November 4, 2021

Best Compact (Small) Combi Boilers for 2022

When shopping for a boiler, many people forget to check the physical dimensions of each model before purchasing and can sometimes end up with a brand new boiler that won’t fit in their kitchen cupboard.

Best Compact (Small) Combi Boilers for 2022

In this article, we’ll be taking a look at what compact boilers are and the best out there on the market.

What is a Compact Boiler?

When discussing boiler size, it’s important to be clear on exactly what you mean. This is because ‘boiler size’ typically refers to the power output of the boiler in kilowatts (kW) as opposed to its physical dimensions.

That’s why if you’re on the hunt for a small-sized boiler unit, you’re better off using the term ‘compact boiler’ as these are generally designed to fit in your average kitchen cupboard.

Best Compact Combi Boilers

Combi boilers are the most compact type of boiler as they combine both a water heater and central heating into a single unit, meaning there’s no need for additional hot and cold water tanks that take up lots of space. Here are our top compact combi boilers from smallest to largest:

Worcester Bosch Greenstar CDI Compact 28/32/36kW

W 390mm, D 280mm, H 680mm

The Ideal Logic Plus Combi is a fantastic little appliance, scoring highly on efficiency and delivering speedy heating and hot water, all whilst being able to tuck away into a kitchen cupboard. The boiler is supported by the Queen’s Award for Enterprise 2013 and the Good Housekeeping Reader Recommended Status in 2013 and 2017, so you can be sure it’s a good choice!

Viessmann Vitodens 100-W 30kW / 35kW

W 400mm, D 350mm, H 700mm

Efficient, compact, quiet and affordable, the Viessmann Vitodens 100-W combi boiler is the most popular solution available at iHeat. Reviewed as a Which? Best Buy in 2019, the Vitodens 100-W features innovative technology and services combined with reliability and longevity. This combi helps you to optimise your heating and save on energy costs and can all be done from inside your kitchen cupboard.

Viessmann Vitodens 050-W 29kW / 35kW

W 400mm, D 350mm, H 707mm

With compact dimensions, low weight and quiet operation, the attractively priced Vitodens 050-W is a low-cost gas condensing boiler that will integrate effortlessly into any living space and does not compromise on quality; making it ideal for both new build homes and modernisations. The Vitodens 050-W 29 kW Combi was also reviewed as a Which? Best Buy in 2019.

Alpha E-Tec 28kw / 33kw & Alpha E-Tec Plus 38kW

W 440mm, D 255mm, H 712mm

The entire E-Tec range is Alpha’s smallest yet. Being compact allows an easy fit in a standard kitchen cupboard and servicing is made easy with front access.

Best Compact System Boilers

As a whole, system boilers aren’t as compact as combi boilers as they require additional space for a hot water tank, however, the boiler unit itself should still be able to fit inside a kitchen cupboard. Here are our top compact system boilers from smallest to largest:

Ideal Logic+ 15kW 18kW / 24kW / 30kW

W 395mm, D 279mm, H 700mm

Just like its combi sister, the Logic Plus System boiler is a highly praised compact boiler, supported by the Queen’s Award for Enterprise 2013 and the Good Housekeeping Reader Recommended Status in 2013 and 2017.

Viessmann Vitodens 100-W 19kW / 26kW / 30kW / 35kW

W 400mm, D 350mm, H 700mm

Similar to its combi alternative, the Vitodens 100-W system boiler is efficient, compact, quiet and affordable. Featuring innovative technology and services combined with reliability and longevity, this boiler helps you to optimise your heating and save on energy costs.

Best Compact Regular Boilers

Regular boilers, also known as heat only and conventional boilers, are the least compact when you consider all of their parts including the cold and hot water tanks, however, the boiler unit itself should still fit inside a standard kitchen cupboard.

Worcester Bosch Greenstar Ri 18kW

W 390mm, D 270mm, H 600mm

The Worcester Bosch Greenstar Ri boiler is a compact, wall mounted boiler that is perfect for small and medium sized homes. Small enough to be installed in a standard kitchen cupboard, this boiler can be used in combination with a range of high efficiency cylinders for a complete Worcester system solution for your home.

Ideal Logic+ 15kW 18kW / 34kW / 30kW

W 395mm, D 279mm, H 700mm

Recipient of the Good Housekeeping Reader Recommended Status 2013 and 2017 and supported by the Queen’s Award for Enterprise 2013 , you can trust the Ideal Logic+ Heat Only Boiler to reliably heat your home.

Viessmann Vitodens 100-W 16kW / 26kW / 35kW

W 400mm, D 350mm, H 700mm

The Viessmann Vitodens 100-W is our most popular model at iHeat and has recently undergone a fantastic update for 2021 with brand new features. Having received the Which? Best Buy award in 2017, 2018 and 2019, you can count on this boiler for efficiency and reliability.

Compact Boilers with iHeat

At iHeat, you can get a fixed quote on a brand new, A-rated efficient compact boiler plus install in a matter of seconds. Get a price for your new compact boiler today!

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