Depending on the design, they must past at least 20 years 3, and there’s normally no need to have for replacement components through their life time. A quick once-a-year assistance really should maintain it Doing the job Fortunately for many years to return. You'll need Room - outside the house https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/