COMPREHENSIVE GUIDE TO ASHP’S BY SMARTGAS SOLUTIONS

Need Any More Info On ASHPs?
REACH OUT TO THE TEAM
Are Air Source Heat Pumps A Real Alternative?
SmartGas Solutions is your trusted provider for all your heating needs in Edinburgh. From installations to repairs to emergencies, our qualified heating engineers are ready to keep your home’s heating system running efficiently. We handle everything from minor jobs to major installations, ensuring reliable service for homeowners throughout Edinburgh. In this guide, we explore ASHPs as an alternative to more common heating systems and give you advice should you consider going down this route.
WHAT’S THE HYPE ABOUT ASHP’S?
Today, air source heat pumps (ASHPs) are some of the most popular choices for heating and cooling homes. They are efficient and effective and can heat water and air in ways other systems can’t. They are such a hot topic because the UK Government is on a mission to achieve a net-zero future, which includes phasing out fossil fuel boilers by mid-2030.
The problem is that they’re often misunderstood, and most people have more questions than answers. So, here at SmartGas, we’ve put together some information we hope you’ll find helpful.
To help in your research, here are the questions we will be answering:
1. What is an air source heat pump?
2. How does an air source heat pump work?
3. Are air source heat pumps cost-effective?
4. Can air source heat pumps heat hot water?
5. Do air source heat pumps work in cold weather?
6. How much is an air source heat pump?
What Is An Air Source Heat Pump?
An air source heat pump is a mechanical unit (like the air conditioning unit you see when you go on holiday!) that usually sits at a pre-determined location outside your home or property.
There are two main types of air source heat pumps (ASHP):
- Air-to-water system
- Air-to-air system
An air-to-water source heat pump transfers heat from the outside air to water, heating your rooms via underfloor heating or radiator, otherwise known as your wet central heating system. It can also heat water stored in a hot water cylinder for baths, showers and hot taps.
An air-to-air setup starts in the same way, transferring the heat from air outside but this time around it transfers that air to ducting which supplies the heat via a fan outlet to heat rooms directly. It can work in reverse by providing cool air in the summer, not that we need much in Scotland! It’s worth noting that these systems won’t supply hot water like an air-to-air setup so an alternative like a hot water cylinder with an electric immersion heater will be required.
How does an air source heat pump work?
It is sometimes helpful to think of the ASHP as a fridge working in reverse to help one understand its inner workings.
Air-source heat pumps absorb heat from the air outside into a fluid called refrigerant. To increase the temperature of this fluid, it needs to be compressed (thermodynamics). This heat is then transferred through the heat exchanger to heat the water, which then provides heating and hot water to your home.
Heat pumps can extract heat from air temperatures as low as -15 degrees Celsius, providing heating and hot water all year round. The only electricity used by the heat pump is to run the compressor and circulating pump, allowing it to transfer more heat into your home than it takes to run.
Are air source heat pumps cost effective?
You may now be considering the cost of the setup and the cost of running it.
The cost of an air-source heat pump can vary depending on its size, the size of your property, and whether you need to change how you distribute heat around your home. To keep installation costs lower, the best time to consider installing these types of systems would be when you’re already renovating or extending them.
Considering the cost of running an ASHP can be a whole other subject, so we will make it super simple.
This is based on three main factors:
- The COP of the unit (coefficient of performance)
- The heat requirement for your property
- The outside temp of the heat source itself
Generally speaking, an ASHP will be cheaper to run if you’re purely using it for space heating (as your central heating system) compared to an A-rated Gas Boiler. If it’s also used for hot water, it tends to be more expensive to run, and the main reason for this is the maximum heat it can generate.
Air-source heat pumps generally produce a maximum heat of 50 degrees Celsius. To bump that figure up to, say, 60 degrees, more electricity will be needed to heat the water, and therefore, running costs will increase.
To make it more appealing, the government has to develop a way for more people to transfer to this type of energy generation; therefore, you can reduce the cost through a government grant.
Can the air source heat pump heat hot water?
It’s a valid question and boggles the mind how air heats water, especially at higher temperatures like 50 degrees…
The simple answer is YES.
