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Navien NCB 300 Annual Boiler Service (2nd-Year Check) | Leeds Heating Engineer
Annual boiler service on a Navien NCB 300 in Leeds. This is a standard second-year service: filter cleaned, condensate trap cleared, flue gas test completed, flue flow test done, gas pressure checked, radiators bled, inhibitor tested, and all safety devices confirmed working. The boiler is still in mint condition after two years — running ...
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