Heating System Size Calculator

This App is designed to enable heating engineers and plumbing professionals to calculate quickly and accurately the size of a central heating installation in order to recommend the correct products and dosage levels to protect and extend the life of the boiler and system.



Applying the results of the calculation will ensure that a system is correctly dosed and the benefits of water treatment fully realised. An under-dosed system may remain vulnerable to the effects of corrosion so for continued protection, check Protector levels annually.

All Fernox products are Nitrate, Nitrite, EDTA and Phosphate free.