Frequently asked questions

Find out more about the RE2020 standard and ceiling fans.

We have set up a dedicated FAQ section for professionals; all the answers are available in the pro area. Just enter your details and you’ll be connected straight away.

RE2020 regulatory thermal calculation

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How is the improvement in perceived temperature linked to ceiling fans taken into account in the RE2020?
Where can I find the calculation method for the RE2020?
In RE2020, what is the maximum surface area taken into account for each ceiling fan?
In RE2020, what is the maximum ceiling height allowed?
How is air speed measured in RE2020?


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What is the carbon footprint of ceiling fans?

Summer comfort

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Is the contribution of ceiling fans in summer over-ventilation taken into account in the RE2020?
What is the Givoni diagram, and how does it apply to RE2020?

Winter comfort

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Is winter comfort addressed in the RE2020?

Energy consumption

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How much energy can be saved by using fans in RE2020?
Why is the electricity consumption of air mixers important in RE2020?


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How do you correctly size and lay out air fans in RE2020?

Degree-hours (DH)

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Degrees of hours in RE2020: how difficult is it to achieve the target?

RE2020 ceiling fan data sheet

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How do I enter air flow values in RE2020 software?

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