Exploring the Potential of Hydrogen Gas for Homes with Limited Space for Air Source Heat Pumps

In the pursuit of sustainable and eco-friendly energy solutions, homeowners face the challenge of choosing the most efficient and practical systems for heating. Among the popular options are air source heat pumps (ASHPs), which draw heat from the air to provide heating and hot water. However, ASHPs require a certain amount of outdoor space for installation, which is not feasible for all homes. For those with limited space, hydrogen gas presents an intriguing alternative. But would some homes truly benefit from hydrogen gas when there is no space for an air source heat pump? Let’s explore this question.

The Limitations of Air Source Heat Pumps

Air source heat pumps have gained popularity due to their efficiency and low carbon emissions. They are particularly effective in well-insulated homes and can significantly reduce reliance on fossil fuels. However, the installation of ASHPs poses several challenges:

  1. Space Requirements: ASHPs need sufficient outdoor space for the unit, which can be problematic for urban homes, apartments, and houses with small gardens or no outdoor space.
  2. Aesthetic and Noise Concerns: The units can be bulky and noisy, potentially causing disturbances and aesthetic issues, especially in densely populated areas.
  3. Performance in Cold Climates: While modern ASHPs are designed to work in lower temperatures, their efficiency can decrease in extremely cold climates, necessitating backup heating systems.

Hydrogen Gas: An Emerging Alternative

Hydrogen gas is being touted as a clean energy source for the future. When burned, it produces only water vapor, making it an environmentally friendly option. Here’s how hydrogen could benefit homes without space for an ASHP:

  1. Minimal Space Requirement: Hydrogen boilers are similar in size to conventional gas boilers, making them suitable for homes without the space for an ASHP. They can be installed within the home without needing extensive outdoor units.
  2. Infrastructure Compatibility: Existing natural gas infrastructure can often be repurposed for hydrogen, reducing the need for significant changes to home heating systems. This compatibility can make the transition smoother and more cost-effective.
  3. High Efficiency: Hydrogen boilers can achieve high efficiency levels, providing reliable heating without the efficiency losses associated with ASHPs in colder climates.

Potential Challenges

While hydrogen gas offers promising benefits, several challenges need to be addressed:

  1. Production and Supply: Currently, most hydrogen is produced from natural gas in a process that emits carbon dioxide. To be truly green, hydrogen needs to be produced via electrolysis using renewable energy, which is still in the development stage and can be costly.
  2. Safety Concerns: Like natural gas, hydrogen is highly flammable, and its use in residential areas necessitates stringent safety measures. Robust safety standards are essential to mitigate these risks.
  3. Infrastructure Development: Although hydrogen can use existing gas pipelines, significant upgrades and safety modifications are necessary. The development of a widespread hydrogen infrastructure will require substantial investment and time.


For homes without the space for an air source heat pump, hydrogen gas presents a viable and promising alternative. Its ability to integrate with existing infrastructure, minimal space requirements, and potential for high efficiency make it an attractive option. However, the adoption of hydrogen as a mainstream home heating solution depends on overcoming production challenges, ensuring safety, and developing the necessary infrastructure. It also requires the commitment from the Government to consider it a way forward, sadly it’s looking unlikely.

As the world moves towards a more sustainable future, hydrogen gas could play a crucial role in diversifying and securing our energy needs. For homeowners constrained by space, keeping an eye on advancements in hydrogen technology may provide the answer to efficient and eco-friendly heating, but for now, they may have to live with natural gas if an ASHP is just too big!

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