Faq

Frequently Asked Questions

What is an air source heat pump (ASHP)?

An air source heat pump is a low-carbon heating system that extracts heat from the outside air—even in cold weather—and uses it to heat your home and hot water. It works similarly to a refrigerator in reverse.

How efficient are air source heat pumps?

ASHPs are very efficient. For every 1kW of electricity they use, they can generate 3–4kW of heat. This makes them up to 300–400% efficient compared to traditional gas or oil boilers which are typically around 90% efficient.

What is the difference between a ground source and air source heat pump?

Ground source heat pumps (GSHPs) absorb heat from the ground outside your home, whereas air source heat pumps (ASHPs) absorb heat from the air.

ASHP’s can be simpler and cheaper to install than GSHPs, but they are often less efficient due to the temperature variations of the outdoor environment.

Will an air source heat pump work in cold weather?

Yes. Air source heat pumps can work in temperatures as low as -15°C. They are designed to operate efficiently in the UK climate year-round.

Are there any grants or financial incentives available?

Yes. In the UK, you may be eligible for the Boiler Upgrade Scheme (BUS) which offers a £7,500 grant towards the installation of an air source heat pump. We can help you through the application process.

Do I need underfloor heating or special radiators?

While ASHPs work best with underfloor heating or oversized radiators, they can be integrated with existing systems depending on their output and condition. We’ll assess your home and advise on the most efficient setup.

How long does installation take?

Typical installation takes 3 to 5 days, depending on the size and complexity of the system. We aim to minimise disruption and ensure everything is running smoothly before we leave.

Are ground source heat pump systems easy to maintain?

Heat pump systems are a lot easier to maintain than combustion heating systems.

A typical ground source heating system requires a professional service every year. Such regular maintenance is enough to make the system operate for 25 years or more.

Are ground source heat pumps noisy?

A ground source heat pump is no noisier than a modern boiler. When an older boiler starts up or the external flue goes, both these sounds are louder than a ground source heat pump.

Are there any grants to help with the cost of installing a heat pump system?

The Boiler Upgrade Scheme (BUS) is a government-funded subsidy that provides an upfront grant of £7,500 to support the installation of heat pumps. This is available to all homeowners.

Visit our Grants & incentives page for more information.

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"Huge difference to our energy bills!"
We had an air source heat pump installed earlier this year by Tag Renewables, and we couldn't be happier. The house stays warm and comfortable even on colder days, and we’ve already noticed a big drop in our energy bills. It’s also reassuring to know we're using a more environmentally friendly system. The installation was smooth, and the team were professional from start to finish. Highly recommend making the switch!

— Sarah & Mark J., Gloucestershire

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"Outstanding service from start to finish!"
We recently had an air source heat pump installed by Tag Renewables and I can't praise the team enough. From the initial quote to the final handover, they were professional, knowledgeable, and genuinely helpful. They took the time to explain everything clearly and made the whole process stress-free. The system works brilliantly, and it's clear these guys really know what they’re doing. If you're thinking about going renewable, don’t go anywhere else — Tag Renewables are the best in the business!

— James H., Stroud