Hot Water Systems and Safety (Unvented Cylinders) Course
Skills Training Group’s Hot Water Systems and Safety (HWSS) course supersedes the unvented cylinders course and now covers all hot water systems.
The HWSS curriculum has been updated due to the G3 Building Regulation being revised. The HWSS course includes content from the old qualification as well as new content from the new HWSS course.
Very positive feedback from all staff who were on the training, great trainers and they made the topic interesting and easy to understand.
Frequently Asked Questions
What is an unvented hot water system?
An unvented hot water system has no cold water feed tank, instead relying on direct mains pressure to operate a sealed (unvented) hot water cylinder. The unvented cylinder maintains pressure from an incoming water supply.
Because unvented systems are "sealed/closed," they need additional equipment, such as an expansion vessel, to manage the pressure fluctuations within the system as the water inside heats up.
What are the benefits of an unvented system?
Because there is no need for a separate cold water feed tank — and the piping that connects the tank to the cylinder — it takes less room. This also means they are easier and faster to install in a big commercial system.
The pressure in an unvented system is derived from the mains feed, which means it's usually greater. This means that with an unvented system, the outlet pressure is superior and taps and showers function more effectively.