Hot Water Cylinders: Vented Or Unvented?

If you are searching the market for gas boilers Bristol your research may have thrown up a well-known debate over the use of either vented or unvented cylinders. These two systems operate very differently and as with most comparisons, the balance of pros and cons completely depends on your personal situation, set-up and preference. Our team of gas engineers at Taps-On Plumbing are seasoned experts and have experience in advising and installing a range of gas boilers Bristol.

When choosing between vented and unvented you should consider the following information and how it may work for you.

Vented Cylinders

Vented hot water cylinders are usually found in larger multi-story properties and are still a popular choice of gas boilers Bristol. They rely on a separate water tank, usually stored in the loft of a house to feed cold water down to the main heating cylinder where it is heated ready for use. As the water heats up it expands and uses the cold water pipe from whence it came as an escape route for any excess.

The key thing to remember is that this particular system relies on gravity to transport water from the cold tank to the heating cylinder which can result in a lack of water pressure. Vented cylinders are known to be very affordable and require minimal maintenance due to their simple construction. To get the most pressure from gravity, the cold water tank needs to be as high up as possible which is why they are often placed in the loft. Of course, this means that sinks and showers on the higher floors don’t always enjoy adequate pressure.

Traditionally, vented cylinders were made out of copper as this was thought to be the best way to store heat and provide a good heat transfer. In recent years modern vented systems have seen the addition of extra pre-spray insulation to maximise heat retention.  

Unvented Cylinders

Unvented hot water cylinders draw cold water from the mains and as such can make use of this source’s high pressure. This not only eliminates the need for a sometimes bulky cold water tank in the loft but also is great for high-pressure showers and taps.

Due to the savings in space and benefits of high pressure we tend to see unvented cylinders as the most popular choice of gas boilers Bristol. In addition, the fact that mains pressure is used to propel water throughout the system means that the cylinder can be positioned anywhere around a home.

Unlike with vented systems, there is no vent pipe for excess heated water to escape through so unvented cylinders regulate expansion pressure through either an expansion vessel or built-in air bubble

Relying on mains water can have it’s complications as if the mains is for whatever reason shut off, your home will not have access to hot water.

Looking For A New Hot Water Cylinder? We Specialise In Installing All Types Of Gas Boilers Bristol

Taps-On Plumbing is one of Bristol’s leading heating and plumbing companies. Over the years we have built up a sterling reputation for solid and reliable work which is carried out with respect and courtesy towards you and your home. It is through this combination that we are able to enjoy glowing review after review from our valued customers.

At Taps-On Plumbing, we offer peace of mind which is why we are Checkatrade verified. All of our engineers are Gas Safe approved and undergo constant development giving us a workforce equipped with unparalleled skill.    

If you are looking for advice and installation of gas boilers Bristol, give Taps-On Plumbing a call on 0117 911 8053 or fill out a form on our website.

Laurence Matone

Laurence is a content writer and marketing manager for Taps On Plumbing. He helps publish regular content and insights for customers and industry personnel.