How Long does it Take for an Air Source Heat Pump to have Hot Water?

It usually takes about 2 to 4 hours for an air source heat pump to heat the water to a temperature suitable for bathing. In summer and when a return water device is used, the heating time may be shortened to 1 to 2 minutes. In winter or when the ambient temperature is low, the heating time may be extended to 3 to 5 hours.

This is because the heating time of an air source heat pump varies depending on a variety of factors, including heating capacity, ambient temperature, tap water temperature, and whether a return water device is installed.

If the standard heating capacity is 2.5kW, it takes 3.1 hours to heat to the set temperature, but in winter when the outdoor temperature is low and the tap water temperature is very low, the heating time may even exceed 4 hours.

For an air source heat pump of about 900W, it usually takes about 2 to 4 hours from turning on the machine to heating the water to a temperature suitable for bathing. In summer, a custom heating time is set, and the heating is usually completed in two hours. If you want to save heating time, you can install a return water device, and hot water can be produced in a maximum of 1 to 2 minutes.

Under ideal conditions, such as in summer and when a water return device is used, the heating time may be shortened to 1 to 2 minutes; in winter or when the ambient temperature is low, the heating time may be extended to 3 to 5 hours or even longer.