Switch to a Greener Future with Air Source Heat Pump Solutions
Get a 100% FREE Air Source Heat Pump! Fully covered by the government grant – Limited to the first 50 installations!
We take care of everything – from installation to handling your government grant application. No hassle, no cost!




Why Switch to an Air Source Heat Pump?
From saving on your energy bills to contributing to a greener planet, Air Source Heat Pumps are the future of sustainable home heating.
Energy Efficiency
Heat pumps consume significantly less energy than traditional heating systems, helping you save on your energy bills.
Eco-Friendly
By utilising renewable energy from the air, heat pumps help reduce carbon emissions and contribute to a greener environment.
Affordable
Save £10,000 before the offer ends! Benefit from up to £7,500 in government aid, making the switch more affordable.
Year-Round Comfort
Heat pumps provide efficient heating in winter and hot water throughout the year, ensuring optimal comfort for your home.
Low Maintenance
Air-to-water heat pumps need little maintenance, have long lifespans, and offer reliable performance with remote monitoring and diagnostics.
Increased Home Value
Installing energy-efficient systems like heat pumps can boost property value, making it an attractive investment for homeowners.
Why Choose Cosy Castle?
Our solutions don’t just heat your home – they transform it into a smart, energy-efficient haven that provides continuous comfort, whether you need heating or hot water.

State-of-the-Art Heat Pump System
Our 3i air-to-water heat pump is built with state-of-the-art technology. At 7°C outside temperature, it delivers 4.9 times more energy than the electricity it consumes to heat water to 32 degrees, and 3.77 times more energy for a 55°C water temperature. This ensures optimal efficiency and significant cost savings. This advanced system is designed to deliver reliable, energy-efficient heating for your home.
Equipped with inverters, our Air Source Heat Pump (ASHP) systems dynamically optimise energy usage.
Additionally, our innovative 3i Box enables quicker installation, enhances system efficiency, and offers remote diagnostics for effortless monitoring and maintenance.
Smart Remote Control & Energy Monitoring
Control your heat pump remotely with our user-friendly app, track energy consumption in real-time, and receive personalized insights. Our team monitors your usage to help you optimise efficiency and maximise savings, ensuring your system is always performing at its best.


Expert Installation for Maximum Efficiency
Our team of expert installers ensures your heat pump is integrated seamlessly with your home’s existing system for maximum efficiency and performance, ensuring long-term energy savings.
Thanks to our 3i Box and experienced team, the installation process is quick and hassle-free, minimizing disruption to your daily life.
Our Air Source Heat Pump Value Offer
From £0
Get an Air Source Heat Pump worth £12,000 at no cost to you!*
*After the Boiler Upgrade Scheme grant: £7,500
& Cosy Castle discount: £4,500 (Limited offer for the first 50 installations)
Client Testimonials
Hear from our satisfied customers about their experience with Cosy Castle.
Frequently Asked Questions
Is my home suitable for a heat pump?
Our free survey includes a detailed heat loss analysis of your home, ensuring your insulation renders your home suitable for a heat pump installation. This will let you know whether changes are required. We can provide you the necessary solutions if that’s the case, if you are willing to proceed.
Will my energy bills go up?
Whether your bills increase depends on several factors, including the correct installation of a properly sized system. Many installers fail to match the right heat pump to a home’s specific needs. At Cosy Castle, we conduct a thorough heat loss analysis and tailor the system to your home, ensuring maximum efficiency. Our expert team also guides you on proper usage and monitors your system to help you optimize savings. All our clients have seen reductions in their energy bills thanks to these measures.
Do I need bigger radiators?
With our careful sizing process, we ensure that the correct system is installed to meet your specific needs, eliminating unnecessary costs or inefficiencies.
What makes your air to water heat pump system different?
Our ASHP systems are equipped with inverters to optimize energy usage. With the 3i Box, you can remotely monitor and adjust your system for peak efficiency.
How does Cosy Castle help with government grants?
Cosy Castle handles the entire paperwork process for government grants and applies on your behalf, ensuring that you receive the maximum financial aid available for heat pump installations. You only pay the final price with the grant already factored in.
How long does installation take?
The installation typically takes 1-2 days, depending on the complexity of your system. Our expert team ensures minimal disruption to your home.
How much space do I need for the installation?
Thanks to the compact design of our systems, we require minimal space. The 3i Box is designed to save space while ensuring leak-proof and efficient performance.
What happens after installation?
We offer remote monitoring and support, helping you configure the system for your home and unique needs and making adjustments as required.
Do I need to change my habits?
Yes, using a heat pump differs slightly from a boiler. It’s more about maintaining a consistent temperature rather than short bursts of heat, which is more energy-efficient.
Is the installation process disruptive?
No, thanks to our quick and efficient process, installation is completed with minimal disruption, allowing you to enjoy your new system sooner.
How much money can I save on energy bills?
With our ASHP systems, customers typically save between 30-50% on their energy bills, depending on usage and home insulation levels.