I am a beginner and would appreciate some clarification. We have recently purchased a double-wide manufactured home. It faces the SE. The outside door comes in from the E into the dining area. Directly across from this door is a sliding glass patio door. It is located in the S,(living room) but goes to a screened porch. The porch entry door faces the SE. Please help me determine which door is the proper door to use. Thank you Marie