Do Navien boilers have a built-in frost protection?
October 24th 2023
Navien boilers incorporate a built-in frost thermostat which automatically turns on the boiler and pump if the water in the boiler falls below 10°C, providing the electrical supply is on. The boiler will operate until the water temperature in the system reaches approximately 10°C measured on the flow sensor in the boiler.
Any other pipework outside of the boiler should be protected from the risk of freezing and protected with suitable insulation. Additional protection from external frost thermostats and pipe thermostats should also be considered.
For systems requiring freeze protection, use only inhibited propylene glycol, specially formulated for hydronic heating systems; use of other types of antifreeze may be harmful to the system and will void the warranty.
More news articles...
![Smart meter guide](https://navien.co.uk/wp-content/uploads/2024/08/11305.005-Smart-Meter-Banner-v3-MF.webp)
Aug 28th 2024
Advice
What is a Smart Meter?
Smart meters are devices that measure how much gas and electricity you’re using, with the readings automatically sent to your
![expansion vessel banner](https://navien.co.uk/wp-content/uploads/2024/08/11229.005-Expansion-Vessel-Banner.webp)
Aug 6th 2024
Advice
Expansion Vessel Maintenance Guide
Expansion vessels, sometimes called expansion tanks, are found in most domestic pressurised heating systems, such as combi boilers. They are
![InstallerSHOW Navien branding](https://navien.co.uk/wp-content/uploads/2023/07/InstallerShow2023_230628_0910_Resized_v2-1667x417-1.jpg)
Jun 20th 2024
Exhibition
Navien UK at InstallerSHOW 2024
Navien UK is excited to attend InstallerSHOW 2024 at the NEC in Birmingham! As part of our commitment to delivering