What is the minimum opening area for a habitable room?

The aggregate area of openings for both lighting and ventilation should be at least 1/10th of the room's floor area (Clause 5.2).

Does this code cover air conditioning?

No, this code focuses on natural and mechanical ventilation (fans). Air conditioning is covered in other specialized standards and the National Building Code.

What are the ventilation requirements for a kitchen?

Kitchens require special attention to remove heat, smoke, and odours, with recommended air change rates of 10-15 per hour, often achieved with exhaust fans (Clause 6.1 and Table 1).

Where should ventilators be located?

Ventilators should be located near the ceiling, with their bottom not less than 2.1 m from the floor, to effectively remove warm and stale air.

IS 6272

: 1971

Code of practice for ventilation of residential buildings

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This standard provides guidelines for the natural and mechanical ventilation of residential buildings. It specifies minimum requirements for openings, recommends air change rates for various rooms, and outlines principles to ensure adequate air quality and thermal comfort for occupants.

Outlines guidelines for ensuring proper ventilation in residential buildings for comfort and health.

Quick Reference Values

Minimum aggregate opening area for lighting & ventilation1/10th of the floor area

Minimum clear opening area for ventilation only1/20th of the floor area

Recommended air changes per hour for Kitchens10 to 15

Recommended air changes per hour for Bathrooms/WCs6 to 10

Minimum height of ventilator opening above floor2.1 m

Practical Notes

While this standard is still active (reaffirmed 2021), many of its provisions are now covered more comprehensively in the National Building Code of India (SP 7), particularly Part 8 - Building Services.

The code's recommendations for opening sizes are often a starting point, with final design influenced by climate, building orientation, and specific occupant needs.

Focus is on providing both 'air for health' (fresh air) and 'air for comfort' (air movement), which are distinct objectives.