Because a heat pump has few moving parts, there is little wear-and-tear on the equipment. So you can expect an air source heat pump to operate effectively for ten to twenty years. As with a gas boiler, an annual service is recommended, and this can be arranged with your installer.
Heat pump systems are designed to run at lower temperatures than a traditional gas boiler. This means they deliver heat steadily and comfortably across the day, with no significant rise-and-fall in temperatures that can happen with gas boilers, for example, providing a steady and reliable indoor temperature.