Want to find the best combi boiler that also has a power output of 30kW? You're in the right place.
Looking for a new 30kW combi boiler?
With tons of options on the market from a wide range of high-quality brands, it can be hard to find the right boiler for you.
However, in this guide, we’ve narrowed things down to several of the best 30kW combi boilers on the UK market.
PS we fit new combi boilers with gas installation nationwide. Simply answer these questions, get your fixed price and you could get it installed as quickly as tomorrow.
What is a 30kW Combi Boiler?
Each boiler’s capacity to meet heating demands can be determined by its output which is measured in kilowatts or kW.
In general, the higher the heating and hot water demand, the higher you’ll want the output of a boiler to be.
As for 30kW combi boilers, in particular, these appliances are ideal for homes with around 10-15 radiators.
However, if your home has about 15-20 radiators, then a 30kW output would be suitable if you were to go with a system or heat-only boiler instead. However, presumably, you want a combi boiler, just like around 70% of UK homes.
Among the reasons that most UK homeowners prefer combi boilers is that heat-only boilers (i.e., regular boilers) can only be installed under certain circumstances.
In addition, combi boilers exist as a single compact unit without the need for a separate storage tank.
The good news is that you can avoid splashing out on a particularly large boiler, such as a 40kW option (if beyond the needs of your home) thanks to how efficient modern boilers are.
So, if your property has about 10-15 radiators then a 30kW combi boiler is likely an ideal option for you.
If you need help determining who offers the best combi boilers on the market, we have an ultimate guide on this, or you can simply use our quick calculator to find out which boiler is best for your home.
Best Affordable 30kW Combi Boiler
Now it’s time to get to some of our favourite 30kW combination boilers. First, we’ll look at the top budget 30kW combi boilers on the UK market.
If you only want the best premium options, skip to the next section where we’ll look at the most appealing high-end 30kW combi boilers.
For each of the appliances discussed in this section, we’ll look at their qualities, features and average costs.
Baxi 600
If you’re seeking a budget compact combi boiler, then this option from Baxi might be just for you. The Baxi 600 is available in two models with outputs of 24kW and 30kW each.
Baxi as a brand is popular for its affordable boilers. They also have a solid 4.5-star rating on Trustpilot.
Baxi 600 Features, Qualities and Warranty
Compact boilers are becoming increasingly popular lately. Many homeowners want to save on space when purchasing new appliances in this day in age, partly because of rising house and rental prices.
With space being less affordable, space-saving appliances are therefore more appealing. And even if there’s plenty of space in your home, a compact boiler like the Baxi 600 can still fit neatly away in the corner without becoming something of an eyesore.
The Baxi 600 comes with a seven-year warranty and its dimensions stand at 390mm (W) x 700mm (H) x 285m (D). The Baxi 600 is also made in the UK and its pipes are concealed by the facility within the appliance’s casing. Its energy efficiency rating stands at 93%.
Installation Cost
You can purchase the Baxi 600 30kW combi boiler for about £850 standalone. The total installation cost (including the price of labour) would likely land somewhere between £1,650 and £2,150.
This is a fairly good deal when most 30kW combi boiler instalments would set you back about £1,800 to £2,400 on average.
Ideal Logic Plus
This combi boiler from UK brand Ideal Heating is available in 24kW, 30kW and 35kW models. While Baxi is a popular brand, Ideal have a higher rating on Trustpilot and is considered more of a premium brand.
Features, Qualities and Warranty
The Ideal Logic Plus, like the Baxi 600, is also compact with dimensions of 395mm (W) x 700m (H) x 278mm (D).
The Logic Plus 30kW model also comes with a seven-year warranty. However, Ideal provides a ten-year guarantee for their heat exchangers (one of the costliest boiler parts to repair/replace). It has a 94% energy efficiency rating.
Installation Cost
You can expect to pay about £850 to purchase a 30kW Ideal Logic Plus combi boiler. The total installation cost would end up from about £1,650 to £2,150.
As you can see, this boiler has plenty in common with the Baxi 600. However, it arguably comes with some advantages that give it a little bit of an edge in terms of value for money.
Note: remember that you can pay for your new boiler on finance and spread the cost, check out our full guide for more info.
Best Premium 30kW Combi Boilers
We’ll now look at our favourite high-end 30kW combi boilers on offer. While not the cheapest 30kW combi boilers, these boilers bring fantastic quality, reliability and longevity.
If you want the very best, consider one of the following appliances.
