Extremely quiet, compact and lightweight, the Baxi 400 Combi can be installed virtually anywhere in your home.
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 |
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.
Our boilers are manufactured in the UK and stocked in plumbing and builders' merchants nationwide.
Our BoilersFind a Baxi installer near you for a free quote to install your new boiler.