How do electric heating and heat pumps differ?

Electric heating directly converts electrical energy into heat through a resistor via Joule heating. In contrast, a heat pump uses an electric motor to power a refrigeration cycle that transfers existing thermal energy from an external source, achieving significantly higher energy efficiency.

What we know

• Electric heaters convert an electric current directly into heat using an electrical resistor as the heating element based on Joule heating. [2]
• Heat pumps can achieve a coefficient of performance between 1.5 and 6.0 by transferring existing thermal energy rather than generating it directly. [2, 3, 4]
• Heat pumps require more expensive equipment and plumbing compared to simple direct electric heating systems. [2]
• Air source heat pumps can extract heat from cold ambient outdoor air to warm buildings, utilizing the same vapor-compression process as air conditioners. [3, 4]

Where to go next

• how it workedHow does a vapor-compression refrigeration cycle work?
• a case in pointWhat are the primary types of heat pumps?
• the bigger pictureHow do HVAC systems impact building energy efficiency?
• what caused itHow did the boycott of Russian gas affect heat pump adoption?
• compared withHow do gas boilers compare to heat pumps in carbon emissions?
• an unexpected connectionCan refrigerators and home heating systems use the same technology?Refrigerators operate on a refrigeration cycle that removes heat from an internal space and discharges it outside, which is functionally the exact reverse of how a heat pump warms a home.

Sources

• [1]electric heating (Wikidata Q13221754) · CC0 1.0
• [2]Electric heating · CC BY-SA 4.0
• [3]Heat pump · CC BY-SA 4.0
• [4]Air source heat pump · CC BY-SA 4.0
• [5]Heating, ventilation, and air conditioning · CC BY-SA 4.0