Worcester Bosch Greenstar 4000
One of our favourite boiler brands on the market is Worcester Bosch. We’ve ranked this company fourth in our list of the best boiler brands.
Also, their boilers have been winning the Which? Best Buy Award for the last ten years. They also have a 4.6-star rating on Trustpilot from nearly 30,000 customer reviews.
Features, Qualities and Warranty
Worcester is clearly a force to be reckoned with in the boiler market and one of their best combi boilers has to be the Greenstar 4000. This appliance is offered in various sizes such as 25kW and, of course, 30kW.
The Greenstar 4000 30kW combi boiler has a fantastic 94% energy efficiency rating as well as a ten-year warranty.
This boiler is perfect for small to mid-sized homes and comes with dimensions of 400mm (W) x 724mm (H) x 310mm (D). The Greenstar 4000 also offers ease of access thanks to its removable side panels.
One notable advantage of the Greenstar 4000 combi boiler is how eco-friendly it is. This is largely thanks to its modulation ability standing at 1:10.
This essentially means that the boiler can reduce its capacity to match that of a 3kW boiler when heating demand is down (i.e., it would become ten times smaller than its standard 30kW capacity).
Not only can modulation keep your energy bills down, but it also lowers the boiler’s wear and tear, which in turn prolongs its life expectancy.
Installation Cost
The standalone/supply cost of the Greenstar 4000 30kW model is around £1,000 to £1,300 with the total instalment cost being approximately £1,800 to £2,600.
While you pay more for a boiler like this, you get exceptional quality and a range of advantages that premium boilers offer.
Viessmann Vitodens 100-W
This next appliance is from our favourite boiler brand on the market. Viessmann is a top-of-the-lot German brand with a five-star reputation.
Not only that but seven Viessmann boilers have been awarded the Which? Best Buy Award.
Features, Qualities and Warranty
Looking at the Vitodens 100-W combi boiler, this option is available in a variety of models including a 30kW boiler. This boiler has dimensions of 595mm (W) x 455mm (H) x 800mm (D).
One fantastic benefit to this Viessmann appliance is that it has Wi-Fi inside allowing you to control heating and DHW programmes with the use of the brand’s ViCare App.
This boiler is easy to operate and comes with an in-depth LCD touch display.
Further, it is certified for 20% hydrogen content in natural gas and no conversion kit is needed for LPG use. This boiler is suited for homes with as many as three bedrooms and it features a ten-year guarantee.
Installation Cost
Pricewise, the Vitodens 100-W 30kW model costs about £2,300 to £2,700 standalone bringing the total installation price to around £3,100 to £4,000. Clearly, this puts it among the most expensive boilers on the market.
However, you get what you pay for when it comes to the Vitodens 100-W with exceptional quality and high-end modern features. All in all, this Viessmann combi boiler is a superb product.
Worcester Bosch 8000 Style
Last but not least we have the Worcester Bosch 8000 style. This combi boiler is another fantastic premium option. The Bosch 8000 Style is available in five models with outputs ranging from 30kW to 50kW.
Features, Qualities and Warranty
The 8000 Style 30kW combi boiler has dimensions of 440mm (W) x 780mm (H) x 365mm (D).
Beyond that, it comes with a 94% energy efficiency rating and a flow rate of 12.3 litres per minute. This makes it well-suited to small properties with a single bathroom.
The warranty of this Worcester Bosch 30kW boiler can be up to twelve years if you have it installed by a Worcester Bosch accredited installer.
Installation Cost
The average supply cost of the 8000 Style 30kW combi boiler is £1,300. This means that you can expect to pay somewhere between £2,100 and £2,600 in total to have this boiler installed.
Best 30kW Combi Boiler: Verdict
We’ve just looked at five exceptional 30kW combi boilers available on the UK market. All boilers discussed have plenty to offer in their own right.
With that said, if it’s an affordable option you want, we’d suggest that the Ideal Logic Plus 30kW Combi Boiler is the go-to selection.
As for the premium boilers we’ve reviewed, we’d argue that the Worcester Bosch Greenstar 4000 takes the cake when it comes to value for money. If money is no object, you might want to go with Viessmann’s Vitodens 100-W 30kW Combi Boiler.
Ultimately the best 30kW combi boiler for you will come down to your preferences and budget.
Next Steps For Your New Boiler Journey:
When planning to install a new boiler for your home, there are several important factors to consider. Make sure to refer to the following guides to help you make informed decisions:
To dive deeper into these topics, head over to our advice section, or check out our YouTube channel to learn more.
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