Unvented Hot Water Systems From Gas Connect

Unvented hot water systems are an ideal choice for homeowners who want powerful, reliable hot water while saving valuable space. An unvented hot water cylinder eliminates the need for a cold-water storage tank, yet delivers all the benefits of a traditional system — and more.​

The system works by connecting your gas central-heating boiler to an unvented hot water cylinder, usually installed in an airing cupboard. We then install the required controls and an expansion vessel to ensure safe and efficient operation.​

As there are no tanks in the loft, you gain extra storage space and benefit from improved water pressure throughout the property. Unvented systems are typically more expensive than conventional vented systems or combination boilers, but they offer excellent performance, flexibility, and long-term value.​

Installation must be carried out by a fully qualified and certified installer, which we can provide.​

If you’d like more information about unvented hot water systems, a tailored quote, or expert advice, please contact us for a no-obligation quotation.​

Available unvented cylinders include a range of sizes, such as:​​

  • Heatrae Sadia Megaflo HE
  • Vaillant Vantage

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