Cylinders

Can I use my existing cylinder when I have an ASHP fitted?

If you’re looking at using your heat pump for heating hot water and your home, depending on your existing system you may need to have a new cylinder installed as well.

This is because current cylinders like the one you might have with your current system aren’t often suitable for the lower flow temperatures that heat pumps work at. Our range of air source heat pump cylinders have a larger coil to maximise heat transfer and heat your hot water quickly and efficiently. 


If you have a combi boiler and are looking to switch to a heat pump, you will need a new cylinder as your current heating system does not rely on one.


Alternatively, you may be able to combine this with your new heat pump in a hybrid system, where the boiler heats your water and the heat pump provides warmth for your home. You can also use a pre-plumbed hot water cylinder if you have limited space in your property. 

Baxi heat pumps

Our air source heat pumps will deliver reliable, energy-efficient performance. Suitable for a wide range of properties.

Find an installer

Simply enter your postcode and find a local, trained, Gas Safe registered (where applicable) engineer to give you a no-obligation quote on a new boiler, cylinder or air source heat pump installation.

Related FAQs

Can an air source heat pump be moved after installation?

Generally speaking, your heat pump will not be able to be relocated after an installation. If you’re planning any renovations to your home, consider having these done as part of the installation process.

Will I need a hot water cylinder with my air source heat pump?

You will need to have a compatible cylinder to work with your air source heat pump, unless you are looking at using a hybrid system.

Do you need planning permission for an air source heat pump?

Typically, you will not need planning permission to have a heat pump installed, as this typically comes under permitted development rules. Certain requirements may apply for homes in conservation or built-up areas. 

Will an air source heat pump work while I am on holiday?

You can use the Holiday Mode function on your heat pump to ensure that it functions at a low level while you’re away. As heat pumps work best when they are allowed to work continuously, this function will maintain its overall efficiency and effectiveness, keeping it in optimum working condition.