Baxi 400 Combi
Extremely quiet, compact and lightweight, the Baxi 400 Combi can be installed virtually anywhere in your home.
- Features
- Dimensions
- 5 year parts and labour warranty*
- Fits inside a standard kitchen cupboard
- Highly efficient - could save money on fuel bills
- Certified to work with 20% hydrogen'
*Terms and Conditions apply.
- Boiler width = 395mm
- Boiler height = 700mm
- Boiler depth = 279mm
- Side clearance = 5mm
- Upper clearance = 178mm
- Lower clearance = 200mm
- Front clearance = 6mm in operation, 450mm for servicing
Installer Information
Technical Features
- 24 and 28kW
- Optional stand-off frame
- Simple hanging bracket
- Choice of flue lengths
- Compatible with uSense smart control
- Combine this product with a uSense to be Boiler Plus compliant - Find out more
Dimensions
- Boiler width = 395mm
- Boiler height = 700mm
- Boiler depth = 279mm
- Side clearance = 5mm
- Upper clearance = 178mm
- Lower clearance = 200mm
- Front clearance = 6mm in operation, 450mm for servicing
Technical Data Table
| Baxi 400 Combi | 424 Combi | 428 Combi | |
| Sales Code |
Boiler only |
7656162 |
7656163 |
|
Controls |
|||
| Concealed User Controls | No | No | |
| Operating mode selector switch with reset | Yes | Yes | |
| User adjustable DHW temperature | Range - 35° to 60° (±5ºC) | Yes | Yes |
| User adjustable CH temperature | Range - 25° to 80° (±5ºC) | Yes | Yes |
| Temp/status/fault diagnosis display | LCD display | LCD display | |
| Integral 24 hour mechanical timer combi | Optional | Optional | |
| Plug-In 24 hour mechanical timer combi | Optional | Optional | |
| Plug-In receiver 7 day RF thermostat-combi | Optional | Optional | |
| Single channel 7 day wired programmable thermostat-combi | Optional | Optional | |
| Single channel wired timer | Optional | Optional | |
| Room thermostat | Optional | Optional | |
| Wired outdoor weather sensor | Optional | Optional | |
| Baxi 200 and 400 stand off kit (7659335) | Optional | Optional | |
| Multifit filling loop (2498221) | Optional | Optional | |
| SAP 2009 Annual Efficiency (PCDB/SEDBUK) | % | 89 | 89 |
| NOx class | 5 | 5 | |
| ErP Product Information | |||
| NOx | mg/kWh | 38 | 40 |
| Sound Power Level, Indoors | LWA dB | 48 | 50 |
| Space Heating Efficiency Class | A | A | |
| Water Heating Declared Load Profile | XL | XL | |
| Water Heating Efficiency Class | A | A | |
| Heat Input CH | kW max gross (QnHs) | 22.87 | 27.42 |
| kW min gross (QnHs) | 5.44 | 5.44 | |
| Heat Output CH (non condensing) | kW (Pn) | 20 | 20 |
| kW (Pn) | 4.8 | 4.8 | |
| Heat Output CH (condensing) | kW max (PnC) | 21.8 | 21.8 |
| kW min (PnC) | 5.2 | 5.2 | |
| Gas | |||
| Gas supply pipe size | (mm) | 22 | 22 |
| Inlet supply pressure (natural gas) | mbar (nominal) | 20 | 20 |
| Maximum gas rate (natural gas after 10 mins) | m3/hr | 2.61 | 3.06 |
| Mechanical and hydraulic | |||
| Heat input domestic hot water (DHW) | kW max gross (QnwHs) | 27.4 | 32.1 |
| Heat output domestic hot water | kW max | 24 | 28 |
| Maximum DHW flow rate (Delta T @ 35ºC max) | l/min | 9.8 | 11.5 |
| Minimum DHW flow rate required | l/min | 2 | 2 |
| Minimum operating DHW pressure required | bar | 0.15 | 0.15 |
| Maximum DHW system pressure | bar | 8 | 8 |
| Safety discharge pressure | bar | 3 | 3 |
| Compartment ventilation required | No | No | |
| Flow / return pipe size | (mm) | 22 | 22 |
| Integral expansion vessel | Size (litres) | 7 | 7 |
| CH system inhibitor required | Yes | Yes | |
| Condensate discharge pipe size | (mm) | 21.5 | 21.5 |
| Electrical | |||
| Electrical supply | Volts/Hz | 230V/50Hz | 230V/50Hz |
| Permanent live required | Yes | Yes | |
| Electrical power cable required | core | 3 x 0.75 | 3 x 0.75 |
| Power consumption when firing | Watts | 84 | 94 |
| External fuse rating | Amps | 3 | 3 |
| Internal fuse rating - Connection board | Amps | 0.5 | 0.5 |
| Internal fuse rating - Man PCB board | Amps | 1.6 | 1.6 |
| Boiler IP rating (electrical protection) without integral timer fitted | Approval category | IPX5D | IPX5D |
| Circulating pump exercise feature | Yes | Yes | |
| Pump overrun | Yes | Yes | |
| Integral 'boiler only' frost thermostat | Yes | Yes | |
| Concentric flue system | |||
| Standard telescopic concentric flue | Length in mm | 315-500 | 315-500 |
| Horizontal concentric (60/100 mm) | Max equivalent length (m) | 10 | 10 |
| Reduction per 135° bend (m) | 0.5 | 0.5 | |
| Reduction per 93° bend (m) | 1 | 1 | |
| Horizontal concentric (80/125mm) | Max equivalent length | 20 | 20 |
| Weights | |||
| Installer lift weight (boiler) | Max (kg) | 26 | 26 |
| Gross packaged boiler weight | (kg) | 30 | 30 |
Technical Literature
Product Training
We offer product training at our training centres across the UK for installers who want to get hands-on with Baxi boilers.
From construction and installation to functions and features, our expert trainers will give you a complete understanding of working with Baxi boilers.
