Heat Only Boilers

Baxi 600 Heat

The Baxi 600 Heat has no need for a pump overrun or permanent live to save time during installation.

This range 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.

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Features and Benefits
Product Literature
Dimensions
Technical Specification

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We’re giving you double points on qualifying products from 6th Jan – 2nd March 2026. Work done. Points doubled – simple.

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Features and Benefits

Multiple outputs

Available in outputs of 16, 19 and 25kW

Lightweight

Only 17.4kg installer lift weight (30kW is 19.5kg) allowing for easy installation

Time-saving

No pump overrun or permanent live required, saving time and money during installation, and less disruption for the householder

Flexible

Suitable for fully pumped open vent or sealed systems for installation flexibility

Secure

Easy-fit wall mounting bracket featuring a positive fix and audible lock, so you know it’s secure

Quick servicing

Front and side access allowing a quick and easy servicing with no special tools required

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Product Literature

Installation & Service Manuals

User Guides

Specification Guides

Data Sheets

Product Fiche

Energy Labels

CAD

Solutions Brochure

Dimensions

A: Boiler Width = 370mm

B: Boiler Height = 625mm

C: Boiler Depth = 270mm

D: Side Clearance = 5mm

E: Upper Clearance = 190mm*, 35mm* if using rear flue

F: Lower Clearance = 120mm*, 35mm in 300mm deep wall cupboard

G: Front Clearance= 5mm* in operation (500mm for servicing)

Technical Specification

Product Model	16 Heat	19 Heat	25 Heat
Product Code	7711999	7712020	7712022
Controls and accessories
Operating mode selector switch with reset (Yes/No)	Yes	Yes	Yes
User adjustable CH temperature (Range - e.g. 45° to 82°)	Yes	Yes	Yes
LED temp/status/fault diagnosis display (Yes/No)	Yes	Yes	Yes
Baxi twin channel wired programmer - 7212443	Optional	Optional	Optional
Baxi room thermostat - 720971601	Optional	Optional	Optional
Gas
Boiler Plus ErP (%)	93	93	93
SAP 2009 annual efficiency (PCDB/SEDBUK) %	89.2	89.2	89.1
NOx class	6	6	6
ErP Product Information
NOx (mg/kWh)	20	21	24
Sound Power Level, Indoors (LWA dB)	39	41	45
Space Heating Efficiency Class	A	A	A
Heat Input CH - kW max gross (QnHs)	18.32	21.75	28.62
Heat Input CH - kW min gross (QnHs)	8.59	8.59	8.59
Heat Output CH (non condensing) - kW (Pn)	16	19	25
Heat Output CH (non condensing) - kW (Pn)	7.5	7.5	7.5
Gas supply connection (mm)	22	22	22
Inlet supply pressure (natural gas) - mbar	20	20	20
Maximum gas rate (m3/hr)	1.75	2.07	2.73
Mechanical and hydraulic
Compartment ventilation required (Yes/No)	No	No	No
Flow / return pipe size (mm)	22	22	22
Condensate discharge pipe size (mm)	21.5	21.5	21.5
Electrical
Electrical supply - Volts/Hz	230V/50Hz	230V/50Hz	230V/50Hz
Permanent live required (Yes/No)	No	No	No
Switched live (Yes/No)	Yes	Yes	Yes
Electrical power cable fitted as standard (1m of 3 core)	Yes	Yes	Yes
Power consumption (Watts)	20	23	33
External fuse rating (Amps)	3	3	3
Internal fuse rating	1.6T	1.6T	1.6T
Boiler IP rating (electrical protection) - Approval category	IPX4D	IPX4D	IPX4D
Pump overrun (Yes/No)	No	No	No
Concentric flue system
Standard telescopic concentric flue (Length in mm)	315-500	315-500	315-500
Horizontal and Vertical concentric (60/100 mm) - Max equivalent length (m)	6	6	6
Horizontal and Vertical concentric (60/100 mm) - Reduction per 135° bend (m)	0.5	0.5	0.5
Horizontal and Vertical concentric (60/100 mm) - Reduction per 93° bend (m)	1	1	1
Weights
Installer lift weight (boiler) - Max (kg)	17.4	17.4	17.4
Gross packaged boiler weight (kg)	19.5	19.5	19.5

Contact your ASM

If you are a merchant or installer, your local Baxi representative is here to help.

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More Information

Baxi Genuine Parts

Whether you are working on an installation, repair or service, Baxi Genuine Parts are guaranteed for quality, reliability and safety. Start here to find the parts you need.

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Product Training

Our training courses are held in our state-of-the-art training centres, several with CIPHE approval, by experienced, qualified engineers who know what the job is like.

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Error Codes for Baxi Boilers

If a boiler develops a problem, it will display an error code. We explain the most common error codes here.

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Baxi Works

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