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Baxi 625 Heat Only Boiler

From £1,170.00

The Baxi 625 Heat Only boiler comes with 7 year parts and labour warranty*

Has no need for a pump overrun or permanent live and has a lift weight from just 17.4kg.

This powerful boiler can be installed on open vent or sealed systems and has an optional in-case rear flue, making it the perfect choice for homes with a high demand for hot water.

The Baxi 625 heat only boiler from Baxi’s 600 series. Compact and easy to install, this wall-mounted heat only boiler (also called regular, open vent or conventional) with its small dimensions is ideal for installation in a standard kitchen cupboard. With outputs from 13kW to 30kW, there’s a model to suit most properties and pockets. Versatile fluing for ease of installation.

  • No pump over-run or permanent live switch required
  • Quick and easy to install
  • Compact cupboard fit
  • Lightweight
  • Suitable for open vent and sealed system</li></ul>
SKU: N/A Categories: , , , Product ID: 1134


The Baxi 625 Heat Only Boiler meets modern home heating needs efficiently and effectively. With its compact and sleek design, it fits seamlessly into any space, offering versatility in installation.

Advanced technology ensures efficient, reliable heating while minimizing energy consumption and reducing bills. Its user-friendly controls make operation simple and intuitive, catering to users of all levels of technical expertise.

It boasts durability and reliability, constructed from high-quality materials engineered for long-lasting performance. It delivers consistent heating performance year after year, providing peace of mind for homeowners. Whether you’re upgrading your existing heating system or installing a new one, the Baxi 625 Heat Only Boiler is a dependable choice that ticks all the boxes. Its compact size and sleek design make it suitable for a variety of household setups, while its advanced technology ensures efficient heating and reduced energy consumption. The boiler’s user-friendly controls allow for easy adjustment of temperature and settings, providing personalized comfort for every user. With its durable construction and reliable performance, this boiler meets the demands of modern living effectively. It is backed by Baxi’s reputation for quality and reliability, providing homeowners with confidence and peace of mind.

The heating system is an environmentally friendly choice, with features designed to minimize its environmental impact. It is compatible with renewable energy sources, allowing homeowners to further reduce their carbon footprint. Overall, the Baxi 625 Heat Only Boiler offers a powerful combination of performance, efficiency, and reliability, making it the ideal choice for any home heating system.

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Additional information

Weight 17.5 kg
Dimensions 37 × 62.5 cm

16kw, 19kw, 25kw, 30kw

Flue Options

Baxi Multifit Horizontal Flue 60/100 (7222019), Baxi Multifit Vertical Flue 60/100 (5118576), Boiler Only – NO Flue


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yle=”font-weight: 500;”>Baxi 600 Heat<strong style=”font-weight: 500;”> 13 Heat16 Heat  19 Heat25 Heat 30 HeatSales Code

Boiler only




Controls and accessories

Operating mode selector switch with reset Yes / noYesYesYesYes<td>Yes</td>



adjustable CH temperatureRange – e.g. 45° to 82°YesYes

LED temp/status/fault diagnosis displayYes / noYesYesYesYesYesBaxi twin channel wired programmer</td>7212443OptionalOptionalOptionalOptionalOptionalBaxi room thermostat720971601OptionalOptionalOptionalOptionalOptionalGasBoiler Plus ErP93. 2009 annual efficiency (PCDB/SEDBUK)%<strong style=”font-weight: 500;”>ErP Product InformationNOxmg/kWh1820212424Sound Power Level, Indoors</td>LWA dB</td>37</td>39414549Space Heating Efficiency Class</td><td> &lt;/td><td>A</td>AAAHeat Input CHkW max gross (QnHs)14.8818.3221.7528.6234.35kW min gross (QnHs)</td><td>8.598.598.59Heat Output CH (non condensing) kW (Pn)</td>1192530 kW (Pn) supply connection(mm)2222222222Inlet supply pressure (natural gas)mbar2020202020Maximum gas ratem3/hr1.421.752.072.733.27Mechanical and hydraulic Compartment ventilation requiredYes / noNoNoNoNoNoFlow / return pipe size(mm)2222222222Condensate discharge pipe size(mm)21.521.521.521.521.5Electrical Electrical supplyVolts / Hz230V/50Hz230V/50Hz230V/50Hz230V/50Hz230V/50HzPermanent live requiredYes / noNoNoNoNoNoSwitched liveYes / noYesYesYesYesYesElectrical power cable fitted as standard1m of 3 coreYesYesYesYesYesPower consumptionWatts1720233344External fuse ratingAmps33333Internal fuse rating
1.6T1.6T1.6T1.6T1.6TBoiler IP rating (electrical protection)Approval categoryIPX4DIPX4DIPX4DIPX4DIPX4DPump overrunYes / noNoNoNoNoNoConcentric flue systemStandard telescopic concentric flueLength in mm315-500315-500315-500315-500315-500Horizontal and Vertical concentric (60/100 mm)Max equivalent length (m)66666Reduction per 135° bend (m) per 93° bend (m)11111Horizontal and Vertical concentric (80/125mm)Max equivalent length (m)1212121212WeightsInstaller lift weight (boiler)Max (kg)17.417.417.417.419.5Gross packaged boiler weight(kg)19.519.519.519.521.5

Product Data

BAXI 600 Heat Only Energy Label UK

64;”>lass=”yoast-text-mark” style=”font-weight: inherit; font-style: inherit; color: var(–theme-color-text_link);”>ref=”″>BAXI 600 Heat Only Installation Manual