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Unvented Water Heaters


Shop all Water Heaters & Pumps

At Element Shop we offer a variety of unvented water heaters that are suitable for use in residential and commercial buildings. With free delivery and great prices, we’re sure you’ll find the ideal model for you.

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Unvented water heaters, or sealed water heaters, are a type of water heating system that operate without a vent to the outside. They rely on a pressure-relief valve to regulate pressure within the tank. These water heaters are often more energy efficient than traditional vented systems as they do not lose heat through a vent. It is important to note that proper installation and maintenance are required to ensure the safe operation of unvented water heaters, as the release of hazardous gases like carbon monoxide can occur if not handled correctly.

Our Range

We offer a selection of models with capacities ranging from 30L to 150L, varying in size based on capacity. All self-install products come with a manual and diagram, and some of the larger ones include a kit with a step-by-step guide.

Should I Use Vented Or Unvented

A vented water heater uses a chimney or flue to release exhaust gases to the outside atmosphere, while an unvented water heater uses air from inside the room to combust fuel. Vented heaters are typically more energy efficient but require a chimney and are limited to certain fuel sources. Unvented heaters are typically smaller, easier to install, and can use a variety of fuel sources but can be less energy efficient and may pose a safety risk if not properly ventilated.

The type of water heater you should use depends on several factors, including:

  1. Fuel source: The availability and cost of different fuel sources in your area can impact the type of water heater you should use. For example, natural gas is often less expensive than electricity and may be more readily available in some areas, making a gas-fired water heater a more attractive option.
  2. Space: If you have limited space, an unvented water heater may be a better choice because it takes up less room.
  3. Safety: Safety is an important factor to consider. Vented water heaters are generally considered to be safer than unvented heaters because they release exhaust gases outside, but unvented heaters can pose a safety risk if not properly ventilated.
  4. Energy efficiency: If energy efficiency is a priority, a vented water heater may be a better option because it can be more energy efficient.

Ultimately, the choice between a vented and unvented water heater depends on your specific needs and circumstances. It's always a good idea to consult with a licensed plumbing professional for personalized advice and recommendations.

Why use Element Shop?

Element Shop has been a leading provider of underfloor heating systems in the UK for over 15 years. Based on customer feedback, we have expanded our range of products and offer a comprehensive catalogue for plumbers and electricians. Our products come with a minimum 1-year warranty and many carry lifetime guarantees. We provide free next-day delivery throughout the UK, no matter the order size. If you're not satisfied, we offer a 14-day return policy and will issue a refund for products returned in original condition. Additionally, we have a price match promise, guaranteeing that we'll match any lower price you find for our products.

If you’d like to find out more about our products, or would like to enquire about stock, you can call one of the team on 01473 559079 who will be on hand to help with your query.

Delivery Times

Most of our products are kept in stock, in our warehouse in Ipswich. This means we can offer free next day delivery to our customers. Each range and individual product, state their estimated delivery time during checkout. We deliver to most UK locations with free, next day delivery as standard. To discuss delivery details, call us on 01473 559079.