Hydronic Radiant Heating Maintenance

Most maintenance items center on the pumps and boilers. For the most part, the pumps used today are maintenance free. They use water to lubricate the bearings, which allows for a quieter, more efficient life span. In general, these pumps have an estimated life span of 10 years. Most boiler installers will offer a yearly maintenance package, which includes cleaning and general up-keep. Different boiler types will require different maintenance.

Glycol systems should be checked at least once a year to ensure the system pH levels have not dropped below recommended levels. Glycol in general is acidic. The inhibitors that are added to them help neutralize the system pH, and help protect the system components. As the system ages, the inhibitors break down, causing the system pH to drop. At this point more inhibitors should be added to the radiant floor heating and snow melt systems. The system will reach a point where it will require a complete flush and re-fill. This is usually around 5-7 years.

Both Boilers and water heaters require routine maintenance. Check the manufacturer’s recommendations for frequency. Also, it is important to regularly inspect the water pressure in the circulation loops. Most systems are equipped with a pressure gauge that reads the pressure of the water loop. A loss of pressure indicates a loss of fluid in the loop.


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