What are the two types of electric baseboard heaters?

The two types of electric baseboard heaters are indeed hydronic and resistance baseboard heaters.

Hydronic baseboard heaters operate by circulating hot water through pipes situated within or near the heater. The water is heated by a boiler or water heater and then pumped through the system, emitting warmth into the living space. This type of heating is energy-efficient and can provide consistent heat, making it a popular choice where comfort is desired.

Resistance baseboard heaters, on the other hand, utilize electrical resistance to generate heat directly. When electricity passes through a resistive heating element, it produces heat that warms the air around it, effectively heating the room. These heaters are straightforward in design and can be installed easily in existing structures, making them a common option for supplemental heating in spaces where central heating may not be available or sufficient.

Understanding the distinction between these two types is essential for HVAC professionals, as each system has different installation requirements, efficiency ratings, and operational characteristics, which impact their suitability depending on the specific heating needs and existing infrastructure of a building.