Are you looking for the best compact combi boiler to suit your small to medium-sized home?
This is a tough one. Choosing a boiler can be difficult, with so many ranges and outputs out there. It can seem a bit overwhelming. However, if you want to make the most out of the space in your home, a compact combi like the Baxi 600 or the Worcester Greenstar Si range may be on your radar.
So, what’s the difference between these two boiler ranges?
Well, as an experienced engineer, I’m going to compare the two below. This should give you a better idea of which range might be better suited to your property.
TIP: Always get your chosen engineer – or two or three – to measure your home’s heat loss and check you’re getting the right size boiler for your home.
The Baxi 600 range
The Baxi 600 range has been endorsed by the Energy Saving Trust, so you know it’s super efficient. It also comes with the option of integrating it with Baxi’s uSense controls, so you can operate these boilers from anywhere with a smartphone or tablet (as long as you have an internet connection!).
Output and flow rate:
- Baxi 624 combi boiler: 21kW to heating, and 25kW to hot water: 10.2 litres of hot water per min at 35 degrees Celsius
- Baxi 630 combi boiler: 21kW to heating, and 30kW to hot water: 12.2 litres of hot water per min at 35 degrees Celsius
Guarantee: 7 years (subject to keeping up with your annual service)
Size: 700mm x 390mm x 285mm – will easily fit into a kitchen cupboard 290mm deep
Best suited to: This range is perfect for a small apartment or home with 2 – 4 radiators. The 624 is more suited to a home with a shower, and will be slow to fill a bath, whereas the 630 can easily cope with a bath or high-pressure shower,
The Worcester Bosch Greenstar Si range
This isn’t the first time I’ve mentioned that these boilers from Worcester Bosch are some of my absolute favourite models from the brand. Both are very compact, and can fit just about anywhere! They’re also a dream to install (not that it matters too much).
Worcester Bosch is a brand with an unbeatable reputation in terms of providing quality, long-lasting premium boilers, and have also won Which’s ‘Best Buy’ seven years running, as voted by consumers and engineers alike. Now tell me that isn’t impressive! Let’s see how the Si range compares to the Baxi 600:
Outputs and flow rates:
- Greenstar 25Si: 24kW to the heating and 25kW to the hot water at 10.2 litres of hot water per minute (35 degrees Celsius)
- Greenstar 30Si: 24kW to the heating and 30kW to the hot water at 12.3 litres per minute (35 degrees Celsius)
Guarantee: 9-year no-quibble guarantee (when fitted with Worcester Bosch’s own filter and controls – subject to keep up with your annual service)
Size: 690 mm x 390 mm x 280 mm – which is perfectly suited to fit inside a standard kitchen cupboard
Best suited to: A small to medium-size property with 4 – 8 radiators and a shower, or a shower and a bath (depending on if you get the 25si or the 30si)
Advice from an experienced engineer
Feeling unsure of which boiler to get?
I’d say it really comes down to your home’s central heating demand, when choosing the right boiler from these two ranges. The Baxi 600 caters to homes that need a smaller central heating output, yet they’re still able to provide the same great flow rates as the Worcester Bosch Greenstar Si. It could also save you a few hundred pounds!
However, if you’re planning to update your house with an extension or an extra bathroom, you may be better off with the Greenstar Si, as it has that extra output to take on more radiators.
Conclusion
There we have it! A detailed overview of these two boiler ranges. They may sound quite similar, and both are a good, compact size, but the heating outputs and guarantees are the main differences here (as well as the price, that is – as Baxi tends to be much more affordable).
Do you have any questions about the difference between these two ranges? Let me know in the comments’ section below. I promise to reply!
