New Heating System Installed for Harpenden Home
A Modern Heating Upgrade Designed for Year-Round Comfort
A new heating system installed in Harpenden. CosyHome specified and fitted a Stiebel Eltron air source heat pump to deliver a cleaner, smarter alternative to standard gas heating. To make the renewable technology work efficiently, we laid underfloor heating across the entire ground floor to act as a thermal mass, supported by high-output radiators upstairs.
As more Hertfordshire residents look to exit the gas grid, this project proves how correct system design controls energy bills while minimising environmental impact.
The Project Overview
Why the Homeowners Chose a Heat Pump
Air source heat pumps have become one of the most effective renewable heating technologies available for UK homes. Rather than generating heat through combustion, they extract renewable heat energy from the outside air and transfer it into the home’s heating and hot water systems.
For this Harpenden property, a heat pump offered several key advantages:
Improved energy efficiency
Heat pumps are capable of producing multiple units of heat energy from each unit of electricity consumed, making them significantly more efficient than traditional heating methods.
Lower carbon emissions
As the UK’s electricity grid continues to become greener, heat pumps offer an increasingly sustainable way to heat homes.
Excellent compatibility with low-temperature heating systems
Heat pumps perform particularly well when paired with underfloor heating and appropriately sized radiators, making them an ideal choice for modern heating designs.
Future-ready technology
With growing demand for renewable heating solutions, installing a heat pump helps homeowners prepare for the future while increasing the appeal of their property.
Installing the Stiebel Eltron Heat Pump
Precise positioning of the outdoor installation ensures that the unit has the clear intake area necessary for peak efficiency. We chose Stiebel Eltron because their units rely on industrial-grade components built for decades of operation, bypassing cheaper alternatives.
This external monobloc unit drives the entire heating strategy. It extracts raw thermal energy from the ambient outdoor air, compressing it to deliver high-grade heat directly into the home’s underfloor and radiator networks.
Careful placement was essential to ensure:
- Good airflow around the unit
- Easy future maintenance access
- Minimal visual impact
- Efficient operation throughout the year
Once installed, the heat pump was connected to the internal heating system and commissioned to deliver optimal performance.
Creating an Efficient Plant Room
Inside the property, our team installed a complete plant room arrangement incorporating the hot water cylinder, pumps, controls, expansion vessels and heating distribution equipment.
The pipework installation was designed to achieve both functionality and a neat, professional finish.
A well-designed plant room plays a crucial role in ensuring a heat pump system operates efficiently. Every component must work together to manage heating demands, hot water production and system circulation.
The finished installation provides:
- Reliable hot water storage
- Precise temperature control
- Efficient water circulation
- Easy servicing access
- Long-term system reliability
Attention to detail during this stage is essential, as the quality of the installation directly affects performance and efficiency over the lifetime of the system.
Combining Underfloor Heating and Radiators
One of the key aspects of this project was creating a system that could effectively serve two different heating methods.
Downstairs Underfloor Heating
The ground floor was fitted with a water-based underfloor heating system, connected through a dedicated manifold arrangement.
Underfloor heating works exceptionally well alongside heat pumps because it operates at lower flow temperatures. Instead of concentrating heat in specific locations, it distributes warmth evenly across the floor surface, creating a comfortable and consistent indoor environment.
Benefits include:
- Even heat distribution
- Comfortable room temperatures
- Improved energy efficiency
- Reduced cold spots
- Greater usable wall space
Upstairs Radiators
While underfloor heating was the ideal choice downstairs, radiators remained the most practical solution for the first floor.
Modern heat pump systems can work extremely effectively with radiators when they are correctly specified and sized. Heat pump-compatible radiators provide efficient heat output while operating at the lower temperatures preferred by renewable heating systems.
This hybrid approach allows homeowners to enjoy the best of both worlds.
A Seamless Installation from Start to Finish
At CosyHome, every project is approached with the same goal: delivering a heating system that is tailored to the property and the people living in it. From initial consultation through to final commissioning, our team managed every aspect of this Harpenden installation, ensuring the finished system met the highest standards of workmanship and performance.
The completed project demonstrates how modern renewable heating technology can be integrated successfully into family homes, providing comfort, efficiency and peace of mind.
This Harpenden installation is an excellent example of how a carefully designed renewable heating system can transform home comfort. By combining a Stiebel Eltron air source heat pump, downstairs underfloor heating, and upstairs radiators, the property now benefits from an efficient, future-ready solution designed to perform reliably for years to come.
If you’re considering upgrading your home’s heating system and would like expert advice on heat pumps, underfloor heating, or renewable heating solutions, contact us today to speak with our team.
