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Baxi 600 Combi LPG Boiler

Perfect for most off-grid properties, the Baxi 600 Combi LPG comes in a range of outputs to suit your home and central heating requirements.

Built here in the United Kingdom, the Baxi 600 Combi LPG works similarly to a traditional gas boiler but does not need a connection to the mains supply, making it a good choice for homes off the grid. It’s lightweight, has compact dimensions and is small enough to fit inside a standard kitchen cupboard, and it does not require a tank in the loft or a hot water storage cylinder. 

How Much Does this Boiler Cost?

Baxi’s 600 Combi LPG is available in 24kW, 30kW and 36kW outputs to match your needs and typically costs between £790 and £1,130, not including the installation cost. If you want to find the best price, we recommend you look around and get a quote from local and national Gas Safe registered installers. We suggest you ask each installer to provide a fixed-price quote to avoid hidden boiler installation costs. 

How will I know if this Boiler is Suitable for My Home?

The Baxi 600 Combi LPG is suitable for small, medium and large-sized homes which are off the gas grid. If you already use liquid petroleum gas (LPG) to heat your home, you’ll know that the fuel must be delivered to your property and stored in a tank. One of the advantages of getting this LPG combi boiler installed is that it can fit inside a kitchen cupboard, so it may appeal to you if your home is short on space. 

If you’re considering purchasing the Baxi 600 Combi LPG, you must select the correct size/output to ensure it heats your home and provides enough hot water. We recommend you consult a Gas Safe registered engineer to help you find an appropriate boiler for your home and needs. 

Is it a High Efficiency Boiler?

It is. The Baxi 600 Combi LPG has an A energy rating and is an Energy Saving Trust endorsed combination boiler. You can maximise efficiency by combing this LPG combi boiler with a Baxi uSense smart room thermostat that complies with Boiler Plus. 

Does this Boiler have a Good Range of Controls and Features?

Yes. Baxi’s 600 Combi LPG has top quality brass components and built-in pipes behind the facility within the boiler casing to keep your system looking tidy. It comes with an OpenTherm interface and is compatible with the Baxi uSense smart room thermostat that lets you control your heating through an app on your smartphone or tablet. This LPG combi boiler also has a simple hanging bracket, a choice of flue lengths and an Easy-Fill permanent filling link to enable you to top up your system.  

How long is the Warranty on this Boiler?

The Baxi 600 Combi LPG comes with a 7-year parts and labour warranty as standard to provide extra peace of mind that you’re covered if the boiler breaks down. 

Summary of Important Information

  • Expect to pay between £790 and £1,130
  • Heating output of 24kW, 30kW or 36kW
  • Hot water flow rate of 10.2, 12.2 or 15 litres per minute
  • Dimensions of 700mm (H) x 390mm (W) x 285mm (D)
  • Uses LPG as its fuel source
  • A-rated for efficiency
  • 7-year warranty as standard

Pros and Cons

We believe the Baxi 600 Combi LPG is an affordable combination boiler for off-gas grid homes on a tight budget and those that want an energy-efficient heating system. Below, you can find a list of the pros and cons to help you reach an informed decision about this LPG combi boiler from Baxi.


  • Baxi has a Which? brand score of 76% – correct at the time of writing – January 2022
  • Considerably cheaper than some other boiler brands
  • Fits inside a kitchen cupboard
  • Suited to small, medium and large-sized homes 
  • Easy to install, use and service
  • No need for separate cylinder or loft tanks
  • Built using top-quality components
  • Compatible with uSense smart room thermostat – can monitor your energy use and control your heating using a smartphone or tablet, wherever you happen to be
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Energy Saving Trust endorsed product
  • Excellent rating on Trustpilot – correct at the time of writing – January 2022
  • 7-year parts and labour warranty


  • None
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