Description

The Ferroli Optimax HE 31S has the largest output in this particular range of three system boilers manufactured by the company. The heat output will cope with larger properties and as with all Ferroli boilers, it has the benefit of a 50-year pedigree. The premix burner system is a major plus, as is the boilers low operational noise. This boiler is also compatible with the company’s own solar and underfloor heating systems. It is rated A in the SEDBUK scale, meaning it can boast top efficiency when it comes to gas usage and emissions.

Price Range £800 – £900

Pros

• Sound premix system
• A rated SEDBUK
• Operationally very quiet
• Great with Ferroli solar and underfloor heating systems
• Simple electrical connection

Cons

• Two-year guarantee seems a little miserly

Specifications

Type:	System
Boiler Output:	31 kW
Hot Water Flow Rate (L/min):	n/a
Clock/Timer:	LCD
Sedbuk Energy Efficiency Category:	A
Size (cm):	70 x 45 x 33
LPG Convertible:	Yes

BUYability Favourite Features

The biggest of Ferroli’s system range of boilers and it shares the same characteristics as its sisters and brothers. An advanced premix burner system will keep the gas bills down and it works well with the company’s additional heating systems (solar and underfloor). And, say the company, it doesn’t make a noise.

BUYability Ratings  

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Overall BUYability Rating  

Great top-end boiler which will do the job of keeping a larger property snug. Ferroli may not have a name you immediately recognise, but if your installer recommends one, don’t pull a face. These boilers will save you pounds!

Boiler Output Choices

Choose a model to suit your property

Model	Output (CH)	Typically Suitable for
Optimax HE 18S	18kW	Flat
Optimax HE 25S	24.6kW	Larger Flat/Small House
Optimax HE 31S	30.2kW	4-5 Bed Detached