Design services

We want to enable you to achieve the best you can in the context of your objectives and resources. We offer our consultancy services to self-builders and their architects.

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Services

Windows

Discover our range of triple glazed windows, suitable for low energy and Passivhaus homes. We make home a healthier and more comfortable place to be.

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Doors

Discover our range of inward and outward opening entrance, french, lift and slide doors and Lacuna® bi-fold doors, suitable for low energy and Passivhaus homes.

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Range

Solar panels

Harness the power of the sun with our high-efficiency solar panels. Save on energy costs, reduce your carbon footprint, and enjoy reliable, sustainable energy for your home or business.

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Range

Heat pumps

These cutting-edge heating and cooling systems harness the stable ground temperature or take air from outside to deliver remarkably energy-efficient solutions for residential, commercial and industrial properties.

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Range

MVHR

We're nationally recognised for our expertise in designing, supplying and commissioning MVHR systems for Passivhaus and low energy projects.

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Units

About us

We've been supplying pioneering sustainable building products since 1995. Get to know us a little better and our range of specialist products and services.

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Discover

We want to enable you to achieve the best you can in the context of your objectives and resources. We offer our consultancy services to self-builders and their architects.

Discover all services

Services

Discover our range of triple glazed windows, suitable for low energy and Passivhaus homes. We make home a healthier and more comfortable place to be.

Discover our windows

Options

Range

Discover our range of inward and outward opening entrance, french, lift and slide doors and Lacuna® bi-fold doors, suitable for low energy and Passivhaus homes.

Discover our doors

Options

Range

Harness the power of the sun with our high-efficiency solar panels. Save on energy costs, reduce your carbon footprint, and enjoy reliable, sustainable energy for your home or business.

Discover our solar panels

Range

Discover our heat pumps

Range

We're nationally recognised for our expertise in designing, supplying and commissioning MVHR systems for Passivhaus and low energy projects.

Discover MVHR

Options

Units

We've been supplying pioneering sustainable building products since 1995. Get to know us a little better and our range of specialist products and services.

Find out more

Discover

Technical Resource | 11 Mar 2024

Zehnder Technical Information

Download everything from the Zehnder brochure, datasheets, Passivhaus certificates and installer manuals.

MVHR Brochure

Download PDF

Zehnder ComfoAir Q Datasheet

Download PDF

ComfoAir Q 350 PH certificate

Download PDF

ComfoAir Q 450 PH certificate

Download PDF

Are you an architect?

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technical resource

Entrance Doors Technical Information

technical resource

Lacuna Bi-fold Doors

technical resource

MVHR Brochure

Life changing homes

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T: 01484 461705 E: info@21degrees.com

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21° is a trading name of Environmental Construction Products Ltd. Registered Office: 85 Great Portland Street, London, W1W 7LT. We are an Efficient Building Solutions business. VAT registration number: 640 7097 42. Company registration: Cardiff 3359943

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