The process described above involves taking the latent heat from the air from outside, compressing it (heating it), and then exchanging/passing heat to warm the water within a cylinder tank. The water in your tank will heat up over time and be ready when needed. Of course, you must remember that the tank will fill with cold water, which needs to be heated once more.
This is the main difference between an air source setup and a combi boiler, as the latter provides hot water on demand.
Do air source heat pumps work in cold weather?
It’s fair to say, “But if it works by taking the heat out of the air, how will it work in cold temperatures”?
Air Source Heat Pumps operate at optimal levels down to around 7 degrees Celsius. As the temperature drops, the heat pump has to work harder to heat the air (using more electricity), but it can do this down to -15 degrees Celsius and still work fine.
So yes, it does work in cold weather, but it’s not as efficient as when outside temperatures are higher. Technology is always advancing, so it will undoubtedly become more efficient over time.
How much is an air source heat pump?
It’s fair to say you will pay more for an ASHP than a gas boiler.
Typical setup costs range from £6000 to £15000.
However, when you compare it to a Ground Source Heat Pump, which can cost between £22000 and £30000, you might see why they tend to be the preferred choice when considering heat pumps in general.
As the demand for ASHP goes up along with the supply and the Government pushes its agenda towards net zero, it’s safe to say this should drive the price down.
Summary Of Air Source Heat Pumps
It’s safe to say there’s a lot to consider when deciding whether or not to install an Air Source Heat Pump in your home or property.
They are definitely going to be a thing of the future as the world tries to overcome its addiction to fossil fuels. However, new technologies around hydrogen gas as a fuel could become a player within our gas boilers.
Boiler manufacturers are making sure they work with both natural gas and hydrogen, as they will see the rising demand for ASHPs as a threat to their business, which is understandable.
Generally speaking, if your property is well insulated, set up to integrate with an ASHP setup, or you’re about to embark on redevelopment work, then it’s definitely worth checking them out.
We hope you found this article valuable. Although SmartGas does not actually supply or install ASHPs, it’s something that is on our radar. We appreciate that customers want a choice when heating their homes, and we want to train our engineers to offer this service in the future. As you will appreciate, this may take some time, but we will update our site when that time comes.
Frequently Asked Questions About Air Source Heat Pumps
How long does an air source heat pump last?
Air-source heat pumps generally have a lifespan of 15-20 years. With proper maintenance, some units can even exceed this range. Their longevity makes them a solid long-term investment compared to traditional heating systems.
Are air source heat pumps noisy?
While some air source heat pumps can produce noise due to the fan and compressor, modern units are designed to minimise noise levels. The sound is typically similar to a refrigerator or air conditioning unit and can vary depending on the model and location.
Do I need planning permission to install an air source heat pump?
In most cases in the UK, air source heat pumps fall under Permitted Development Rights, meaning you don’t need planning permission. However, there are certain conditions—such as proximity to property boundaries and noise levels—so it’s always wise to check with your local council first.
Is my home suitable for an air source heat pump?
The suitability of an air-source heat pump largely depends on factors like insulation quality, property size, and existing heating systems. Homes that are well-insulated and have a suitable space for the outdoor unit tend to benefit most from air-source heat pumps.
Can I use an air source heat pump with my existing radiators?
Yes, air-source heat pumps can work with existing radiators, but it’s important to note that they generally operate at lower temperatures than traditional gas boilers. Larger or upgraded radiators may be required to efficiently heat your home, especially if your current radiators were designed for high-temperature systems.
How do air source heat pumps affect energy bills?
While air-source heat pumps can lower your heating costs compared to electric heating or older inefficient boilers, the impact on your energy bill depends on insulation, the tariff used, and the pump’s efficiency. They may result in higher electricity use due to the need to run the compressor, which is often offset by the overall savings on heating fuel.
What maintenance is required for an air source heat pump?
Air-source heat pumps require relatively low maintenance compared to other heating systems. However, to ensure they operate efficiently and without issues, it’s important to clean the unit’s filters, keep the outdoor unit free from debris, and arrange an annual professional service.
