Can a heat pump keep you cool when it's 36C outside?

Yes, a residential heat pump can effectively keep your home cool when outdoor temperatures reach 36 degrees Celsius (96.8 degrees Fahrenheit), provided the system is properly sized, well-maintained, and in good working order. During the summer months, a heat pump operates fundamentally the same as a standard central air conditioning system, utilizing a refrigeration cycle to absorb thermal energy from inside your living space and reject it outdoors through the condenser coils. However, at extreme temperatures like 36C, the system has to work significantly harder against a massive thermal gradient, which can slightly reduce its energy efficiency and extend runtimes. To ensure optimal cooling performance during hot weather, it is essential to keep outdoor condenser coils clean of debris, ensure adequate shading, and replace your indoor air filters regularly. You can verify that your heat pump is handling the outdoor heat properly by confirming that supply air feels crisp and cool, and that indoor temperatures match your thermostat settings successfully.