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Compare Sime Boiler Reviews


Sime is the perfect brand for homeowners that hold the environment close to their hearts. It has a track record spanning over 40 years spread across countries as far as North America and Chile.

The company was founded in Verona, Italy in 1972 and became the first one to produce a compact and efficient plate cast iron radiator. Since then, the brand has built reliable, high efficiency domestic and commercial boilers and other heating accessories with the environment in mind.

Their 10-year warranty on some of its boilers is one of the longest in the market and supports the company’s claim of using the best quality brass and stainless steel components when making their boilers.

As recent as 2014, Sime had another industry first production. They made the first hybrid wall-hung unit which comprised of a gas boiler, MEM control and a heat pump. This is in line with the manufacturer’s environment-conscious goal of reducing, reusing and recycling wherever possible.

Sime boilers are not only energy-efficient, they are also environmentally friendly and they carry the mantle not only in producing the boilers but also in the design of the boiler and even its packaging. Lovers of nature will definitely have an extra reason to consider buying a Sime boiler for their homes.

Typical Sime Boiler Prices

The Sime boiler catalogue is rich with options. It includes wall-hung boilers, floor-standing boilers, oil-fired units, solid fired units and the more recent high-efficiency range of the Murelle gas boilers.

With such diversity, finding the right boiler for your home no matter how unique your needs are is easier. You also have the challenge of choosing the right price for your boiler with so many options to choose from.

In addition to the different types of boilers that Sime offers in each category, each category also has variants in power output of the boilers which range between 12 – 35kW. That adds to the already extensive choice pool you can choose from.

Sime boiler prices are as diverse as the options that are available to you. They have boilers costing as little as £500 and as much as £2,300. The price you pay for your boiler is determined by the quality, output and type of the boiler.

The more recent additions of the Murelle HE range cost more but provide a premium experience to the buyer and come with a longer warranty, better efficiency ratings and most importantly, better reliability.

Why Choose Sime Boilers?

Choosing the best boiler brand is vital when buying a new boiler. With so many brands fighting it out, choosing one brand over the other can be difficult.

To stay ahead of the market, Sime has few factors that might capture your attention and provide you with the best experience compared to other brands.

To begin with, they have a full range of boilers which include gas and oil-fired varieties. You also have wall hung and floor standing boilers. Regardless of what your needs are, Sime has a boiler designed just for you!

Benefits of Choosing Sime Boilers


Most boiler manufacturers pride themselves in struggling to meet the set NOx emission standards. Sime has invested extensive research and technology in improving its boiler designs and making sure they are efficient and as safe as possible to the environment. Their dedication to being an environmentally friendly design has seen the brand go as far as cutting back on the packaging to save more.

Industry-leading technology

Sime is behind some of the most innovative heating products in the market. They were the first brand to produce a compact and efficient plate cast iron radiator and as recently as 2014, they launched a hybrid wall-hung has a boiler with a pump and MEM control. These trends speak to the dedication of the brand to produce efficient, environmentally friendly and practical heating solutions for its customer base.


Only a handful of manufacturers can boast of having the variety that Sime offers. Even though the recent addition of the Murelle range of boilers is responsible for catapulting the brand into the limelight, they have an impressive catalogue of boilers they have designed and manufactured over the years. These include oil fired and solid energy boilers that come in various power outputs for all homes.

Ultimate safety features

safety features are always overlooked when it comes to boiler design. Sime has reinvented the essence of having ample safety features with any boiler by having an adaptive gas valve that not only improves safety but also reduces maintenance requirements and makes commissioning the boiler easier.

Easy installation

Sime claims their easy to install and lightweight boilers can take as little as 10 minutes from box to wall. They come configured with DIN standard connections for quicker installation and a three-piece case for easier servicing and accessibility to all the parts.

Sime Boiler Warranty

One of the best ways to gauge the quality of any boiler you intend to buy is through the warranty. If the manufacturer doesn’t have faith in the range of products they offer, how should you?

Sime offers a standard 2-year warranty on most of its boilers. There are others that come with 5 or 10-year warranties depending on the type of boiler you purchase. You have the option of extending the warranties for an additional cost if you would like to continue enjoying the peace of having your boiler covered past the warranty period.

What’s covered by the warranty?

If your boiler suffers mechanical damage within the duration of the warranty, you will need to get in touch with Sime. They will send an engineer or an appointed contractor to inspect the boiler. The warranty will cover repairs, labour, or replacement as the company deems necessary.

Terms and conditions

There are certain requirements you need to follow to keep the warranty active. To start with, your boiler must be installed by a Gas Safe registered engineer and the Benchmark commissioning checklist completed by the installer and left with the boiler for reference.

