Vietnam and Indonesia advise on incense‑burning etiquette

Vietnamese households are encouraged to prepare the altar before lighting incense by clearing dust, arranging flowers and offerings, and ensuring any water or flower vessels are fresh. Clean hands, tidy clothing and a calm mindset are also advised to maintain respect for ancestors.

Indonesian families consider whether to open or close doors during incense ceremonies. While there is no mandatory rule, many keep doors slightly open to allow airflow, reducing lingering smoke and improving comfort, especially in small or poorly ventilated rooms. However, doors should not be opened wide if strong drafts might disturb the altar or pose fire hazards. Both cultures stress keeping the altar area clean, monitoring incense for safety, and using incense that produces minimal smoke.

Overall, the guidance emphasizes a balance between reverence and practicality: maintain a tidy, respectful space, ensure proper ventilation, and approach the ritual with sincere intention.