How do air source heat pumps work?

If you’re trying to find ways to make your home more energy efficient and reduce your carbon footprint, air source heat pumps (ASHPs) might already be on your radar. But how exactly do they work, and what makes them such a great choice for both your home and the environment? Let’s break it down.

Key takeaways

• The basics of air source heat pumps
• How do heat pumps work?
• Types of air source heat pumps
• Why choose an air source heat pump?
• Is your home suitable for an air source heat pump?
• Why now is the perfect time to install

The basics of air source heat pumps

Air source heat pumps extract warmth from the outside air – even in colder climates – and use it to heat your home or provide hot water. They’re powered by electricity, but their efficiency lies in how much heat they produce compared to the electricity they use. Put simply, they generally produce around three times more energy than they consume, meaning they’re about 300% efficient!

Think of them as reverse air conditioners. Where an air conditioner removes heat from your home to cool it, an air source heat pump captures heat from outside and transfers it indoors.

How do heat pumps work?

Air source heat pumps rely on a few key components:

Outdoor unit

The outdoor unit is where the magic begins. It contains a fan that draws in air and transfers its heat to a refrigerant (a substance that absorbs heat) within the system.

Heat exchanger

The refrigerant absorbs this heat energy and evaporates into a gas. The heat exchanger then compresses the gas, increasing its temperature.

Heat output

The heat is transferred to your home’s central heating system, such as radiators, underfloor heating, or even to heat hot water. The refrigerant cools back into a liquid, ready to repeat the cycle.

Types of air source heat pumps

There are two main types of ASHPs, each designed for specific needs:

1. Air-to-water heat pumps –These pumps connect to your home’s water-based central heating system and are great for providing both space heating and hot water. They work best in well-insulated homes with low heat loss to maximise efficiency.
2. Air-to-air heat pumps – These pumps deliver warm air through fans, much like an air conditioner but for heating. However, they don’t provide hot water, making them better for homes where heating is the priority.

Why choose an air source heat pump?

Air source heat pumps are a great choice for many homes, here’s why:

1. Energy efficiency

Air source heat pumps are incredibly energy efficient, especially when compared to traditional gas boilers or fossil fuel boilers, and can even work effectively in freezing conditions.

2. Lower running costs

Although the upfront installation costs can be higher than a traditional boiler, ASHPs have lower running costs, particularly in homes that are already well-insulated.

3. Reduced carbon emissions

Switching to a heat pump can seriously cut your home’s carbon emissions, helping you do your part for the environment. And because they use renewable sources (the air!) instead of fossil fuels, they’re a cleaner, greener choice.

4. Government-backed support

Initiatives like the Boiler Upgrade Scheme offer grants to offset installation costs. You could get up to £7,500 to help make this sustainable choice even more affordable.

Is your home suitable for an air source heat pump?

Air source heat pumps are versatile, but there are a few things to keep in mind:

• Outdoor space: You’ll need room for the outdoor unit, ideally near your home and on solid ground.
• Insulation: Homes with high heat loss won’t benefit as much from an ASHP. Consider upgrading your insulation first for maximum efficiency.
• Planning permission: Most installations don’t require planning permission, but it’s always worth checking local guidelines, especially if you live in a conservation area.
• Central heating system: ASHPs work best with systems designed for lower flow temperatures, such as underfloor heating or large radiators.

Why now is the perfect time to install

With rising energy prices and increasing awareness about climate change, there’s never been a better time to consider an air source heat pump. The availability of government-backed schemes, like the Boiler Upgrade Scheme, means that upfront costs are more affordable. Plus, advancements in heat pump installations mean systems are more efficient and suitable for a wider range of homes than ever before.

Ready to make the switch?

At Grant Store, we specialise in helping homeowners like you make the switch to air source heat pumps. Whether you’re wondering about the best system for your home, the installation process, or how to access government-backed schemes, we’re here to guide you every step of the way.

Get in touch with us today to discuss your heating needs and take the first step toward a greener, more energy-efficient home!