The boiler warranty will commence on the date of installation and without proof of purchase, the warranty will commence on the date of manufacture as indicated on the data plate.

You will need to service the boiler every 12 months within 30 days of the installation anniversary of the boiler. The service should be done by a Gas Safe registered engineer and records added to the Benchmark.

You can read the fine print on the warranty card to find other responsibilities that you should carry out to make sure you have the best possible experience with your boiler warranty for the longest possible period.

Compare Our Range of Boilers

Sime is a compelling boiler brand that seems dedicated to blazing a trail where other brands have grown shy. It’s been a while since there was a significant advance in the boiler world. Sime broke the silence releasing a hybrid wall hung unit.

Given the history of the brand and its recent trends, it’s easy to see why buyers are picking interest in the range of boilers that Sime has to offer. Here is a full range of the types of boilers that the brand has to offer.

Sime Combi boilers range

Sime has a rich collection of combi boilers. Carefully designed and high outputs, this range of boilers is capable of providing your home with hot water on demand. They are highly efficient and space-conscious which makes them perfect for homes that are short on space.

Combi boilers only heat water when it’s needed. This helps to minimise wastage and maximise energy savings. The boilers don’t need a hot water cistern or a cold water storage tank to function. That allows you to save space in the loft.

In addition to dropping the significant weight of the tank and cistern, Sime combi boilers adopt a compact design that is easy to tuck in various spaces around the house. They also have wall hung options which are perfect if you don’t have an ideal space for the boiler.

The Sime range of combi boilers comes in two different outputs. The output rating is carefully calculated to ensure the range of boilers can serve the biggest number of games. You can choose to have 25kW or the 30kW depending on the size of your home and demand for hot water.

Benefits of Sime combi boiler range

  • 100% recyclable.
  • The boilers come with a built-in service timer.
  • LCD temperature and diagnostics display.
  • User-adjustable thermostatic control with a range of 20 – 80 degrees.
  • Efficient heating control connectivity.
  • Weather compensation sensor connection.
  • Class 6 NOx emission rating.
  • Compact and lightweight design.

Compare Sime Combi boiler prices

Choosing a boiler for your home is a big task. You need to make sure you get everything right the first time. While Sime boilers don’t have an extensive range of combi boilers to choose from, it’s advisable to still try and get the best rates the market has to offer.

See what the different installers have to offer to get the best prices for the boiler. While at it, you can try and get quotes for the boiler installation since that is exclusive of the boiler price.

To get free boiler installation quotes, you can fill out a quick enquiry and we will link you up with installers in your area who will provide you with competitive no-obligation and free quotes that you can use to compare and get the best rates and boiler.

For the prices of different Sime combi boilers in the market, have a look at the table below:

Sime Boiler Problems and Common faults

Are you having problems with your new Sime boiler? This guides will help you understand your new boiler better. You will know what to expect and even some possible fixes that you could try before you call in an engineer.

Most importantly, the guide will let you know when it’s time to call in your boiler installer to have a look at the boiler.

PCB fault

Most of the boilers that had the PCB fault have since been fitted with a safety thermostat and no issues have been reported after. However, in case you notice your boiler overheating, it could be the PCB has a fault and you need to have it checked.

Suggested fix

If you suspect the boiler has a PCB fault, you should first turn off the boiler and disconnect it from the gas supply. It might be a fire hazard. Call in an engineer to have a look at the boiler. Depending on the findings, the boiler can be fitted with a new safety thermostat or the PCB replaced.

Diverter valve failure

You can tell your diverter valve is failing if you’re only getting hot water or if the hot water tap is only running lukewarm.

Diverter valves are tricky to diagnose. But some of the tell-tale signs are mentioned above. If you notice your system is not producing hot water and you have a diverter valve issues, there’s not much you can do.

Suggested fix

Call in an engineer who will either replace the diaphragm washer and spindles or replace the entire diverter valve. It’s important to be extra cautious when opening up a Sime boiler to avoid getting water on the electrical systems.

Boiler pressure too high and climbing higher

Boiler pressure is a sensitive matter when it comes to boilers. So much so that if the boiler pressure is not right, most boilers will lockout. Low boiler pressures are just as dangerous as high boiler pressure and you should keep a close eye on this.

Most experts think this could be a corrosion issue which causes the cold water to cross over and fill the heating circuit. Even if the boiler pressure is fine, the gauge might indicate that the boiler is increasing. Pitting in the plate heat exchanger is to blame for this error.

Suggested fix

The plate heat exchanger needs to be replaced. It is an easy task, but one that should only be handled by a qualified heating engineer. 

Contacting Customer Support


1A Blue Ridge Park
Thunderhead Ridge
Glasshoughton, Castleford
WF10 4UA

Phone Number:

+44(0) 345 901 1114



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