What heat does the heat protection system protect up to? 23 September 2019 07:53 Updated It protects up to 220ºC, however we do not recommend styling hair over 185ºC. Related articles Which ghd hair products contain heat protection? Are ghd hair products tested on animals? How do I claim on my warranty? There is a hole in my paddle brush, what is this for? Which hairdryer can I use the air diffuser with?