Cold Weather Alert: Protect Your HVAC Coils from Freezing and Bursting

As temperatures drop across the UK, HVAC systems are at risk of serious damage. In areas where temperatures have reached as low as -10°C, frozen water inside HVAC coils can expand, causing cracks, splits, and potentially catastrophic system failures.

When water inside HVAC coils freezes, it expands, creating pressure that can cause the coil to crack or split. This is a common issue during freezing weather but one that can be prevented with the right precautions.

To avoid burst coils and costly repairs, take these steps to protect your system:
1. Ensure your heating system is operational and circulating warm water to prevent freezing
2. Drain unused coils to avoid stagnant water, which is more likely to freeze
3. Check insulation and lagging for vulnerable areas that could allow cold air to reach the coils

Antifreeze or glycol solutions can be used to protect your coils from freezing. However, glycol should be considered as a last resort, as it can have a negative effect on coil performance and fluid pressure drop. Always ensure the correct percentage of antifreeze or glycol is used to maintain system efficiency.

At SPC, we design and manufacture heating and cooling coils built to perform in extreme conditions. Our team offers:
1. On-site surveys to assess coil damage and identify issues before they become critical
2. Custom replacement coils designed to fit your system, ensuring minimal disruption
3. Faster lead times than many other UK manufacturers, helping you get back up and running quickly

The risk of burst coils is real, but with the right precautions, you can prevent damage and avoid costly repairs. If your coils have burst or you’re concerned about your system’s performance this winter, contact SPC for expert advice and solutions.
📞 Call us today at 0116 249 0044
📧 Email us at spc@spc-hvac.co.uk