Table 4. Conducted design criteria for application in existing office in Egypt: Author.

Design features	Additional detail
Operable Windows	• 75% of occupied areas have operable windows. • Minimum 4% area of net floor area. • Weather indicator light. • Manual shading controllable by occupants. • Automating shading to prevent glare. • Operable windows must be opened at least halfway, with the maximum height from the finished floor not exceeding 1.8 m and a minimum dimension of 0.3 m for the smallest opening. • Window operation control is at least 1.7 m above the finished floor. • Low opening windows for mild/warm weather. • High opening windows for wintry weather. • Easy to operate windows with minimum use of force and operates single handily, with enough space around it to operate.
Natural Light Design	• Within a 5 m distance between seatings and envelope glazing, VLT > 40%
Visual Lighting Design	• Minimum 320 lux at task surface.
Lighting Design for Circadian Rhythm	• The necessary light levels should be achieved from a height of 45 cm above the work plane. • Regular users can control their own lighting environment with manual controls found in the same area as each light zone. • Minimum one portable supplemental light is available.
Movement	• Height adjustable desk. • Height and depth adjustable chair. • Height adjustable devices. • Footrest. • Recessed toe space (min. 10 cm depth and height).
Thermal Comfort	• Availability of thermostat in the room. • Temperature sensors should be positioned at least 1m away from exterior walls, doors and windows, direct sunlight, air supply diffusers, mechanical fans, etc. • Radiant panels with minimum coverage of half the wall.
Mind	• Design elements that celebrate culture and space, integration of art, and human delight. • View of indoor plants and/or water and natural elements.
Sound	• Doors and walls sound isolation design.