Interviewer instructions
Write "X" in the box corresponding to the estimated floor area of the housing unit.
There are many ways in approximating the total floor area. You may use any method convenient to you such as, use a meter stick, visual approximation (using your eyes only), or pace factor (see Appendix 10, page 264 of the Enumerator's Manual). In case the respondent does not know the floor area of the housing unit, you can approximate the floor area using any of the aforementioned methods. Familiarize yourself with the length of a meter so that you can do visual approximation.
To get the estimated floor area (EFA) of the ground floor, use the formula:
EFAGROUND FLOOR = 10 meters x 7 meters = 70 sq. m.
Use the same formula for the second floor:
EFASECOND FLOOR = 10 meters x 9 meters = 90 sq. m.
To get the TOTAL ESTIMATED FLOOR AREA of the housing unit, which will be the answer to the inquiry "What is the estimated floor area of this housing unit?" The formula is :
EFAGROUND FLOOR + EFASECOND FLOOR = 70 + 90 = 160 sq.m.