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? How do I claim on my warranty? Are ghd hair products tested on animals? There is a hole in my paddle brush, what is this for? Which hairdryer can I use the air diffuser with?