Apartment lighting and ventilation: choosing lights and layout for comfortable living

Light-selection tips come from an advice article by a lighting equipment seller (not a regulation); the standard's requirements come from a summary article and should be checked against the original document. Updated 24 October 2026.

A beautiful apartment that is dark, stuffy or holds cooking smells is hard to live in for long. Light and ventilation are largely decided by the building's design; what you control is how you choose the unit and how you arrange it and choose lights to improve the rest.

1. Minimum standards for an apartment

According to a summary of QCVN 04:2021/BXD (issued under Circular 03/2021/TT-BXD, effective 5 July 2021):

• An apartment must have natural light; a unit with two or more living rooms may have one room without natural light.
• A bedroom must be well ventilated, have natural light and an area of at least 9 m².
• An apartment needs natural or forced ventilation; kitchen, bathroom and toilet areas need local ventilation (this point comes from another summary and should be checked against the original document).

In other words, an apartment that meets the standard can still have a "blind" room with no light. When viewing a unit, check which rooms have a window and which only have a vent opening.

2. How to check light and airflow when viewing an apartment

What to check	How
Number of rooms with a window to the outside	Count them in person; ask which rooms only have a light well or vent opening
Afternoon sun	Visit between 2 pm and 4 pm; see which rooms get the sun and need curtains or insulating glass
Airflow	Open the front door and balcony door and see whether air moves through the unit
Smell, noise	Stand in the bedroom and kitchen and see whether smells come in from the corridor or ventilation shaft
Orientation	Check the direction of the front door and balcony; see home orientation by birth year if your family cares about it, but also check the real sun and wind
Opposite building	Distance to the neighbouring tower and whether it blocks light

3. Choosing colour temperature by room

According to DESOU (13 June 2026), the recommended reference values are:

Room	Colour temperature
Living room	about 3000K, cosy, flatters furniture
Bedroom	2700–3000K, soft light, easy to relax in
Kitchen, dining table	3000–3500K
Bathroom, home office	3500–4000K, clear enough for make-up, reading and writing

The article also notes: in a continuous space, use one colour temperature throughout to avoid a mismatched look, and choose lights with a high colour rendering index (CRI) — the article recommends CRI of 95 or more; this is the adviser's suggestion, not a requirement. In a studio, where living, sleeping and kitchen share one space, choose one common colour temperature (usually warm), then add a separate desk lamp for the work area.

4. Layering the lights

1. Ambient light (general): recessed or ceiling-mounted lights for the whole room.
2. Task light: desk lamp, under-cabinet kitchen light, bathroom mirror light.
3. Accent light: picture light, string lights by the sofa, using soft light.
4. Multi-zone switches: separate the switches so you can turn on each layer; at night you only need the soft lights.
5. Motion-sensor lights: use them on the night path to the toilet, especially in homes with small children or older adults.

There is no per-room lux (illuminance) standard for homes that the open articles cite directly, so this article gives no lux figures; read the lamp specifications (lumens, beam angle) and test in the actual room.

5. Ventilation: small steps that work

• Kitchen: use a range hood with a duct to the outside; if the hood only recirculates, the smell stays in the home. Ask the management board about the building's smoke exhaust duct.
• Toilet, bathroom: run the exhaust fan long enough after showering to avoid damp and mould.
• Bedroom: leave the window or door slightly open at suitable times; don't seal every gap if you run the air conditioner for many hours.
• Air conditioner: clean it regularly; combine with opening the windows in the morning when the outdoor air is good.
• Plants: fine as decoration but not a substitute for ventilation (indoor plants).

6. Curtains, glass, paint colour

• Afternoon sun: double-layer curtains (sheer + blackout), insulating glass or insulating film help reduce heat; ask the management board if you change the exterior.
• Light wall colours and moderately reflective materials make a room look brighter (see also interior colours).
• Glass, mirrors: a mirror placed opposite a window reflects light, but avoid placing it facing the bed if you care about feng shui.

7. Common mistakes

• Choosing lights that are too cool (6500K) for the bedroom.
• Mixing several colour temperatures in one room.
• Placing a wardrobe that blocks the window of a small room.
• No smell exhaust path for an enclosed kitchen.
• Measuring only the area without checking the real sun and wind.

8. Checklist when buying / renting a unit

1. Which bedrooms have a window to the outside?
2. Is there harsh afternoon sun, and from which direction?
3. Does the kitchen have a smell exhaust path?
4. Does the toilet have a window or an exhaust fan?
5. Does a building opposite block the light?
6. Is the noise acceptable with the windows open?

For more on what to check when viewing a ready-to-move-in home, see what to check when viewing a ready-made home.

Note: this article does not replace measurement and engineer advice. The best way to judge light and airflow is to visit the unit at different times of day.

• ACC Group — QCVN 04:2021/BXD on apartment buildings (natural light, bedrooms from 9 m²; Circular 03/2021/TT-BXD, effective 5 July 2021), accessed 24 October 2026. Check against the original document.
• DESOU — Đăng Minh, Light colour temperature: choose 2700K, 3000K or 4000K?, 13 June 2026 (lighting equipment seller; room-by-room recommendations, CRI).
• Ventilation provisions for kitchens, bathrooms and toilets: the original document could not be opened; stated only at summary level, as noted in the article.