Busting air source heat pump myths

Thinking about upgrading your home's heating? You've probably heard a lot of conflicting stories about air source heat pumps. Here's the truth behind the most common heat pump myths.

• Modern heat pumps move heat rather than burning fuel. They achieve 300% to 400% efficiency, work down to -20°C, and supply both heating and hot water.
• A heat pump installation costs around £11, But government grants of up to £7,500 can help, and pairing them with solar panels lowers bills further.
• These compact outdoor units are roughly the size of two wheelie bins. They rarely need planning permission and require only basic, simple maintenance.

MYTH: Air source heat pumps are noisy

FACT: Modern air source heat pumps are quieter than you think

All heating systems make some noise; however, a modern air source heat pump can actually be quieter than an old gas or oil boiler. Typically, the air source heat pump noise sits between 40 and 60 decibels from one metre away. Of course, the exact heat pump noise level depends on the model you choose and how it’s installed. Once it’s fitted properly, the hum of your heat pump noise won’t disrupt your daily life.

MYTH: Heat pumps are too expensive

FACT: Modern heat pumps work well in freezing temperatures

While we might not be fans of the cold, your air source heat pump is perfectly fine with it. In fact, modern systems can still extract heat from the air in temperatures as low as -20°C. Since UK winters rarely get that cold, you can rest easy knowing you’ll stay warm.

MYTH: Existing underfloor heating and radiators aren't compatible

FACT: Heat pumps can work with your existing setup

While not essential, an air source heat pump and underfloor heating system working together can be incredibly efficient. The heat pump can run at a lower temperature than normal because underfloor heating offers an extensive surface area. A high-temperature air source heat pump can easily connect to your existing radiators, keeping your home warm and cosy.

MYTH: Heat pumps take up too much space

FACT: Heat pumps are relatively small and compact

An air source heat pump is actually relatively compact and can fit easily into whatever space you have. The main part is a single 'monoblock' unit that sits outside. It’s roughly the size of two wheelie bins standing side by side. By choosing the right air source heat pump size, you’ll get a clean, tidy setup.

MYTH: They need regular maintenance

FACT: Heat pump maintenance is simple and highly manageable

Worried that looking after air source heat pumps will be a lot of hard work? In truth, heat pump maintenance is much simpler than caring for a traditional gas boiler. You can easily do a few basic checks yourself once a year, like cleaning the filters. Then, we recommend having a professional service the unit every three to five years to check its performance. These professional visits usually cost around £200. It's a small step to keep your system running smoothly and efficiently for years to come.

MYTH: Heat pumps only provide heating

FACT: Modern heat pumps supply both heating and hot water efficiently

Some people believe that these systems can't handle both your heating and hot water. But a modern air source heat pump is designed to do both brilliantly. They just work a bit differently to traditional boilers. Instead of heating your radiators and taps at the same time, if you turn on a hot tap, it temporarily diverts its power to heat your water. Once you're done, it goes right back to warming your rooms. You'll always have warm water and cosy rooms whenever you need them.

MYTH: Heat pumps can't be powered by solar energy

FACT: Pairing your heat pump with solar panels maximises your savings

Pairing a heat pump and solar panels is actually one of the smartest ways to lower your energy bills even further. The energy your panels generate during the day can power your heat pump directly, and if you add a solar battery, you can store any extra energy to use whenever you need it. By combining these two technologies, you'll rely much less on the grid.

MYTH: Gas boilers run better than heat pumps

FACT: Heat pumps are significantly more efficient than gas boilers

It's a common assumption that gas boilers are more powerful. However, an air source heat pump is actually far more efficient than traditional heating. Gas boilers have to burn fuel to generate heat, and even A-rated boilers lose about 10% of that energy. Heat pumps don't generate heat, they move it. Because of this, for every single unit of electricity you put in, you'll get three to four times as much heat back.

MYTH: Planning permission is required for heat pump installation

FACT: Most installations fall under permitted development

In most cases, you won't need air source heat pump planning permission at all. That's because fitting a heat pump is usually classed as a 'permitted development' in the UK. But there are a few exceptions you should keep in mind. If you live in a listed building or a conservation area, you may need to get approval. It's always a good idea to check with your local planning department before committing to your exciting new project.

Upgrading your home’s heating is a big step, but it doesn't have to be complicated. Now you know the facts, you can see how an air source heat pump can fit into your life. If you're thinking about making your home warmer and more efficient, feel free to learn more about air source heat pumps.