Achieving Net Zero: The role of heat pumps in Passivhaus projects

We’re in a climate emergency, and with buildings responsible for 35% of global energy use, the push to decarbonise our homes is critical. As Net Zero targets approach, integrating low-carbon heating solutions like heat pumps into Passivhaus designs has never been more essential. Don’t miss our new guide , designed to help designers make informed choices about heat pump design and specification for maximized energy performance.

Endorsed by CIBSE, this short guidance note 'Air-to-water heat pumps: The basics of energy efficiency' is tailored for designers at the early project stages and covers both simple and advanced aspects of heat pump integration. It highlights both straightforward and complex aspects of system design, ensuring that even experienced service engineers can benefit from its insights. Most of the guidance can apply to any building project, regardless of energy standards, making it a valuable resource across the industry.

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Why heat pumps matter in Passivhaus design

Air source heat pumps (ASHPs) provide an innovative solution for maintaining indoor comfort while minimizing energy use. Using electricity, which can be sourced from renewables, these systems capture and convert ambient air into usable heat for water and space heating. When integrated into energy-efficient Passivhaus projects, ASHPs offer a sustainable, low-carbon alternative to fossil fuel-based heating, making them an ideal choice for reducing carbon emissions.

Guide highlights

This short guidance note delves into several essential considerations for integrating air-to-water heat pumps effectively. Here are some of the key areas addressed:

• Flow temperatures & distribution losses: Setting the right flow temperature and minimizing heat loss in the distribution network is essential for optimal heat pump efficiency.
• System design & sizing: Sizing the pump properly is essential for optimal performance in a Passivhaus building. Oversizing can lead to inefficiencies, while under-sizing may compromise comfort.
• System controls: Intelligent system controls play a vital role in maintaining consistent performance and adjusting to user needs.
• Monitoring & maintenance: Routine maintenance and monitoring are crucial for long-term efficiency.
• Input into PHPP: Make sure the correct temperatures for the various elements of the system are entered into the Passive House Planning Package (PHPP).

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Bringing the technical guide to Life

Join our upcoming webinar, where Passivhaus experts; Sarah Lewis , Sally Godber , Gwilym Still and Alan Clarke will discuss key findings and tips for making impactful energy performance decisions regarding ASHPs. A must-attend session for anyone looking to deepen their understanding of heat pump technology in Passivhaus. Get ahead in your next project!

Final thoughts: A resource for all energy-efficient projects

ASHPs are an ideal low-carbon solution for energy efficient buildings. With the right knowledge and tools, like those provided in this short guidance note, construction professionals can make informed decisions that lead to healthier, greener buildings.

We invite you to download the guide , register for the webinar, and join the conversation.

Image Credits:

Banner - Hope View House ? Lisa Lodwig