How to use an Air Source Heat Pump

An air source heat pump (ASHP) keeps your home warm and covers your hot water needs. However, it works slightly differently to a typical central heating system.

Don’t worry if you’re not quite sure how to use it – this guide will help you get the most out of your ASHP.

How does an Air Source Heat Pump work?

An air source heat pump takes warmth from the air outdoors, boosts it, then lets us use that heat indoors. Even if the outdoor temperature drops below freezing, the heat pump can still comfortably heat your home. 

Most air source heat pumps in Scotland are air-to-water types. This means the hot air from the heat pump heats up water. This warm water runs through the pipes in your radiators, warming them up. It can also heat a hot water tank to provide hot water for your kitchen and bathroom.

Air source heat pumps need some electricity to make them work. You can keep the cost of this electricity down by: 

• Using your heating efficiently 
• Making sure you’re on the right electricity tariff 

A more detailed explanation of how air source heat pumps work can be found in our air source heat pump guide.

How do I use my heating?

When your air source heat pump was new, the installer should have set it up to work efficiently. This means you shouldn’t need to worry about any of the settings. 

Your heat pump doesn’t work well when it’s being switched on and off a lot. It works best (and costs less to run) when you have the thermostats set for comfortable temperatures providing a consistent temperature.  For example, you might want your living room temperature to be 21 degrees and your bedroom set for 18 degrees. 

Hjaltland Housing Association can arrange a technical induction visit to show you how to set up your heating. You can call 01595 694986 to book a visit.

Electricity tariffs

An electricity tariff sets the price you pay per unit of electricity you’ve used. With most tariffs, electricity is the same price throughout the day. This is usually the best type of tariff for an air source heat pump. It’s known as a ‘single rate tariff’.

Hot water tank

Unlike some other central heating systems, an air source heat pump with an integrated hot water tank cannot produce hot water ‘on demand’. As a result, your hot water will be stored in a hot water tank. This is usually found in a cupboard. The hot water will be between 40 and 55°C. Once a week, your heat pump will heat the tank to 60°C. This makes sure there are no health risks to you from the water.