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Article on the National Fenestration Rating Council (NFRC) It includes: 1- The history of the company such as (when was it established, from its founder,

Article on the National Fenestration Rating Council (NFRC) It includes:

1- The history of the company such as (when was it established, from its founder, etc.) Is it mandatory in the UK?

2- Where is it spread outside the UK??

3- What is the new thing that a company is working on regarding their products regarding COVID-19?

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