Vokera
The Vokera Easi-Heat Plus 25C is a 25 kW A-rated condensing combi boiler, offering a 10.2 lpm DHW flow rate and 93% seasonal efficiency for UK domestic heating.
The Vokera Easi-Heat Plus 25C is a wall-hung condensing combi boiler designed for domestic heating and hot water provision in UK properties. This appliance supports both natural gas and LPG fuel types, offering flexibility for various installations. Engineered for efficiency and reliability, the Easi-Heat Plus 25C provides essential performance data and operational insights for gas and heating engineers, alongside homeowners seeking technical specifications or troubleshooting information for their heating system.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
R: Heating return connection, F: Heating flow connection, G: Gas connection, O: Hot water outlet, I: Cold water inlet
Water treatment be carried out in accordance with the Benchmark Guidance on water treatment in central heating systems.
The Vokera Easi-Heat Plus 25C is a condensing combi boiler capable of delivering a maximum domestic hot water output of 25 kW, with a flow rate of 10.2 litres per minute at a 35°C temperature rise. For central heating, it provides a maximum output of 19.5 kW, modulating down to 4.91 kW. This appliance achieves a seasonal efficiency of 93% and holds an ErP A-rating for both heating and domestic hot water, with an XL DHW profile. Its compact dimensions of 792mm height, 405mm width, and 253mm depth, coupled with a dry weight of 27 kg, facilitate installation in various internal wall-hung applications. The boiler features a preheat function for DHW and incorporates a high-efficiency pump. It is designed for compatibility with standard controls including time clocks and RF room thermostats, ensuring straightforward integration into existing or new heating systems. NOx emissions are rated Class 6 at 30 mg/kWh.
Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/boilers/vokera/easi-heat-plus-29c-ng#fault-purge cycle mode active to jump straight to the entry.
| Code | Meaning | Details |
|---|---|---|
| Purge cycle mode active | NA Show causes & actionsUser action None | Details |
| Alarm high limit thermostat | Final Show causes & actionsUser action Reset appliance. Engineer action Call engineer if fault re-occurs Reset procedure Reset appliance. | Details |
| Alarm system water pressure | Final Show causes & actionsUser action Check/refill system pressure, reset, check. Engineer action Call engineer if fault re-occurs. Reset procedure reset, check. | Details |
| Alarm safety shutdown and/or fumes exhaust - air intake obstruction | Final internal fault Show causes & actionsUser action Reset appliance. Engineer action Call engineer if fault re-occurs. Reset procedure Reset appliance. | Details |
| Temporary fault | Temporary Show causes & actionsUser action None | Details |
| DHW pre-heat function | NA Show causes & actionsUser action None | Details |
| Service operation | NA Show causes & actionsUser action None | Details |
| Flame ON | NA Show causes & actionsUser action None | Details |
| Fault sensors | Final Show causes & actionsUser action Reset appliance. Engineer action Call engineer if fault re-occurs Reset procedure Reset appliance. | Details |
| Boiler stand-by | NA Show causes & actionsUser action None | Details |
Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.
User: None
Triggered by fault code Purge cycle mode active.
User: Reset appliance.
Engineer: Call engineer if fault re-occurs
Triggered by fault code Alarm high limit thermostat.
User: Reset appliance.
Engineer: Call engineer if fault re-occurs.
Triggered by fault code Alarm safety shutdown and/or fumes exhaust - air intake obstruction.
User: None
Triggered by fault code Temporary fault.
Common questions from engineers and homeowners about the Vokera Easi-Heat Plus 29C (NG).
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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 28 June 2026.