Redefining energy performance assessment for warmer, greener homes.

Our measurement technologies deliver a precise view of the energy efficiency and comfort of homes. These insights help you make homes warmer, more affordable, and meet the highest standards for energy efficiency and sustainability.

We’re addressing one of the biggest challenges in climate action: inefficient and underperforming homes.

We're addressing one of the biggest challenges in climate action: inefficient and underperforming homes. Our technologies deliver a precise view of the energy efficiency and comfort of homes with actionable insights to help you make homes warmer, more affordable, and meet the highest standards for energy efficiency and sustainability.

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The Scale Of The Problem

Millions of homes are underperforming; wasting energy, increasing costs, driving up carbon emissions, and leaving vulnerable people struggling to stay warm. Retrofitting based on models and approximations without knowing a home's true energy performance means unverifiable improvements, unhappy tenants and limiting access to funding. Solving this problem has been hampered by an inability to accurately measure the true energy performance of homes and the impact of thermal renovations.
No accuracy, no impact.

No accuracy, no impact.

As of 2022, nearly 48% of dwellings in England were rated A to C on the Energy Performance Certificate (EPC) scale, indicating good energy efficiency. However, approximately 52% fall below this standard, with 9% rated in the lowest bands E to G.
Source: English Housing Survey 2022 to 2023: energy report

Finally, precision energy performance assessment is here

KES believes every home should contribute to a low carbon future.
We’re on a mission to help make homes warmer and greener. Our pioneering technologies and solutions set a new standard for home energy performance assessment, putting data-driven insights at the heart of real impact, enabling energy optimisation and demand flexibility services.
Performance
500K
Days of building performance data over 8 heating seasons.
Precision
Up to
97%
Space heating accuracy - a new standard in the sector.
Impact
Warmer. Greener. Affordable.
How it works

Digitalise today, transform tomorrow.

Join the shift to in-use energy performance assessment and start reaping the rewards today.
We are a market leader in assessing a home’s energy performance, with a space heating accuracy level of up to 97%. This delivers rich, actionable insights which support your retrofit planning and decision-making, helping you deliver measurable impact where it matters most.
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Better quality and cost-effective retrofits
Promotes high quality installation standards of retrofits and ongoing performance monitoring.
Smarter decision making with measured data points, not guesses
Up to 97% accuracy means reliable, actionable insights and real impact.
Reach sustainability targets and enhance funding
Prove your carbon emission reductions to access smart carbon financing and emerging pay-for-performance schemes.
Enhance tenant satisfaction
Lower bills, warmer homes - tangible impact that improves lives.
Flexible, scalable assessment for every home
Our technology works with diverse housing types, heating systems, and meters, ensuring scalability and inclusivity.
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Brugse Maatschappij voor huisvesting

“Previously we tried a variety of methods to insulate the walls of our older stock. But it’s challenging to find a practical approach that reduces future maintenance risks at an affordable capital cost. Knauf Energy Solutions are using real world high performance data to enable us to achieve this objective.”

Luc de Smedt, Director
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BRUGSE MAATSCHAPPIJ VOOR HUISVESTING

“Previously we tried a variety of methods to insulate the walls of our older stock. But it’s challenging to find a practical approach that reduces future maintenance risks at an affordable capital cost. Knauf Energy Solutions are using real world high performance data to enable us to achieve this objective.”

Luc de Smedt, Director
Read more testimonials

We are revolutionising in-use energy performance assessment

We are proud to offer comprehensive and flexible solutions when it comes to home energy efficiency assessment. Our reliable insights are brought to you with a market-leading accuracy level of up to 97%.

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Actionable Insights You Can Trust

Our methodology is the foundation of our success. By integrating cutting-edge AI and machine learning technologies with decades of expertise in building science, we deliver actionable insights to our partners, enabling smarter decision-making for sustainable housing. Our approach doesn’t just measure energy performance—it transforms it, creating meaningful, real-world impact.

*for illustrative purposes

Our measurement technologies deliver a precise view of the energy efficiency and comfort of homes. These insights help you make homes warmer, more affordable, and meet the highest standards for energy efficiency and sustainability.

our technology
contact us

Our Key Initiatives

We’re helping to transform the housing sector. Our focus areas span (but aren't limited to) the following initiatives.
ECO
Energy Company Obligation
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Warm Homes Fund
Social Housing Fund Wave 3
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EPC
Energy Performance Certifcate
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Carbon credits
Retrofit Based Credits
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Join Us on the Journey.

Let’s make homes more sustainable together.

Transforming housing starts here. Whether you’re a housing provider, landlord, or partner,  you play a vital role in building a sustainable, energy-efficient world. KES offers smart, scalable, impactful solutions to guide you every step of the way.

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Frequently Asked Questions

How does KES support schemes like Warm Homes: Social Housing Fund Wave 3 or ECO4?

Our solutions are designed to meet the data requirements of these schemes. We provide accurate energy performance measurements that ensure digitalisation and compliance, maximising funding eligibility, and delivering verified results for housing associations and landlords.

How accurate are the insights that KES delivers?

Our technology is able to measure and predict a home’s energy performance to an accuracy level of up to 97%, ensuring reliable, actionable insights that help deliver real world impact. The next best accuracy level at the time of writing is 85%, which is equivalent to an estimation with too much room for assumption and therefore limited impact.

What is KES?

KES is a pioneering home energy performance assessment company that delivers reliable and actionable insights to optimise retrofits, improve energy efficiency, and unlock funding opportunities like the Warm Homes: Social Housing Fund Wave 3 and ECO4 schemes.

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