Reasons to Choose an Unvented Cylinder

About Unvented Cylinders

For the Homeowner

If you’re a home owner, your plumber, builder or hot water and heating specialist will be able to advise you on the best hot water solution for your home or building, depending on a range of factors, from the age and size of the building to the budget you’re working with. So what’s the difference between a vented cylinder and an unvented cylinder when it comes to heating your water? A traditional vented cylinder requires connection to  a water tank, usually in a loft or attic space, using gravity to deliver hot water to the home. This is done by use of an immersion or by an external source like a central heating boiler. An unvented cylinder uses a pressurised system, that has a direct feed from your cold water supply, so there is no need for a cold water storage tank in the loft or attic.

For the Installer

If you’re an experienced plumber or installer, you’ll already know that unvented cylinders have a high flow rate, which customers want, are energy efficient and a come with a long guarantee.

Good Reasons to Choose Unvented

Unvented cylinders are increasingly the chosen option in homes and larger buildings. There are a lot of good reasons to go with an unvented cylinder. Here are just some of them:

Unvented cylinders can be installed in lots of different areas of the home, giving more freedom in designing the space.

Unvented cylinders usually take up less space than older systems.

They use water directly from the mains, so need for a tank in the attic. This isn’t just good for saving space – it can also take away the possibility of freezing issues in winter.

Because they use mains pressure, they can provide a much more even flow for baths and showers.

Once installed, unvented cylinders can give you real savings in terms of energy efficiency; good for the environment and your pocket.

Because of a sealed system, there isn’t the risk of water contamination, of real concern to SMEs and families alike.

Of course another reason to choose an unvented cylinder is – ThermaQ. We manufacture our own and use only recognised installers.

The ThermaQ Range of Unvented Cylinders

At ThermaQ we make unvented cylinders, using the most up to date technology and manufacturing know how. You can view our full range here.

If you’re a contractor or home owner looking for the best advice on unvented cylinders, you can contact us using our online form or you can email: You can also phone us on 01 01924 270847 and one of our experts will be delighted to chat to you.



Which Evocyl Hot Water Cylinder to Pick?

The ThermaQ Evocyl Range

We’ve balanced the need for top quality hot water cylinders with the need for affordability and Evocyl is the answer. At ThermaQ we use the most advanced water heating technology available and we develop some of our own too. Evocyl Cylinders use duplex stainless steel for maximum strength and the ability to resist corrosion. Using robotic technology, we’re able to make sure that the technical accuracy is second to none. Our cylinders also come with a 25 year guarantee against manufacturing defects. But which of the Evocyl range is best suited to the job?  Here’s a run down of the different Evocyl cylinders:

Evocyl Standard

The Evocyl Standard is designed to provide fast flowing hot water to one or multiple outlets. It’s also manufactured to guarantee quick recovery and to be more energy efficient than a usual cylinder. It also comes in sizes from 90L to 300L.

Evocyl Slimline

The clue’s in the name. With a diameter of only 475mm, the Evocyl Slimline is perfect for small spaces. A lot of older properties have smaller airing cupboards, as do a lot of flat conversions,  but it needn’t stop you have fast filling baths or good pressure in showers, as the Slimline gives you this, without the need to reconfigure existing spaces. It’s also a good way to save on building and plumbing expenses.

Evocyl Horizontal

For those awkward spaces, the Evocyl Horizontal offers increased siting options allowing larger storage capacities in areas that would not normally accommodate standard vertical cylinders.
All horizontal cylinders come with cradles too.

Evocyl Super Eco

The  Evocyl Super Eco comes as a response to our need to reduce our impact on the environment. We’ve increased the HCFC/CFC free insulation to 85mm, lowering the heat loss and reducing the amount of energy used by the cylinder, reducing fuel bills along the way. The Evocyl Super Eco can also help improve SAP performance in new build properties.

Evocyl Heatpump Cylinders

The Evocyl Heatpump Cylinder is as, you’d expect, designed for use with heatpumps. Purpose built to our exacting standards this cylinder meets the specific requirements of the market and our customers. It’s designed with a high efficiency heat exchanger to facilitate the transfer of the low temperature inputs of ground & air source heat pumps.

Evocyl Calorifier

The Evocyl Calorifier is designed for large volumes of hot water storage. Calorifiers are manufactured from high grade stainless steel with coil sizes to suit all applications and come supplied with money saving and highly accurate digital thermostats.

The Evocyl range of cylinders also comes with some pre-plumbed options.

You can also check out our Evocyl Air range, designed with environmental care and responsibility in mind.

About ThermaQ

ThermaQ manufacture all our domestic cylinders using Duplex stainless steel, here in the UK. Duplex has been selected against other materials such as copper, glass lined mild steel and lesser grades of stainless steel due to its substantially higher tensile strength and because it is a low carbon, high chromium content alloy. It allows units to be produced using thinner walls resulting in a lighter unit and offers a superior resistance to all forms of corrosion including, pitting, crevice corrosion and stress corrosion cracking.

We supply a range of hot water solutions for new builds and refurbishments alike.

You can contact us using our online form, by email or by calling +(44) (0)1924 270847 and one of our staff will be delighted to give you any information on our products.

ThermaQ continues to gain momentum – 2017 Graham’s Supplier of the Year

In December 2017, ThermaQ were extremely proud to receive Graham’s prestigious Supplier of the Year award. The key supplier nominees receive votes from all parts of the Graham team at Branches, in Sales, at the Distribution centre and the Head office and Executive Board.

Ian Kenny (Graham Marketing Director) commented;

In terms of the award for ThermaQ this was given due to not just the results that have been delivered in terms of sales, profit and customer growth it was as a result of a clear, well executed plan that was worked on at all levels in both businesses, based upon mutual trust and respect”.

Through striving for remarkable quality in our approach to every aspect of our business from product to aftersales, the ThermaQ team can be extremely proud of all their hard work and this prestigious award validates this commitment from the team.

Our vision of quality and service has previously seen us win other awards, including Graham’s award for product availability 2016 and Plumbase supplier of the year runner up in 2015.
ThermaQ have taken significant market share since its inception only 3 years ago and we continue to grow rapidly in a very competitive sector. While listening to our customer needs and working with our core principles, we will continue to provide our customers with the best possible trading environment, product and service.