Are you in need of the ideal Worcester Bosch system boiler for your small to medium Edinburgh home?
If so, the Worcester Bosch Greenstar 21i might be calling you! It can be a fabulous choice for a small or medium-sized property – especially if you already have a system boiler and are looking for direct swap. Alternatively, perhaps you own a regular heat-only boiler and want to switch to a more efficient system.
But with all the different kW boilers in the Greenstar i range, how will you know if the 21i is right for your home?
Well, as an experienced engineer who’s personally fitted many of these boilers over the years, let me tell you all you need to know about the Worcester Bosch Greenstar 21i system boiler.
Introduction
I’m so familiar with these boilers now that I know they’re dependable, robust and super efficient. They’re usually a good choice for homeowners who are in need of a replacement for their old regular boiler, with an existing expansion tank. They’re usually looking to upgrade from their old one-pipe central heating system, and want a more energy efficient boiler.
This makes the 21i a great option. After all, system boilers are much more quiet, clean and energy efficient in general. Just one thing; switching to a pressurised system can mean a bit of extra upheaval to deal with. It may not be the right choice if you don’t want to jeopardise your concrete or sealed flooring!
Output and flow rate
Firstly, let’s check out the basic outputs you can expect to your heating and hot water. The Greenstar 21i supplies 21kW to your heating and hot water tank, making it just perfect for a small to medium home with 6 – 8 radiators.
Just bear in mind, if your home is stone-built with high ceilings and minimal insulation, it might be best to size up. However, don’t worry. If you’re at all unsure, your chosen heating engineer will be able to help advise, and measure your home’s heat loss so you can get a better idea of which size you need.
They’ll also be able to check that your pipework is up to the job, as this is a high-efficiency boiler and must be fitted with a fully-pumped system.
Finally, because this is a system boiler, you won’t notice a difference to your flow rates. That is, unless you decide to fit it alongside a new unvented cylinder to give you an even better flow rate to your taps.
Size and special features
Measuring in at 710mm x 400mm x 330mm, the 21i is a wall-hung boiler. This means that you can’t cram it into a standard-sized kitchen cupboard. There are other options if you need a compact model, however this boiler will be perfectly fine on your kitchen wall, or in a larger storage cupboard.
The other bonus is that the 21i can also be combined with the brand’s own range of high-efficiency indirect or solar compatible Greenstore cylinders.
Guarantee
You’ll like this bit! The Worcester Bosch Greenstar 21i system boiler comes with Worcester Bosch’s fantastic no quibble 8-year boiler guarantee when installed by an accredited engineer – and it’s fitted with the brand’s own controls and magnetic central heating filter. This is a great, reliable guarantee – no nasty small print!
This is partly why Worcester Bosch is so popular as a brand. In fact, it’s been voted Which’s ‘Best Buy’ for several years running.
Tech specs
Let’s check out a quick summary of everything you need to know about the Worcester Bosch Greenstar 21i.
- Output: 21kW to heat radiators and hot water tank
- Ideal for: A small to medium property with 5 – 8 radiators
- ERP rating: A
- Guarantee: 8 years (when serviced annually by a Gas Safe registered engineer)
- Size: 710mm x 400mm x 330mm (wall-hung)
Conclusion
Could the Worcester Bosch Greenstar 21i be the ideal fit for your small to medium sized home? It’s a popular choice with my customers, and you can use the above information as a rough guide. However, the best thing to do is to get some advice from an experienced, Worcester Bosch accredited engineer.
They’ll be able to measure your home’s heat loss and tell you the exact size you need. They can also help you decide if an unvented cylinder is a good addition to your new boiler – or if you’re perfectly happy with your current flow rate. It all depends on what you need and whether or not you’re looking to futureproof your boiler!
Do you have any questions about the Worcester Bosch Greenstar 21i? Let me know in the comments’ section! I promise to reply!
