Which type of heater is prohibited to achieve compliance for space-heating systems?

Portable space heaters are typically prohibited from being used to achieve compliance for space-heating systems due to safety and efficiency concerns. These heaters are often designed for temporary use and can be more hazardous than other types of heating equipment. Their mobility can lead to improper placement, creating fire risks or electrical hazards, especially if they are used inappropriately in locations not designed for their use.

Permanent heaters, baseboard heaters, and central heating systems are designed for specific installations and typically meet safety and performance standards appropriate for long-term heating solutions in residential or commercial spaces. These systems usually have stricter installation and operational regulations that ensure they operate safely and efficiently, making them compliant with established heating codes. In contrast, portable heaters lack these features and are not meant to be a permanent solution, hence the regulations that prohibit their use for compliance in space heating activities.