Yes, it is possible to use a heat pump without a traditional boiler. A heat pump can function as a standalone heating system that can both cool and heat. However, there are a few important considerations:

1. Heating System:

   • A heat pump can work in combination with a suitable heating system, such as underfloor heating, low-temperature radiators, or fan convectors. It is important to ensure that the heating system is compatible with the lower temperature of the water the heat pump provides.

2. Capacity and Sizing:

   • When designing a system without a boiler, the heat pump must have sufficient capacity to meet the heating demand of the home. Proper sizing is essential for the efficient operation of the heat pump.

3. Underfloor Heating or Low-Temperature Radiators:

   • Systems with underfloor heating or low-temperature radiators work well with heat pumps because they are more efficient at lower water temperatures. This allows for optimal utilization of the heat pump.

4. Outdoor Unit:

   • The heat pump requires an outdoor unit to extract heat from the outside air, ground, or water, depending on the type of heat pump. This unit can be placed outside the home.

5. Good Insulation:

   • A well-insulated home is beneficial because it reduces heating demand and improves the efficiency of the heat pump.

In some cases, a heat pump is combined with electric auxiliary heating for periods of very low outdoor temperatures or to meet heating demand when the heat pump does not have sufficient capacity.