The antifreeze in your heating fluid plays a crucial role beyond just frost protection; it effectively prevents corrosion and inhibits bacteria growth. It’s important to note that the corrosion protection starts to decline over time. However, we can expertly determine when your fluid needs to be changed by conducting a simple test on the fluid in your system.

Many Alde owners are still confused by outdated information, details specific to North America (where a different chemical base is used), and misinformation found on Internet forums and YouTube. This confusion is compounded by some antifreeze suppliers promoting their products as suitable for use in caravan and motorhome hydronic heating systems, even though these products are not Alde-approved. There are only four Alde-approved antifreeze products available for use in the UK (Alde Approval 4070 2024), and these are listed below. 👇🏼👇🏼

When in doubt—especially with a pre-owned vehicle—it's crucial to change the fluid at your earliest convenience for optimal performance and longevity.

Here, at MDMCS, we use only Alde-approved antifreeze, which is magenta in colour and protects down to approximately -37 °C. It provides inhibiting protection and typically has a service life of up to five years.