Best Boilers 2017
The important thing to note when selecting a boiler, is that it’s not just about the product. It is about the the entire ecosystem ie the company that makes it, the availability of parts, the reliability, usability, customer service, installers , controls . What may be considered best by one engineer may not necessarily be true for another engineer. Unfortunately there will always be some form of bias in these types of articles so will do our best to justify and provide reasons why we consider a boiler a best boiler.Please also note we are not compensated by any of these manufacturers for writing this article. As installers we have preferences for certain brands, however for this article we will try to go on facts as well as what is best for the homeowner and that may not always be best for installers or manufacturers.
Combi Boilers
As a minimum standard to make it into our Best Boilers 2017 Combi Boiler section we assess using the following attributes . Using these attributes ensures the home owner achieves a very good and efficient boiler. The preference is for boilers that allow maximum flexibility for consumers in choosing the controls that best suit them. OpenTherm capable boilers have a higher ranking than non opentherm capable boilers. This is due to the fact that OpenTherm Capable boilers allow modulating controls from independent manufacturers such as Nest or Honeywell rather than proprietary controls from the manufacturers of the boilers. These proprietory controls do offer you a few more features, however these are at the expense of locking the consumer into a particular brand. We do have some well known manufacturers that don’t support OpenTherm.
- Warranty minimum 5 years when installed by a Professional.
- OpenTherm Capability
- Good Customer support
- Modulating Controls
| Brand | Model | Fuel | Type | Max Power Kw | Standard Warranty (Years) | Pro Installed Warranty (Years) | OpenTherm Capable | Remote Monitoring | Additional |
|---|---|---|---|---|---|---|---|---|---|
| Atag | iC24 | Gas | Combi Boiler | 24 | 10 | 10 | Yes | Yes | |
| Atag | iC28 | Gas | Combi Boiler | 28 | 10 | 10 | Yes | Yes | |
| Atag | iC36 | Gas | Combi Boiler | 36 | 10 | 10 | Yes | Yes | |
| Atag | iC40 | Gas | Combi Boiler | 40 | 10 | 10 | Yes | Yes | |
| Atag | iC Ecomiser 27 | Gas | Combi Boiler | 27 | 10 | 10 | Yes | Yes | |
| Atag | iC Ecomiser 35 | Gas | Combi Boiler | 35 | 10 | 10 | Yes | Yes | |
| Atag | iC Ecomiser 39 | Gas | Combi Boiler | 39 | 10 | 10 | Yes | Yes | |
| Baxi | 424 Combi | Gas | Combi Boiler | 24 | 2 | 5 | Yes | No | |
| Baxi | 428 Combi | Gas | Combi Boiler | 28 | 2 | 5 | Yes | No | |
| Baxi | 624 Combi | Gas | Combi Boiler | 24 | 2 | 7 | Yes | No | |
| Baxi | 630 Combi | Gas | Combi Boiler | 30 | 2 | 7 | Yes | No | |
| Intergas | Combi Compact Eco RF 24 | Gas | Hybrid Combi Boiler | 24 | 2 | 10 | Yes | Yes[4] | Solar Compatible |
| Intergas | Combi Compact Eco RF 30 | Gas | Hybrid Combi Boiler | 30 | 2 | 10 | Yes | Yes[4] | Solar Compatible |
| Intergas | Combi Compact Eco RF 36 | Gas | Hybrid Combi Boiler | 36 | 2 | 10 | Yes | Yes[4] | Solar Compatible |
| Intergas | Combi Compact HRE 24/18 | Gas | Hybrid Combi Boiler | 24 | 2 | 7 | Yes | No | Solar Compatible |
| Intergas | Combi Compact HRE 28/24 | Gas | Hybrid Combi Boiler | 28 | 2 | 7 | Yes | No | Solar Compatible |
| Intergas | Combi Compact HRE 36/30 | Gas | Hybrid Combi Boiler | 36 | 2 | 7 | Yes | No | Solar Compatible |
| Intergas | Combi Compact HRE 36/40 | Gas | Hybrid Combi Boiler | 40 | 2 | 7 | Yes | No | Solar Compatible |
| Vaillant | ecofit Pure 825 | Gas | Combi Boiler | 25 | 2 | 7 | Yes [3] | No | |
| Vaillant | ecofit Pure 830 | Gas | Combi Boiler | 43 | 2 | 7 | Yes [3] | No | |
| Vaillant | ecofit Pure 835 | Gas | Combi Boiler | 35 | 2 | ||||
| Vaillant | ecotec exclusive Green iQ 835 | Gas | Combi Boiler | 35 | 2 | 7 | Yes [3] | No | |
| Vaillant | ecotec exclusive Green iQ 843 | Gas | Combi Boiler | 43 | 2 | 7 | Yes [3] | No | |
| Viessmann | Vitodens 100-W Combi 26kW | Gas | Combi Boiler | 26 | 5 | 10 | Yes [3] | No | |
| Viessmann | Vitodens 100-W Combi 30kW | Gas | Combi Boiler | 30 | 5 | 10 | Yes [3] | No | |
| Viessmann | Vitodens 100-W Combi 35kW | Gas | Combi Boiler | 35 | 5 | 10 | Yes [3] | No | |
| Viessmann | Vitodens 200-W Combi 26kW | Gas | Combi Boiler | 26 | 5 | 10 | Yes [3] | Yes | |
| Viessmann | Vitodens 200-W Combi 30kW | Gas | Combi Boiler | 30 | 5 | 10 | Yes [3] | Yes | |
| Viessmann | Vitodens 200-W Combi 35kW | Gas | Combi Boiler | 35 | 5 | 10 | Yes [3] | Yes | |
| Worcester | Greenstar 25i | Gas | Combi Boiler | 25 | 5 | No | No | ||
| Worcester | Greenstar 30i | Gas | Combi Boiler | 30 | 5 | No | No | ||
| Worcester | Greenstar 25Si | Gas | Combi Boiler | 25 | 5 | No | No | ||
| Worcester | Greenstar 30Si | Gas | Combi Boiler | 30 | 5 | No | No | ||
| Worcester | Greenstar 28CDi Compact | Gas | Combi Boiler | 28 | 5 | No | No | Solar Compatible | |
| Worcester | Greenstar 32CDi Compact | Gas | Combi Boiler | 32 | 5 | No | No | Solar Compatible | |
| Worcester | Greenstar 36CDi Compact | Gas | Combi Boiler | 36 | 5 | No | No | Solar Compatible | |
| Worcester | Greenstar 29CDi Classic | Gas | Combi Boiler | 29 | 5 | No | No | ||
| Worcester | Greenstar 34CDi Classic | Gas | Combi Boiler | 34 | 5 | No | No | ||
| Worcester | Greenstar 38CDi Classic | Gas | Combi Boiler | 38 | 5 | No | No | ||
| Worcester | Greenstar 42CDi Classic | Gas | Combi Boiler | 42 | 5 | No | No |
Appendix:
Efficiency
All boilers sold in the European union require an energy label. All boilers now sold in the UK are minimum ‘A’ Rated. Some boilers are however more efficient in there long term running even in this category. Important to note is the overal system efficiency of the heating system. Please read the article ‘Heating System Efficiency’ to gain insight into what makes a heating system highly efficient.
Limitations of this article:
We would like to bring to your attention that also we have chosen these boilers on good standards, sometimes the boilers that need to be chosen may be more specialised than any boiler in this list. Therefore in these situations only an experienced heating professional can specify specialist systems. This article is however applicable to the majority of the population even though some home owners/landlords may decide to choose lower quality boilers due to their budgets.