The Fernox F1 & F3 Central Heating Protector and Cleaner Set includes two 500ml bottles of product, designed specifically for storage tank water heaters and boilers. Made by the trusted brand Fernox, this set is suitable for hydronic heating systems and features a compact design for easy storage and use. With an energy efficiency rating of A and an EC range of A+++ - E, this product is a reliable choice for maintaining and protecting your central heating system. Perfect for use in whole house systems, this set is a must-have for anyone looking to keep their heating system in top condition.
eBay