Understanding the Difference between Unvented and Vented Boilers

One of the aspects to consider when making the choice to replace your boiler is whether to get a vented or un-vented system. Most homeowners think about size, efficiency and cost but quite often forget about this important feature. Here are some things you should know about vented systems before a boiler installation.

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Why Replace Your Boiler With A Vented One

Vented Boilers

Vented boilers are old fashioned, and before the 1990s, they were the only ones allowed in homes. This type of boiler has a vent that works through atmospheric pressure. There is also a storage tank where the cold water goes from the mains. A vented system can be direct, meaning that the heating occurs in the boiler and the storage in the cylinder. An indirect system, on the other hand, heats the water in the cylinder by using a heat exchanger.

Vented systems are often the ideal choice for homeowners who are not that familiar with boilers. With the help of a professional, they can be easily installed and readily used. Another important fact to note is that these boilers are economical in the sense that they cost less upon purchase and are relatively easy to maintain.

Unvented Boilers

Unvented boilers have become more common in modern households. This boiler works with the mains water supply directly. Due to this, an unvented boiler offers higher flow rates compared to a vented one, and a cold storage tank is not needed. An unvented boiler works with immersion heater. The system also requires expansion vessels due to the high pressure coming for the mains.

With all those good points also comes the benefit of having the option to place this boiler in almost any location. Unvented boilers also don’t require the extra pipe work when installing a water storage tank. They may be on the pricier side compared to traditional boilers and require specialist installation, but it’s all worth splurging on if you are after reliability and convenience.

Making the Choice Of Boiler

Both vented and unvented boilers have their own advantages, and even disadvantages. One has to assess needs in a home to make the right choice. Fortunately, this is also something a heating professional can help you with. Be sure to find a Gas Safe engineer for such a task for best results.

Reference Sources

Vented and Unvented Hot Water Cylinders, www.boilerguide.co.uk
Heating: Beginner’s Guide, www.homebuilding.co.uk

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Posted in Boiler Installation.