Do we need to know the facing of the house to take its degree?
No. The facing is the side of the main door, opening or road, and using it is only one easy way to read the degree. What matters is to find where North lies; once one direction is known, the rest follow at 90 degree steps.
Related questions
Are three doors in a straight row inauspicious?
They can be either. In the South and West, from where negative energy comes, three doors in a row on padas where doors should not be are inauspicious. In the North and East they are auspicious: temples, all built facing North or East, have three or five doors in a row, as do royal palaces, so the blanket belief that they are bad is a myth.
How do we find N1 to N8 and the other door padas on a map?
Use the zoning chakra shown on the first day, or draw it: from the centre of the map draw the four directions 90 degrees apart and the corner directions at 45 degrees, then halve again to 22.5 degrees and once more to 11.25 degrees, which gives 32 padas (360 degrees shared by the 32 guardian devtas). Starting from E1 next to the North-East line, go round clockwise from E1 to E8, then S1 to S8, W1 to W8 and N1 to N8, on the 81-pada grid. Practise this as homework.
The kundli chart was shown with directions. How are those directions used, and what can a kundli tell about a house?
Go by the houses, not the numbers written in them: the top house is the 1st house (East) and the 4th house is North. If the planets on the North side are strong, the North direction is very good for the person. A kundli can even reveal where a person's house is, where its door is, how many windows it has and where a nearby river, pond or temple lies, so a map of the house can be drawn without seeing it.
What is mulank, and why does it carry less weight than rashi or the birth chart in choosing a door?
Mulank is the digit sum of the birth date: born on the 1st it is 1, on the 11th 1 + 1 = 2, on the 13th 1 + 3 = 4, on the 18th 1 + 8 = 9. Indian astrology gives it little weight because India runs by tithi, not by date; if dates mattered, tides, amavasya, purnima and eclipses would fall on fixed dates. Doors by mulank follow the planet of each number (1 Sun East, 2 Moon North-West, 3 Jupiter North-East, 4 Rahu and 7 Ketu South-West, 5 Mercury North, 6 Venus South-East, 8 Saturn West, 9 Mars South), but the rashi and the birth chart should decide.
When door effects are given for each zone, do they mean the main door or room doors?
They refer to the main door of the house, not ordinary internal doors.
A bungalow has a good North entry but a semi-basement in SE, SSE and the South, with its entrance from inside. What will happen?
Even with good doors, if the basement is wrong, the house gets the results of that wrong basement.