The energy consumption of a heat pump compared to gas depends on various factors, including the type of heat pump, the insulation of the home, the outside temperature, and the efficiency of the heating system. In general, however, heat pumps are more efficient than traditional gas-fired heating systems.

Here are some key considerations:

1. Energy Efficiency:

   • Modern heat pumps are designed to operate efficiently and derive a significant portion of their heat from renewable sources, such as the outdoor air, ground, or water. The efficiency is often expressed in the seasonal coefficient of performance (SCOP/SPF), which indicates how much heat the heat pump can deliver relative to the electricity consumed. A high SCOP/SPF indicates efficient operation.

2. Type of Heat Pump:

   • Air-to-air and air-to-water heat pumps extract heat from the outside air and are generally less efficient at lower outside temperatures. Ground-to-water and water-to-water heat pumps typically have a more consistent performance, even in colder conditions.

3. Gas-Fired Heating:

   • Traditional gas-fired heating systems have lower efficiency than heat pumps. When burning gas, a significant portion of the energy is lost as heat.

4. Home Insulation:

   • A well-insulated home reduces heat demand, which is beneficial for both heat pumps and gas-fired systems. However, heat pumps often perform better in well-insulated homes.

5. Fuel Mix:

   • Comparing the consumption of a heat pump to gas also depends on the fuel mix for electricity generation. If the electricity comes from renewable sources, using a heat pump is more environmentally friendly.