What heat does the heat protection system protect up to? 23 September 2019 07:50 Updated It protects up to 220ºC, however we do not recommend styling hair over 185ºC. Related articles How do I claim on my warranty? Which ghd hair products contain heat protection? Which hairdryer can I use the ghd professional diffuser with? ghd max and ghd mini styler There is a hole in my paddle brush, what is this for?