Can an air source heat pump work in combination with solar panels?
Yes, air-source heat pumps can work very effectively when paired with solar PV panels. The electricity generated by solar panels can help power the heat pump, reducing running costs and making heating even more environmentally friendly.
Will an air source heat pump increase the value of my property?
With the growing emphasis on energy efficiency and sustainable homes, installing an air-source heat pump can potentially increase your property’s value. Buyers are increasingly interested in homes with low energy bills and eco-friendly heating solutions.
Can air source heat pumps be used in flats or apartments?
While it is possible to install an air-source heat pump in a flat or apartment, certain challenges—such as limited outdoor space and proximity to neighbours—may require alternative solutions or a more specialised installation approach. Heat pumps are generally more suitable for properties with sufficient outdoor space for the unit.
Are air source heat pumps reliable for year-round use in Scotland?
Yes, air-source heat pumps are reliable year-round, even in Scotland’s climate. They are designed to work in sub-zero temperatures, with modern units functioning effectively down to -15°C. While efficiency may reduce slightly in colder temperatures, the units still provide sufficient heating throughout winter.
Can I use an air source heat pump for underfloor heating?
Air source heat pumps are highly compatible with underfloor heating systems. Underfloor heating works efficiently at the lower flow temperatures provided by air-source heat pumps, making it a great pairing for maximizing energy efficiency and comfort.
Do I need to upgrade my home's insulation before installing an air source heat pump?
To get the most out of an air-source heat pump, your home should be well-insulated. Poor insulation will reduce the heat pump’s efficiency and increase running costs. Improving insulation before installing a heat pump is often recommended to maximise the benefits.
What happens if my air source heat pump breaks down?
If an air source heat pump breaks down, contact a qualified repair technician. Regular maintenance can prevent many common issues. Additionally, most heat pumps have manufacturer warranties that can cover repair costs for several years after installation.
FIVE Star Service
We’re not happy until you’re happy. At SmartGas, we intend to keep our 5-star reputation.
Professional Engineers
We pride ourselves on our fully qualified engineers. We never sub-contract our work.
Licence & Insured
As you’d expect, we don’t cut corners and make sure all our customers are protected.
Contact SmartGas Solutions for Expert Heating Services
Whether you need a new central heating system, repairs, or expert advice, SmartGas Solutions is here to help. Based in Edinburgh, we specialise in providing high-quality heating solutions tailored to your home’s unique needs. Contact us today for a free consultation or a quote!
Accredited Central Heating Installers
SmartGas is accredited by Worcester Bosch and Ideal, meaning we meet the highest standards in boiler installation, central heating installation and service quality.
Local Expertise
Based in Edinburgh, we know the local area and understand the specific heating needs of homes in Scotland.
Highly Skilled Engineers
All our engineers are Gas Safe Registered and undergo regular training to stay updated on the latest technologies and systems.
Customer-Focused Service
We pride ourselves on our friendly, professional approach, ensuring complete satisfaction for every customer.
Trusted Local Company
With years of service in Edinburgh, we’ve built a reputation as a trusted local heating company backed by Edinburgh Trusted Trader and Which Trusted Trader. Our focus is always on delivering quality workmanship and excellent customer service.
Which Trusted Traders
Trusted Traders is an endorsement scheme for trade services that recognises reputable traders who successfully pass an assessment process carried out by our trading standards professionals.
Edinburgh Trusted Trader
Smart Gas Solutions is proud to be an Edinburgh Trusted Trader. This is the official “go-to” list of Trading Standards Trusted Traders, backed by The City of Edinburgh Council and supported by Police Scotland.
GAS SAFE™
Smart Gas Heating & Plumbing are Gas Safe registered. Gas Safe Register is the official register for engineers who are legally permitted to carry out gas work.
SNIPEF™
Using a SNIPEF Licensed Plumber gives you peace of mind that you are choosing a plumbing business which uses properly trained and qualified operatives.
Boiler Brands We Work With
We Service All Makes & Models
GET IN TOUCH
Contact us anytime by phone, email, or our website forms. We’re ready to answer your questions.