Stand facing the door on the outside if it s a locking door stand on the side of the door where you would insert a key or unlocking tool if it would be a privacy lock.
How to determine left or right door lock set.
If the door is on your left it s left handed.
However the clerk taking the order may still get confused especially if you re ordering over the phone.
Most contractors use the x o to indicate x for exit and o for ouch it s a quick and easy way to remember similar to lefty loosey righty tighty.
Using the picture below you see a x on the moving or operating panel and a o on the non moving or stationary panel.
In the vast majority of cases a right hand door will require a right hand lever and vice versa.
Notice where the hinges are.
C if the hinges are on your right side it is a right handed door.
So that s it right.
3 standard or reverse handed push in or pull out.
If the hinges are on the left you have a left handed door.
B if the hinges are on your left side it is a left handed door.
Stand with your back to the jamb that has the hinges.
You will need a left handed lh lock.
Are they are on your left side or right side.
If the door is on your right it s right handed.
However that rule applies when the door opens into the room.
To do this you ll need to stand on the outside of your door.
When determining handing for sliding patio doors you always view the door from the exterior or outside facing the door.
It s best to order your doors in person.