You may already be aware that Alde Heating is a hydronic systems. This means that a heating fluid is heated up in the boiler and then circulated through pipework, which provides heat via emitters like convectors, towel radiators, etc.
The heating fluid contains an antifreeze that also protects against corrosion and bacterial growth, but these qualities deplete over time. Alde Premium G13 Antifreeze is magenta in colour and should be replaced every 5 years. If your fluid is a different colour, change it after 2 years.
By maintaining your heating fluid, you know that your system contains the right mix of antifreeze and water. That the risk of frost and corrosion damage and bacterial growth has been minimised. Equip your Alde Heating system with the best conditions for stable and pleasant heating.