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Note: The area of the qualified escape opening and the existing window(s) (though not qualified as the means of escape) can be added together to satisfy the 8% requirement.

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Hope this helps.

Conclusion:

1. You need to have a gross (aggregate) glazed area that is at least equal to 8% of the entire floor area. If a glazed window is installed in the office space, it can be a fixed pan window if meets "Exception 1"; if the requirement of a glazed area in the room is waived per "Exception 2", you have to make sure the totaling of the glazed area in other space(s) meets the 8% requirement.

2. You need to make sure you have at least one escape opening (openable) that meets the code requirement.

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If I didn't make mistake, the existing window does not meet code definition of an excape/rescure window, which requires:

• The bottom of the egress window opening can't exceed 44" from the finished floor.

• The minimum opening area of the egress window is 5.7 square feet.

• The minimum egress window opening height is 24" high.

• The minimum egress window opening is 20" wide.

• The egress window must have a glass area of not less than 8% of the total floor area of room(s) for which it is servicing, to allow the minimum amount of sufficient natural light. *

• The egress window must have a opening area of not less than 4% of the total floor area of room(s) for which it is servicing, to allow the minimum amount of natural ventilation. *

• Multiple windows can be used to service a single area where one window does not meet these percentages of total floor area. As long as the totaled amounts from this combination of windows meet or exceed the 8% for natural light and 4% for natural ventilation.

If I didn't make mistake, the existing window does not meet the code definition of an escape/rescue window, which requires:

• The bottom of the egress window opening can't exceed 44" from the finished floor. (As noted, your window is 78" from the floor)

• The minimum opening area of the egress window is 5.7 square feet. (The area of the 32"(W)x15.5(H)" window is 3.47 square feet)

• The minimum egress window opening height is 24" high. (Your window height is 15.5")

• The minimum egress window opening is 20" wide.

• The egress window must have a glass area of not less than 8% of the total floor area of room(s) for which it is servicing, to allow the minimum amount of sufficient natural light. *

• The egress window must have a opening area of not less than 4% of the total floor area of room(s) for which it is servicing, to allow the minimum amount of natural ventilation. (*)

(*) Multiple windows can be used to service a single area where one window does not meet these percentages of total floor area. As long as the totaled amounts from this combination of windows meet or exceed the 8% for natural light and 4% for natural ventilation.

Hope this helps.