Stove with viewing window - Distance to the door

Hello everyone,

I'm trying my luck here with my question.
I have a masonry heater in the house. It has a viewing window at the front and is fired from the back. The viewing window is locked, so it can only be opened with tools.
Next to the stove is a room door. When closed, it is sufficiently insulated from the stove and the radiant heat does not go towards the room door. When open, the room door is indeed in the direction of the radiation (45 degrees) but more than 80 cm away. In the half-open state, however, I do not reach the 80 cm.
My question is whether I need a distance of 80 cm here at all, since the stove door cannot be opened at this point.
And, from where should I measure 80 cm? From the window or from the firebox?

Thank you

Hello, you should be able to find the corresponding distances in the installation or operating manual of your oven. Depending on the oven, these can vary, so no one can give you a general answer here.

That should be stated in the corresponding firing regulation. With us, a distance of at least 1 meter must be maintained to combustible objects or components in front. However, the chimney sweep who approved the thing should also know that, right?