Heat pumps explained: Everything you need to know

Heat pumps are becoming the go-to choice for a smarter, more efficient way to heat your home for a sustainable future.

One of the most popular heat pump types is air source heat pumps. They extract 75% of their energy from natural sources like air and only require 25% electricity to operate.

Let's go into more detail: Heat pumps use the outside air to regulate your home’s temperature, even in cold weather. It works like a reverse refrigerator, extracting heat from the air and transferring it indoors through a refrigerant cycle. This process is highly efficient, and uses less energy than a traditional gas boiler system.

How do air source heat pumps work?

An air source heat pump works by absorbing heat energy from the outside air — even in cold weather and transferring it into your home. It uses a refrigeration cycle, similar to how your fridge works, but in reverse.

Here’s how: The pump uses refrigerant, a special fluid that changes from liquid to gas at low temperatures. This refrigerant absorbs heat from the air outside through an evaporator, then compresses it to increase its temperature.

The heat is transferred via a heat exchanger to warm your home and provide hot water. The system is powered by electricity but is highly efficient, often delivering more heat energy than the electricity it consumes.

Why a Glow-worm heat pump is a great choice for your home

The GeniaAir is the brand-new air source heat pump from Glow-worm. With a compact design, it delivers reliable warmth and efficiency on the coldest days.

• Energy efficiency - Heat pumps are highly energy-efficient because they don’t generate heat—they transfer it. For every unit of electricity used, a heat pump can produce around four units of heat, making it great choice if you’re looking for a heating system that may support cost efficient home.

• Lower carbon footprint - By using renewable energy from the air, heat pumps help reduce your home’s carbon emissions. When paired with electricity, heat pumps can be a key step toward creating a more sustainable future. Heat pumps can also be paired with Solar PV systems too, so that any solar energy generated can be used directly for your homes heating and hot water.

• Year-round comfort - Heat pumps can provide both heating and cooling, when fitted with the right parts. You can enjoy a warm home in winter and a cool one in summer without needing separate systems, making them the perfect fit whatever the weather.

Thinking about upgrading your home's heating system to a heat pump? Discover the Glow-worm GeniaAir heat pump here.

Things to consider about heat pumps

• High upfront costs - Installing a heat pump can be more expensive than traditional heating systems. However, government incentives, like the Boiler Upgrade Scheme (BUS) can help you save money on the initial cost of your heat pump. You can get a grant of up to £7,500 off the cost of your new air source heat pump. Your installer must be MCS accredited and will apply for the grant on your behalf. Find out more about heat pump funding options here.

• Noise - Some heat pumps produce noise during operation, especially the outdoor unit. However, modern systems are designed to minimise noise, making this less of an issue. The Glow-worm GeniaAir heat pump operates from 49 decibels, meaning it works quietly to heat your home.

How much do heat pumps cost?

The cost of installing an air source heat pump varies depending on the size of your home, the type of system, and installation requirements. On average, you can expect to pay between £7,000 and £13,000 for a standard installation.

While this upfront cost may seem high, it’s important to consider the long-term savings. Heat pumps are highly efficient, and may support lower energy over time. Additionally, government schemes like the Boiler Upgrade Scheme in England and Wales and Home Energy Scotland offers financial support to help reduce installation costs.

Is your home ready for a heat pump?

Thinking about upgrading to a heat pump? Great choice! There are a few things to check to make sure your home is the perfect match. Don’t worry—it’s simpler than it sounds, and we’re here to guide you every step of the way.

• Space available: Got room inside and outside? Heat pumps need a bit of space to work their magic.

• Insulation: A well-insulated home keeps the heat pump efficient and your home cosy all year round.

• Budget: Heat pumps are an investment, but they pay you back with lower running costs over time.

• EPC Rating: A valid Energy Performance Certificate (EPC) helps ensure your home is energy-ready.

• Radiators: Modern radiators or underfloor heating pair beautifully with heat pumps for cosy warmth.