Heat pumps and HVAC (Heating, Ventilation, and Air Conditioning) systems are two different types of systems for heating and cooling buildings. It's not necessarily a question of which one is better, but which system is better suited for a particular building and climate.

Heat pumps are very efficient for heating and cooling in moderate climates, but they may not be the best choice in extreme climates. In cold climates, heat pumps may struggle to extract enough heat from the outside air to heat the building efficiently, requiring the use of a backup heating system. In very hot climates, heat pumps may not be able to provide enough cooling to keep the building comfortable.

On the other hand, HVAC systems are more versatile and can be used in a wide range of climates. They can be used for heating and cooling, as well as for ventilation, air filtration, and humidity control. However, HVAC systems are typically less efficient than heat pumps, especially when it comes to heating.

The choice of which system to use depends on several factors, such as the climate, building size, energy costs, and personal preferences. A professional HVAC contractor can help you determine which system is best suited for your particular needs.

In summary, both heat pumps and HVAC systems have their advantages and disadvantages. Heat pumps are generally more efficient, but may not be suitable for all climates, while HVAC systems are more versatile but typically less efficient for heating.