The choice between a wall-mounted air conditioner and a heat pump depends on several factors, including:
1. **Heating and Cooling Needs**: If you need both heating and cooling in your area, a heat pump would probably be the best option as it can provide both functions. On the other hand, if you only need cooling, you can opt for a traditional air conditioning system.
2. **Energy Efficiency**: Heat pumps are generally more energy efficient than traditional air conditioning systems because they use the heat from the outside air to warm the interior in the winter. If energy efficiency is a priority for you, a heat pump may be the best option.
3. **Initial and Operating Costs**: Initial and operating costs can vary between air conditioning systems and heat pumps. Be sure to compare the purchase, installation and operating costs to determine which option best fits your budget.
4. **Local climate**: The local climate plays an important role in choosing between air conditioning and heat pump. In regions with harsh winters, such as Canada, a heat pump heating system therefore seems to be the most suitable.
In summary, the choice between air conditioning and heat pump depends on your specific heating and cooling needs, your priority for energy efficiency, your budget, and the local climate in your area.