As combi boilers get smaller and more efficient components, their overall size also becomes compact and now you find small boilers that can provide high outputs. This helps when you are looking for boilers that can fit into kitchen cupboards out of sight. But most powerful boilers don’t fit into a standard size kitchen cupboard.
So here, we have found 5 boilers that are both compact and powerful. They will fit into the most popular size of kitchen wall cupboard so it doesn’t look any different from the others. They are also powerful enough to heat up 1-4 bedroom properties.
Best small boilers:
- Worcester Bosch 28 CDI Compact
- Ideal Logic C30
- Baxi 600
- Viesmann Vitodens 050-W
- Alpha E T-Tec 28
Best small boilers that fit into a kitchen cupboard
| Combi Boiler Brand | Power Output (kW) | Height (mm) | Width (mm) | Depth (mm) |
| Worcester Bosch 28cdi Compact | 28 | 690 | 390 | 280 |
| Ideal Logic C30 | 30 | 700 | 395 | 278 |
| Baxi 600 | 30 | 700 | 390 | 285 |
| Viessmann Vitodens 050-W | 29 | 707 | 400 | 350 |
| Alpha E-Tec 28 | 28 | 712 | 440 | 255 |
Difference between small and compact boilers
Although you may think they are the same, there is a difference in the trade. A small combi boiler is when the power output in kilowatts is between 24 and 30kW, rather than the bigger 36-42kW range. A compact boiler is when its dimensions are comparatively less than other models from the same manufacturer.
As manufacturers produce the latest boiler models, their aim is to meet both the technical and aesthetic demand of the customer, where the boiler is both powerful enough to provide adequate hot water and heating, but also be out of sight as much as possible to not get in the way.
What size boiler do I need?
Choosing the right size boiler for your needs is a very important decision, both for comfort and your pocket. The main factors to consider are the number of rooms in the property, the number of occupants, the number of bathrooms and demand for hot water.
When do you need a small boiler?
Small and compact combi boilers are ideal if you have limited room as they can fit into tight spaces. A small flat or apartment will be comfortably supplied with heating and hot water with one of these boilers, but they are powerful enough for larger properties too.
Are combi boilers suitable for small flats?
Combi boilers integrate hot water and heating systems into one compact unit so are perfect for small flats or homes, without the need for a separate tank. Out of the 3 different types of boiler systems, combis are the most suitable for smaller properties. Many manufacturers produce combi boilers for those having limited space.
What dimensions is a standard kitchen wall cupboard?
The industry standard and most popular height for kitchen wall units is 720mm (72cm), 360mm (36cm) in depth and 450mm (45cm) wide. If a boiler is wall mounted, you will want to fit it in a cupboard that matches the dimensions of the other kitchen units without sticking out.
All the boilers we have chosen fit within these dimensions and there is enough clearance for them to be serviced when the time comes. They are also familiar brands known to be reliable.
Best small boiler deals
Worcester Bosch, Ideal heating, Baxi and Viessmann all produce some of the most efficient small boilers on the market and there are good deals to be had for the reliability and cost effectiveness of their products. This is another reason we have chosen these particular boilers in the list. They are ideally priced for the long term with Boilercentral.com
All the boilers here are available from Boiler Central on the link below:
Pros
- Dimensions 690mm Height x 390mm Width x 280mm Depth
- Suitable for small, medium and large-sized properties with one or two bathrooms
- Fits in a standard kitchen cupboard
- Simple boiler control knobs with clear temperature display
- Low energy pump reduces electrical usage
- User-friendly displays for ease of use
Pros
- Dimensions 700mm Height x 395mm Wide x 278mm Depth
- Suitable for small, medium and large-sized properties with one or two bathrooms
- Fully modulating operation to low outputs
- Compact and lightweight
- Wide range of additional flue options
- An easy to see pressure gauge
Pros
- Dimensions 700mm Height x 390mm Width x 285mm Depth
- Compact and lightweight design
- Can be installed in a standard cupboard
- Simple to use controls with LCD display
- Comes with 7 year warranty
Pros
- Dimensions 707mm Height x 400mm Width x 350mm Depth
- Ideal for installation in a kitchen cupboard
- Low CO2 emissions for reduced environmental impact
- LCD display for easy operation
- Class A-rated for energy efficiency
- Ideal for properties with up to 10 radiators with one bathroom
Pros
- Dimensions 712mm Height x 440mm Width x 255mm Depth
- High efficiency boiler at 93%
- Compact boiler for smaller properties
- Easy to access and use controls
- Seven-year warranty given as standard with this boiler
Kitchen cupboard safety clearances
Usually, room sealed boilers don’t require much space (under 10mm) when built into a cupboard, but with the door open, need around 500mm. It is important to remember that boilers need servicing and enough space must be left for this and when repairs are needed, the engineer will require adequate access. Check with the manufacturer for the boiler you install.
*The information in this article should be used for general guidance only and not as financial advice. Full details are on the link in the footer to our disclaimer page. Always discuss your requirements with a competent and suitably qualified professional before undertaking any work.
Affiliate disclosure
Heatology.co are participants in a variety of affiliate schemes which help fund and run this website, visitors who follow our links and purchase a product may earn Heatology.co a commission. The money we make from affiliate marketing costs you nothing but keeps us online, so thank you for your continued support!
