What heat does the heat protection system protect up to? 21 June 2019 10:20 It protects up to 220ºC, however we do not recommend styling hair over 185ºC. Related articles Which ghd hair styling products contain heat protection? Are ghd hair products tested on animals? How do I claim on my warranty? How do I clean my ghd glide? How do I look after the cord on my ghd product?