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Home Heating Systems & Boiler Guide

There are currently three types of hot water systems that are mainly used within the UK: instantaneous, open vented hot water systems and unvented hot water systems. Below is a bit more information on each as a home heating guide.

  1. Instantaneous: This is normally provided directly from the combination boiler, which also provides heating for the property. Water is not held in storage.
  2. Open Vented Hot Water Systems: A heat only boiler is usually in situ and an open vented cylinder is used to heat the hot water. The water is stored in a separate tank.
  3. Unvented Hot Water Systems: A system boiler is usually in situ and an unvented cylinder is used to heat the hot water. The water is also stored in a separate tank.

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