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Ideal Logic Max System 18 Review

Known for being an affordable alternative to other popular boiler brands, like Vaillant or Worcester Bosch, Ideal offers both energy-efficient and reliable boilers at a price that won’t break the bank. The Ideal Logic Max System 18 is an A-rated boiler model that’s suitable for apartments, as well as small and medium-sized homes. Belonging to one of Ideal’s best-selling ranges, keep reading to see if this is the system boiler your home needs.

Why Choose the Ideal Logic Max System 18?

Coming with an efficiency rating of 93%, the Ideal Logic 18kw system boiler works hard to reduce your energy bills. It’s a lightweight and compact model, as well as being easy to install. Thanks to its large, backlit display, the ease of use continues after installation too. 


Some of its key features are as follows:

Price £1025
Warranty 10-year warranty
ERP Rating A
Efficiency Rating 93%
Output 18kW
BTU 60,000
Quiet Mark Accreditation Yes
Boiler Size (H x W x D) 700 x 395 x 278 mm
Boiler Weight 31.5kg
LPG Compatible No
Condensing Yes
Mounting Wall-Mounted

When it comes to how many radiators the Ideal Logic 18 System can heat, it would be best suited to homes with around 10 radiators. In terms of property sizes, it’s best matched to small and medium-sized homes with one bathroom. 


Further cementing its green credentials, it comes with an 18kW output that can work to lower your energy bills, but being at the lower end of the output scale, it will perform at its optimum for those with lower heating and hot water demands. 


Coming in a scratch-resistant, durable casing, it’s well protected from damage but also benefits from being lightweight, compact and frost-resistant, too. The Ideal Logic Max S18 benefits from a 10-year warranty as standard which offers further reassurance towards its reliability (as well as peace of mind) that it’s covered should it develop a fault. 


Some further factors to consider include:


  • Comes with boiler frost protection
  • Compact installation, the S18 can fit in a kitchen cupboard
  • Compatible with Ideal heating controls


  • Not solar panel compatible
  • Can’t be used with LPG
  • Requires a separate hot water cylinder

Is the Logic Max System 18 Boiler Reliable?

The Ideal Logic Max range is known for being a reliable range of boilers, and one that’s billed as the brand’s premium line. There are a whole heap of features and benefits including a 10-year warranty, built-in frost protection, and scratch resistant casing. If one thing’s for certain, it’s that these boilers are built to last.

Are There Any Alternatives?

Some alternative brands that you might want to consider over the Ideal Logic Max System boiler include both Glow-Worm and the Worcester-Bosch range. See our handy table below comparing key features of the various brands’ 18kW boilers:

Brand Ideal Logic Max S18 Glow-Worm Energy 18s Worcester Bosch Greenstar 4000 System Boiler
Price £1025 £1,127 £1,245
Output 18kW 18kW 18Kw
ERP rating A A A
Energy Efficiency Rating 93% 93% 94%
Size (H x W x D) 700 x 395 x 278 mm 700 x 390 x 280 mm 724 x 400 x 310 mm
Weight 31.5kg 32kg 33.2kg
Warranty 10 years 7 years 5
Noise level 44dB 49dB 42dB
Wall Mounted Yes Yes Yes

The Ideal Logic Max System 18 does offer some advantages over the Glow-Worm and Worcester Bosch models in that it has a far longer warranty and is the most compact of them all. Whilst the Worcester-Bosch is marginally quieter than the Ideal model, it’s also over £200 more expensive and , in real terms, there’s actually very little difference between the two.

Frequently Asked Questions (FAQs)

How Long Does an Ideal Logic System Boiler Last?

The Ideal Logic Max System 18 should last between 10-15 years if it is regularly serviced. We would recommend a yearly service to ensure it works to the best level possible. Boiler technology evolves constantly so it is recommended that you upgrade your boiler every 15 years to ensure energy efficiency and to help keep your bills low!

Is the Ideal Logic Max System 18 a Noisy Boiler?

The entire Ideal Logic Max System range is quiet mark accredited and is known for its ultra-quiet performance. With a noise level of only 44dB, the Max System 18 will heat your home seamlessly without the worry of hearing its every working.

The Final Choice

Billed as their premium line, you can’t go far wrong with an Ideal Logic Max System 18 boiler. It’s a highly-efficient system from a market-leading brand. Compact in size, with plenty of high spec features, including the Ideal heating controls, this boiler will raise the temperature of your home and lower your bills all in one go! What’s not to like?

Interested in an Ideal Logic Max System 18 Boiler?

Head over to our product page to book an installation. Not sure whether this is the boiler for you? We’ve got plenty of options so try our Boiler Choice software to pick the perfect match for your home.