot gases are going out by the upper edge of the door to the vent area and chimney.
If the door is too high, the hot gases coming from the fired wood, will escape right before reach the upper dome and an ‘isolate’ layer of cold air will be between the hot gases and the ceiling. More fuel to reach the desired temperature.
As indirectly consequence of the door being too high, more heat will escape when baking.
If the door is too low (always in relationship with the dome height), the hot gases will separate of the ceiling edge before reaching the upper edge of the door, which cause severe turbulence just in front of the door. The air rarify, the flow path is discontinued and will be hard to the hot gases to go out. Returning gases have little oxygen. The fire in the woods will be suffocated. More fuel and changing in the embers position to reach the desired temperature.
Conclusion: In my opinion, could be better be wrong having a higher than a lower door.
In practice, the two examples above are a little extremes, and I am pretty sure that plus or minus 5% of difference from the 64% calculated will not create bigger problems that spending a little more fuel (wood).
Otherwise, the Napolitano pizza ovens have a relationship of H= d/3.4. And they are the best to baking pizza. H being the dome high and d being the dome diameter.
If thinking about this, could be a better solution for you to maintain the Door/Dome relationship in 0.64 by flattening the upper part of your dome.
Better for pizza, faster to heat and less fuel to spend on it.


Luis