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Recommended Combi Boilers
The combi boilers we recommend for a straight boiler swap.
Boilers from Union Plumbing
What you get with all Boilers
- Includes Installation
- GasSafe Registration
- Comprehensive Safety Check
- Manufacturer and Building Control
- Warranty / Registration
- Magnetic Filter
- Central Heating System Flush
- Boiler Compliant Wireless Thermostat
- Lagged Condensate Pipe Upgrade
- Improved Energy Efficiency
- Enhanced Convenience and Comfort
- Smart Thermostat Installation
- 5 Years
- 1-3
- 1
- 9.9L@35C Rise
- 19 kw
Glow-Worm Compact Boiler
- H 626mm
- W 400mm
- D 270mm
- 5 Years
- 1-3
- 1
- 9.9L@35C Rise
- 19 kw
Glow-worm Compact combi boiler range from Glow-worm is available in a great range of outputs, boasting a modern design that features a bright easy to use interface. The Glow-Worm Compact combi boiler range offers a sleek and modern design that will make using it a breeze. Its bright and user-friendly interface makes it easy and efficient to operate, giving you peace of mind and saving you time and energy.
- 5 Years
- 1-3
- 1
- 10L/Min @ 35 Degrees
- 24Kw
Worcester Bosch Greenstar 2000 Boiler
- H 724mm
- W 400mm
- D 300mm
- 5 Years
- 1-3
- 1
- 10L/Min @ 35 Degrees
- 24Kw
The Worcester Bosch Greenstar 2000 GR2300iW natural gas combi boiler is perfect for homes with one bathroom, such as apartments and small-medium houses. With an efficient A-rating, this 25 kW combi boiler is highly reliable and can be easily controlled with third-party external 230 V controls or a variety of Worcester mechanical and connected controls.
- 10 Years
- 1-3
- 1
- 9.6L @ 35 Degree Rise
- 24.8Kw
Vaillant Eco-TEC Pro Boiler
- H 720mm
- W 440mm
- D 338mm
- 10 Years
- 1-3
- 1
- 9.6L @ 35 Degree Rise
- 24.8Kw
Vaillant Ecotec's pro range of combination boilers combine the built in quality reliability and performance you would expect from Vaillant with a simple design and approach. The range features 24 kW, 28 kW and 30 kW models making this boiler perfect for homes with a smaller heating and hot water requirements. At Vaillant we are working towards low carbon solutions today. As part of the HyDeploy project Vaillant boilers have been tested with up to 20 Percent hydrogen blended with Natural Gas however we are currently undergoing many tests to each of our boilers to validate their compatibility with up to 20 Percent hydrogen.
- 5 Year Warranty
- 1-3
- 1
- A+
- B
Navien NCB 300 28kw, 37kw, 41kw
- H 680mm
- W 350mm
- D 285mm
- 5 Year Warranty
- 1-3
- 1
- A+
- B
Introducing our entry model, the NCB300 gas condensing combi boiler. It is designed for smaller properties and offers superior hot water comfort, powerful heating, and flexible installation options in a compact design. With exceptional reliability and DHW performance, the NCB300 is the perfect choice.
- 5 Year Warranty
- 2-3
- 1-2
- A+
- B
Baxi 200 24kW, 28kW
- 5 Year Warranty
- 2-3
- 1-2
- A+
- B
- 7Year Warranty
- 2-3
- 1-2
- A+
- B
Ideal Logic Plus C24
- 7Year Warranty
- 2-3
- 1-2
- A+
- B
The Ideal Logic+ C24 (ErP) Combi Boiler is one of those popular boiler installed in the UK market. The boiler comes in a range of sizes, 24kw, 30kw and 35kw meaning it is suitable for small and medium size homes up to 2 showers. The Logic Plus comes with a 7 year manufacturer backed warranty. One of the best features of this boiler is the Ideal Halo smart controller. This allows the customer to easily set on and off times from a smart phone as well as offering additional savings via weather compensation.
- 7 Year Warranty
- 1-5
- 1-2
- A+
- B
Keston C30 Combi 2
- 7 Year Warranty
- 1-5
- 1-2
- A+
- B
Choose the Keston C30 and C35 twin flue combi boiler for ultimate comfort with a single appliance. These compact wall hung combi boilers are perfect for new installations or replacements, and offer both efficiency and ease-of-use. The versatile twin flue design makes them an excellent option for central heating in different residential settings. This specialized boiler is also ideal for cellar or central location installations where traditional flueing is not an option.