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Baxi 100 Combi LPG

The Baxi 100 Combi LPG can be kept in a kitchen cupboard and is ideal for properties that are not connected to the gas grid.

If you want a high-efficiency boiler but live off the gas grid, you may want to consider the Baxi 100 Combi LPG. It’s a lightweight and compact combination boiler that uses liquefied petroleum gas as its fuels source without the need for an LPG conversion kit. Plus, this boiler is A-rated for energy efficiency and meets the rating requirements for Boiler Plus compliance.

How Much Does this Boiler Cost?

Baxi 100 Combi LPG prices vary between £600 and £780 including VAT, depending on whether you choose the 24kW or 28kW boiler. Obviously, the higher your heating and hot water demands, the higher the output you’ll need. You also need to factor in the cost of installation, which is likely to be more than the cost of this boiler. It’s best to get a few quotes on the boiler and fitting work because prices also depend on which supplier you go with.

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

Combi boilers (or combination boilers) are usually recommended for homes with only one bathroom because they struggle to cope with multiple taps running at the same time. As they don’t require separate loft tanks or a cylinder for storing hot water, combi boilers are also ideal for properties with limited space. This particular combi is set up for use with LPG and comes in two outputs of 24kW and 28kW, meaning it’s best for small to medium homes that are off the mains gas grid.

To be on the safe side, you should consult a qualified heating engineer before purchasing the Baxi 100 Combi LPG. Not only with an experienced professional be able to tell you the correct boiler type for your home but also help you work out which size (kW) is best for your needs.

Is it a High Efficiency Boiler?

It is. The Baxi 100 Combi LPG has an efficiency rating of 89.1%, so it’s actually an A-rated LPG boiler. In addition to being endorsed by the Energy Saving Trust, the boiler has a Class 5 NOx rating so it’s environmentally friendly as well. What’s more, this boiler can be used with the uSense smart room thermostat that lets you monitor, schedule and control your heating from a smartphone or tablet to help you save energy and more money on your fuel bills.

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

All of the controls are concealed behind a panel to ensure they don’t get knocked or touched by young children. User controls include an operating mode selector switch with reset and adjustable hot water and central heating temperature controls. There is a bright LCD display, and you can choose from a wide range of optional controls, such as room thermostats and digital timers. The boiler also has an inbuilt frost thermostat and can be supplied with a choice of flue lengths.

How long is the Warranty on this Boiler?

If you choose to purchase the Baxi 100 Combi LPG, you’ll receive a 2-year parts and labour warranty as standard.

Baxi 100 Combi Size and Prices

ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
100 Combi LPG 24CombiH – 700 mm
W – 390 mm
D – 300 mm
11.5 l/min24 kWA 90% and above£600
100 combi lpg 28CombiH – 700 mm
W – 390 mm
D – 300 mm
11.5 l/min28 kWA 90% and above£780

Summary of Important Information

  • Priced between £600 and £780
  • Heating output of 24kW or 28kW
  • Hot water flow rates of 9.8 or 11.5 litres per minute
  • Dimensions of 700mm (H) x 390mm (W) x 300mm (D)
  • Uses LPG (liquefied petroleum gas) as its fuel source
  • A-rated for efficiency
  • Smart compatible
  • 2-year warranty as standard

Pros and Cons

You may find that your heating engineer recommends the Baxi 100 Combi LPG for your home because many technicians like the build quality of Baxi Boilers. To help you come to a decision, we’ve put together a list of all the pros and cons of this boiler.


  • Fits in a 300mm deep kitchen cupboard
  • Suited to flats and small to medium-sized houses without a mains gas supply
  • No need for separate cylinder or loft tanks
  • Easy to use and service
  • Nos Class 5 boiler – kinder to the environment
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • 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


  • Baxi boilers have and overall Which? score of 54%
  • 2-year warranty – would prefer a longer standard guarantee
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