OSO Water Heaters

OSO Unvented Hot Water Cylinders | Unvented Water Heating

OSO Hotwater manufactures a wide range of premium stainless-steel water heaters meeting almost any hot water demand. The OSO range caters for all sorts of applications such as a school; factories; sports arenas; and hospitals. OSO Hotwater delivers top-quality water heaters with superior energy efficiency and cutting-edge technology. The full OSO product range is listed below: Looking for a certain capacity cylinder? Search by smallest or biggest OSO boilers.

Our OSO products are listed with installation and maintenance details, and manufacturer's information and design specifications are supplied on-webpage to ensure you pick just the right product for you. Check out How our OSO Hotwater stacks up to other cylinders with this from our advice centre.

Any questions? Feel free to contact the team on 01934 253600 where one of our friendly staff will be on hand to answer any questions you may have. We proudly present the OSO unvented water cylinder ranges below:

OSO Super Coil

The Super Coil series is the premier range of unvented water cylinders offered by OSO for the domestic market. These units come with several incredible features, offering internal expansion space, as well as partial pre-plumbing, these units are designed to minimise the plumber's time on site and reduce installation fees. They come with several great benefits such as quality operational efficiency and top-quality materials whilst coming in as some of the shortest vertical units, making them great where installation head height is at a minimum. We regard these units as some of the strongest offerings in the standard unvented indirect market - favourable in terms of performance and quality compared to the Megaflo and most other brands on the market. Luxury solutions from OSO.

OSO Super Xpress

The Super Xpress series is OSO's direct unvented water heating range suitable for domestic properties. These come with 3 KiloWatt elements and offer the pre-plumbing and internal expansion benefits that the above Super Coil series shares, making these some of the quickest-to-install cylinders on the market. The Super Xpress SX range is insulated with award-winning OSO Vacuum Insulation Panel (VIP) technology, ensuring reduced heat loss and energy consumption.

OSO Delta Coil

OSO Deltacoil heaters are some of the newest additions to the OSO stable of unvented indirect cylinders. The Delta Coil series is an award-winning hot water cylinder recognised as the most efficient product available. It incorporates unique Vacuum Insulation Panels and is the only full range of ErP A-rated cylinders available from 150 – 300 L. This cannot be understated, with electrically powered water heaters it can be incredibly difficult to achieve an operational efficiency of a rating higher than B, most cylinders over 170 Litres struggle to achieve better than a C rating energy efficiency. The Delta Coil is a marked improvement over the Super Coil flagship series and is perfect for any small to medium commercial space on top of being a luxury option for the domestic user.

OSO Delta Powercyl

The OSO Delta Powercyl series is designed to build further upon the success of the Delta Coil model, offering an even higher flow rate for the highest usage environments. Featuring all of the benefits of the above Delta Coil series, such as the internal expansion space, pre-plumbed set-up, and Vacuum Panel Insulation technology achieving A rating efficiency. Delta Powercyl is an ideal choice for small hotels/ guesthouses with multiple showers/baths. a 1- 6 bar adjustable PRV valve and oversized expansion vessel are supplied as standard.

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OSO Unvented Hot Water Cylinders | Unvented Water Heating

OSO Unvented Hot Water Cylinders | Unvented Water Heating

OSO Super Coil

OSO Super Xpress

OSO Delta Coil

OSO Delta Powercyl