Change the way you think about energy

Harness your own sustainable energy to improve efficiency, comfort and the planet.
Get in touch
Birdseye view of a river and road

Our energy, where we source it and how we use it, is evolving.

Our world is changing. We believe now is the time to adapt and so we're pioneering a new future.

Our mission is to empower homeowners, architects, and businesses with the knowledge and technology to harness their own sustainable energy and help safeguard the planet.​ 

Who we help

Homeowners

Your home should do more than provide shelter and be efficient. If designed or updated correctly they can provide a far more healthy and comfortable environment to live in.

Architects and specifiers

Increasingly challenged to meet the demands of both energy efficiency and aesthetic excellence in your designs? We offer full-circle sustainability solutions tailored to your needs.

Businesses and local authorities

Increasingly challenged to lower your operating costs and to meet the environmental expectations of your key stakeholders? We offer bespoke, full-circle solutions tailored to your specific needs.​

Featured in

We believe our built environment should be designed for optimal efficiency, health, and comfort.

Whether you need a single product or the ultimate Passivhaus, your system needs to be well thought out and designed correctly. We adopt a full-circle approach to provide better performing buildings from a carbon, cost, and comfort perspective to get you the right outcome

Our specialist products and services include renewables such as solar panels and heat pumps, and energy efficient upgrades such as triple-glazed windows and doors, mechanical ventilation with heat recovery (MVHR) systems, and insulation and airtightness products. 

Design services

Have a big project? our design services help you know where to start.

The benefits of being energy efficient

Money icon

Ultra low energy

With ultra low energy you'll find a near-zero heating requirement, long term cost savings, and reduced greenhouse gas emissions.

Windmill icon

Health

The benefits to your health include: no mould, cleaner filtered air, reduced pollutants, and optimal humidity at all times.

Thermostat icon

Comfort

Factoring comfort into building design results in year round ambient temperature, no draughts, and being able to breathe easy.

How can we help?

Visit the showrooms

Visit us at our showrooms in Huddersfield and Swindon or catch us at exhibitions around the UK.

Request a quote

Tell us about a project, and we'll make sure you get a no-obligation quote from us.

Get in touch

Our friendly and responsive customer service team will help with your enquiry.

Diagram of a house, outside of a house, close-up of window

21 Degrees is far and away ahead of everyone else in terms of knowledge and expertise in designing and supplying MVHR systems for low energy and Passivhaus projects.

Mark Siddall, LEAP - Low Energy Architectural Practice

Join the energy efficiency revolution

From energy-efficient upgrades to renewable energy technology, it all starts with finding out your exact requirements.

Request a quote
Change the way you think about energy