Griff Thomas, Executive Director of Energy Transition and External Affairs at United Infrastructure and Managing Director at GTEC Training
As the push to decarbonise the built environment accelerates, hybrid heating systems are attracting more attention. For the commercial property sector, which is facing tighter carbon targets, rising energy costs, and increasing regulatory pressure, an important question remains: are hybrid systems simply a transitional measure on the road to net zero, or a viable long-term solution in their own right?
In my view, hybrid heating systems are more than just a stopgap. Unlocking their real value depends on a clear understanding of how they work, careful deployment, and aligning them with broader energy and carbon goals.
Understanding hybrid heating systems
A hybrid heating system usually combines a renewable technology (most commonly a heat pump) with a traditional fossil-fuel-based boiler. The system is designed to switch between heat sources to optimise for efficiency, carbon emissions, and cost, depending on demand, external conditions, and energy prices.
In commercial buildings, hybrid systems typically run heat pumps when conditions allow, switching to boilers when demand is high or temperatures drop sharply. While this flexibility is seen as a benefit, it raises debate about whether hybrids offer a realistic approach or delay the switch to full electrification.
Why hybrids matter now
The commercial property sector accounts for a large portion of built environment emissions, and decarbonising heating in this space presents a tough challenge. There are three key reasons why hybrid heating systems have become more appealing for facilities managers, engineers, and sustainability leaders:
1. Practical pathway to reduced carbon emissions
While heat pumps are an efficient renewable option, their performance can suffer in extreme cold and installing them in existing commercial buildings can be complicated and costly. Hybrid systems provide a more pragmatic route, enabling organisations to use heat pumps for a large share of their heating needs while utilising boilers for peak demand.
This step-by-step approach can make a real difference. For buildings with fluctuating or high heat loads, hybrids can significantly reduce emissions today instead of waiting for full electrification to become practical.
2. Mitigating risk and cost volatility
Energy markets are still unpredictable, with gas prices, grid limitations, and balancing costs all putting pressure on commercial energy spend. Hybrid systems help manage this uncertainty by intelligently switching between energy sources to balance costs and performance. As tariffs fluctuate, this adaptability can provide a mix of financial and environmental resilience.
When electricity is cheap, such as when renewable energy is ample, the heat pump does most of the work. When prices go up and demand is higher, the boiler takes over to keep costs down and homes comfortable.
3. Easing the transition to full electrification
Hybrid systems may not be the end goal, but they are an effective way to move forward. They make it possible to phase out fossil heating gradually, spread investment, and give operators space to build confidence with new technologies. This transition aligns more naturally with how commercial organisations tend to manage budgets and risk.
Rather than an all-or-nothing shift to electrification, hybrids offer a sensible middle ground that cuts carbon without disrupting day-to-day operations.
Commercial sector challenges and hybrid solutions
That said, decarbonisation goes beyond new technology and depends on broader systemic change and well-informed decisions at every level.
Technical complexity and skills gap
Hybrid systems are inherently more complex than single-source systems. They require sophisticated controls, robust commissioning, and knowledgeable operators. Unfortunately, the commercial heating sector faces a significant skills gap. Many engineers have deep experience with boilers, but limited exposure to heat pumps and hybrid logic.
This is where skills development becomes strategic. In order to take full advantage of hybrid technology, training requires emphasis on both the technical installation of hybrid systems and the operational understanding and optimisation required to deliver real performance gains.
System integration and building context
Every commercial property is different, and hybrid system design should account for building fabric, occupancy patterns, existing plant, and future flexibility. Off-the-shelf solutions are rarely sufficient. Instead, integration with data from building management systems (BMS), weather forecasting, and predictive analytics can unlock the true potential of hybrids.
Buildings with poor insulation or large distribution losses may experience reduced returns from heat pumps unless fabric improvements go hand-in-hand with technology upgrades. When the two are viewed holistically, hybrid systems become one element within broader decarbonisation planning.
A long-term role, not a short-term fix
So, are hybrid heating systems transitional technology or a long-term solution? The answer is both.
As a transitional technology, hybrids provide a feasible route to immediate carbon reductions while accommodating existing infrastructure and market realities. They buy valuable time, reduce risk, and help estate managers align with near-term regulatory deadlines.
As a long-term solution, hybrids will be relevant for years to come in many commercial contexts. Particularly in mixed-use facilities, sites with diverse load profiles, or buildings where full electrification is financially impractical today, hybrid systems can offer sustainable efficiency and resilience.
The future of commercial heating won’t follow a single template. It will be shaped by a mix of technologies that are smart, flexible, and able to adapt to different buildings and needs. Hybrid systems capture this approach by connecting existing infrastructure with the low-carbon solutions that are coming next.
As part of the wider decarbonisation effort, hybrid heating plays a practical and strategic role. Its benefits go beyond cutting emissions, helping organisations stay flexible, manage costs, and build the skills needed across the industry.
To realise their full potential, we must invest in people as much as technology, empowering engineers, designers, and estate managers with the knowledge to design, operate, and optimise hybrids effectively.
Decarbonisation is a marathon, not a sprint. Hybrid heating systems give us both a sensible pace and a sustainable path forward, so let’s make them count.
This article appeared in the March 2026 issue of Energy Manager magazine. Subscribe here.
