In the pursuit of a sustainable future, the transition away from fossil fuels and towards renewable energy sources like Air Source Heat Pumps (ASHPs) and Ground Source Heat Pumps (GSHPs) is accelerating. These technologies offer a pathway to reduced carbon emissions and long-term cost savings, but maximising their efficiency is paramount for successful widespread adoption. A critical factor in achieving peak performance lies in understanding and controlling system running temperatures.

Operating heating systems at lower temperatures offers a cascade of benefits. It directly improves the efficiency of the heat pump itself, reducing the energy required to generate heat. This, in turn, translates to lower energy consumption overall, contributing to both environmental sustainability and reduced energy bills. However, the transition to lower temperatures isn’t as simple as turning down the thermostat.

The Challenge of Low-Temperature Heating:

The challenge arises because traditional heating systems, designed for higher temperatures, may struggle to deliver sufficient heat when operating at lower levels. Smaller radiators or underfloor heating loops, common in older homes, might not have the surface area required to effectively warm a room at lower temperatures. This can lead to uncomfortable living spaces, forcing homeowners to compensate by increasing the thermostat setting, negating the efficiency gains of the heat pump and potentially driving up energy costs.

The Importance of Proper System Design:

The key to unlocking the true potential of low-temperature heating lies in holistic system design. It’s not enough to simply swap out a boiler for a heat pump. A comprehensive assessment of the entire heating system is crucial. Accurate heat loss calculations are essential to determine the precise heating requirements of each room. This data informs the appropriate sizing and spacing of heat emitters, ensuring adequate heat output even at lower temperatures. Oversizing radiators or strategically placing underfloor heating loops can compensate for the reduced heat output at lower temperatures.

Furthermore, insulation plays a vital role. Often, especially in renovation projects, improving the thermal envelope of the building through better insulation is even more impactful than simply upgrading the heating system. Reducing heat loss through walls, roofs, and windows allows the heating system to work less, regardless of its operating temperature. This synergistic approach – combining efficient heat generation with minimised heat loss – is the most effective way to achieve both comfort and energy savings.

Multipipe’s Commitment to Excellence:

At Multipipe, we understand the intricacies of low-temperature heating and the critical role of proper design. We’re committed to empowering installers and homeowners with the knowledge and tools they need to make informed decisions. That’s why we offer comprehensive underfloor heating courses throughout the year, equipping installers with the latest techniques and best practices.

Building on our commitment to excellence, we’ve also launched a comprehensive underfloor heating design service. Our team of experienced engineers uses advanced software and industry best practices to meticulously calculate heat loss for each property. This detailed analysis allows us to design bespoke underfloor heating systems perfectly sized and optimised for low-temperature operation.

The Multipipe Advantage:

Our design service offers a multitude of benefits:

• Optimised System Performance: Our designs guarantee your heating system operates at peak efficiency, even at lower temperatures. We consider all relevant factors, including room size, insulation levels, and window placement, to ensure optimal heat distribution and comfort.
• Reduced Energy Consumption: Lower running temperatures directly translate to lower energy bills and a smaller carbon footprint. By maximising the efficiency of your heating system, you’ll save money and contribute to a more sustainable future.
• Enhanced Comfort: A properly designed underfloor heating system delivers consistent and comfortable temperatures throughout your home. Say goodbye to cold spots and uneven heating!
• Peace of Mind: Our expert design service provides peace of mind, knowing that your heating system is designed correctly. We’ll guide you through the process, answer your questions, and ensure you’re completely satisfied with the results.
• Cost-Effective Solution: While there is a cost associated with the design service, it’s an investment that pays off in the long run. By optimising your system’s performance and preventing costly mistakes, you’ll save money on energy bills and avoid expensive repairs down the line.

Partnering for a Sustainable Future:

The transition to low-temperature heating systems is a crucial step towards a more sustainable future. At Multipipe, we’re proud to be at the forefront of this movement, providing innovative products, expert training, and comprehensive design services. We believe that by working together – manufacturers, installers, and homeowners – we can create comfortable, energy-efficient homes that are both environmentally responsible and cost-effective.

Contact Multipipe today to learn more about our underfloor heating design services, our training programs, and how we can help you achieve optimal comfort, efficiency, and sustainability in your next project. Let us help you unlock the full potential of low-temperature heating and create a home you can be proud of.

This article originally featured in the March 2025 issue of APHC.