In Jain Dharma, the guiding principle is ahimsa (non-violence) toward all living beings. Fire itself is a natural element and using it is not forbidden, but one should be mindful of causing harm to tiny life forms that might be affected when fire is used (for example, insects in the path of burning fuel, cooking, etc.).

• For ordinary household needs (cooking, heating, light), laypeople typically use fire as a practical necessity. This is generally accepted as long as you try to minimize harm to living beings (e.g., keeping insects away, using clean fuel, and not wasting resources).
• Monks and nuns who follow stricter austerities may reduce or avoid exposure to fire in certain practices or fasting periods, aiming to limit harm and attachment to fire-based comforts.
• In temples and rituals, fire is used symbolically and ritually, but the underlying goal remains non-violence and mindful living.

If you have a specific situation (e.g., a vow, a particular festival, or a household practice), I can tailor the guidance more precisely within the Jain framework.