The Baxi 619 Heat Only Boiler is a 19kW wall-mounted gas condensing conventional boiler from Baxi's installer-favourite 600 series. Backed by a 7-year parts and labour warranty and rated ErP class A for space heating, it suits homes with a separate hot water cylinder and a high demand for central heating — whether on fully-pumped open-vent or sealed systems. Its no pump-overrun, no permanent-live design cuts installation time and reduces disruption for householders.
7-Year
Parts & labour warranty
17.4 kg
Installer lift weight
ErP A
Space heating class
⚠ Installer notice: Must be installed by a Gas Safe registered engineer in accordance with current Gas Safety (Installation & Use) Regulations. Benchmark Commissioning Checklist must be completed and left with the user.
ℹ Open-vent or sealed: The Baxi 619 can be fitted on either system type, giving maximum flexibility for replacement and new-build applications. No permanent live is required — saving wiring time on site.
Key Features
19 kW Output — Right-sized for Mid-sized Homes
Delivering 19kW of central heating output with a minimum of 7.5kW, the 619 modulates across a wide range to maintain comfort without short-cycling. A flexible replacement for mid-range conventional boilers.
93% ErP Efficiency — ErP Class A Rated
The Baxi 619 achieves 93% Boiler Plus ErP efficiency and SEDBUK 89.2%, qualifying as a Class A space heating appliance. High condensing performance reduces gas consumption and running costs.
7-Year Parts & Labour Warranty
Installed and registered by a Gas Safe engineer, the 619 carries a full 7-year parts and labour warranty for homeowner peace of mind and minimal callback risk for the installer.
No Pump Overrun & No Permanent Live
Unlike many rivals, the Baxi 619 requires no pump overrun and no permanent live connection. This simplifies wiring, speeds up installation, and avoids the need to provide a dedicated switched supply.
Compact & Lightweight at 17.4 kg
At just 17.4 kg installer lift weight, the 619 is easy for a single engineer to hang without mechanical assistance. The slim 270mm depth makes it ideal for kitchen cupboard installations.
Easy-Fit Secure Wall Bracket
The positive-fix wall-mounting bracket with audible locking confirmation ensures the boiler is safely secured at first hang. Front and side access panels allow rapid servicing without special tools.
Flexible Flue Options
A telescopic 60/100mm concentric flue (315–500mm). Top or optional in-case rear flue routing gives site flexibility, with a maximum equivalent horizontal run of 6 metres.
OpenTherm Compatible & Hydrogen Blend Ready
The 619 supports Certified OpenTherm controls such as the Baxi uSense 2, enabling weather-compensating operation for maximum seasonal efficiency. Certified for use with an 80/20 natural gas/hydrogen blend.
Technical Specification
| MPN / Product Code |
7712020 |
| Model |
Baxi 619 Heat Only |
| Series |
Baxi 600 Heat |
| Heat output (max) |
19 kW |
| Heat output (min) |
7.5 kW |
| Heat input – max gross (QnHs) |
21.75 kW |
| Heat input – min gross (QnHs) |
8.59 kW |
| ErP space heating efficiency |
93% (Class A) |
| SEDBUK 2009 efficiency |
89.2% |
| NOx class / NOx |
Class 6 / 21 mg/kWh |
| Sound power level (LWA) |
41 dB(A) indoors |
| Gas supply connection |
22mm |
| Inlet supply pressure (natural gas) |
20 mbar |
| Maximum gas rate |
2.07 m³/hr |
| Electrical supply |
230V / 50Hz |
| Power consumption |
23 W |
| Permanent live required |
No |
| Pump overrun required |
No |
| External fuse rating |
3A |
| IP rating |
IPX4D |
| Flue type |
60/100mm concentric |
| Standard flue length |
315–500mm telescopic |
| Max equivalent flue length |
6 m |
| Flow / return pipe size |
22mm |
| Condensate pipe size |
21.5mm |
| Compartment ventilation required |
No |
| Boiler width × height × depth |
370 × 625 × 270 mm |
| Installer lift weight |
17.4 kg |
| Gross packaged weight |
19.5 kg |
| System compatibility |
Fully-pumped open-vent or sealed |
| Warranty |
7-year parts & labour |
Frequently Asked Questions
What size home is the Baxi 619 suitable for?
The 619's 19kW output is well matched to medium-sized homes typically with 10–15 radiators. It works with a separately-stored hot water cylinder, making it ideal for households with higher hot-water demands or more than one bathroom.
Does the Baxi 619 need a permanent live connection?
No. The Baxi 619 is designed to operate with a switched live only — no permanent live or pump-overrun circuit is required. This simplifies installation wiring and makes it straightforward to retrofit into older systems.
Can the Baxi 619 be installed in a cupboard?
Yes. With only 5mm side clearance and a depth of 270mm, the 619 is designed to fit inside a standard kitchen cupboard. The optional in-case rear flue further aids a clean, compact installation. No compartment ventilation is required.
Is the Baxi 619 compatible with smart thermostats?
Yes. The 619 supports Certified OpenTherm controls, including the Baxi uSense 2 smart thermostat, enabling weather-compensating modulation for improved seasonal efficiency and Boiler Plus compliance.
What warranty does the Baxi 619 carry?
The Baxi 619 is covered by a 7-year parts and labour warranty when installed by a Gas Safe registered engineer and registered with Baxi. The Benchmark Commissioning Checklist must be completed at commissioning to validate the warranty.
Is the Baxi 619 hydrogen-ready?
