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Navien NCN-25K LPG - Boiler Efficiency Ratings

Boiler Efficiency Rating

You can check your boilers rating by selecting it's make and model below. Ratings are based on the SEDBUK Rating which is an indicator of its efficiency when used within an average domestic household, it's a great benchmark for comparing new boilers and also assessing whether your current boiler would be better off being replaced due to low efficiencies.

For new boiler installations call British Gas Boilers on 0800 327 7119 for a no-obligation quote, alternatively visit Boiler Guide to request quotes from independent local and regional heating engineers.

Navien NCN-25K Efficiency

SAP seasonal efficiency92.0%
Rating bandBand A


ManufacturerNavien Boilers
Fuel TypeLPG
Flue TypeOpen or Room-Sealed
FanFan Assisted
Output (kW)23.1 - 23.1
Boiler ID
Manufactured From/To2010 - current


The Navien NCN-25K is an 'A' rated boiler which has an excellent efficiency of 92.0%.

The NCN-25K is a Condensing Combi boiler with a maximum power output of 23.1kw that uses LPG as its fuel source.

As this boiler is 'A' rated it will provide efficient heating and subsequently reduce fuel bills and carbon dioxide emissions.

Similar Navien Boilers to the NCN-25K
(Condensing LPG Combi)

Results ordered by efficiency. Some models may be obsolete.

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