Air source heat pump systems usually come with a warranty of two or three years, with workmanship warranties extending this up to 10 years (although many manufacturers also offer warranty extension options for an additional fee). With regular maintenance, you can expect your ASHP to operate for around 20 years and in some cases even longer. A routine check by yourself on a yearly basis and a more thorough and in depth check by a professional every 3 to 5 years should suffice for this.
Your installer should keep and leave written details of any maintenance checks that you should be taking to ensure that everything is working correctly. On a yearly basis, you will be advised to carry out a yearly check on the air inlets and evaporator to make sure that they are free of leaves and other debris, as well as removing any plants that have started or continued to grow near the pump. You may also be advised to check you central heating pressure gauge from time to time and to use anti-freeze to prevent the ASHP from freezing over during winter.
How much you are likely to save will be fully dependent on the system that you currently use, as well as the system that you plan on replacing it with. This will be affected by factors such as;
- Your heat distribution system: If you can manage to be able to install it, underfloor heating can be much more efficient than radiators are due the water not requiring as much heat, however if this isn’t possible then it is advisable to use the largest radiators that you can.
- Cost for fuel: Because an air source heat pump still uses electricity to run, you will still need to pay fuel bills, however you will save money on the fuel that you are replacing.
- Your current heating system: If your current heating system is older than it may be inefficient and you will be likely to see lower running costs with a newer heat pump.
- Water heating: If your heat pump is being used to provide hot water, this could limit its overall efficiency levels. You may want to consider solar water heating as am additional option to provide hot water during the summer months and keep your ASHP efficiency high.