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Unvented Cylinders

RM Unvented cylinders benefit from state of the art manufacturing processes and the highest quality stainless steel designed specially for the purpose of hot water storage vessels. Our extensive range of product lines and specifications means there is an RM Unvented Cylinder for every application.

  • Direct Horizontal Cylinder

    The Horizontal Direct is a purpose made horizontal all electric unvented cylinder, designed for properties where traditional cylinders cannot be sited due to height restrictions, where gas or a boiler may not be present or feasible. The cylinder is heating soley using the supplied factory fitted immersion heaters in the top of the tank.

  • Direct Large Unvented

    Designed for the large domestic and light commercial market the Direct Large Unvented extends RM's product catalogue even further. Building on the same technology found in our smaller units the Direct Large Unvented proves invaluable when large stores of water are necessary for the appplication.

  • Direct Prostel Cylinder

    The Prostel Direct is a purpose made all electric unvented cylinder, designed for properties where gas or a boiler may not be present or feasible. The cylinder is heating soley using the supplied factory fitted immersion heaters in the side of the tank.

  • Direct Slimline Cylinder

    The Slimline Direct is a purpose made all electric unvented cylinder with the added benefit of only measuring 475mm in diameter, designed for properties where gas or a boiler may not be present or feasible. The cylinder is heating soley using the supplied factory fitted immersion heaters in the side of the tank.

  • Direct Stelflow Cylinder

    The Stelflow Direct is a purpose made all electric unvented cylinder, designed for properties where gas or a boiler may not be present or feasible. The cylinder is heating soley using the supplied factory fitted immersion heaters in the side of the tank.

  • Homeflow Single Zone Pre-Plumb

    The Pre-Plumb has been designed to meet a demand in the market for a unit that arrived on site exactly as it was to be installed with the pipework and components in place ready for the final installation. This not only saves time and money on site but also makes units across a site completely standard ultimately improving reliability and customer support.

  • Homeflow Twin Zone Pre-Plumb

    The Pre-Plumb has been designed to meet a demand in the market for a unit that arrived on site exactly as it was to be installed with the pipework and components in place ready for the final installation. This not only saves time and money on site but also makes units across a site completely standard ultimately improving reliability and customer support.

  • Indirect Horizontal Cylinder

    The Horizontal Indirect benefits from its low head height requirement while retaining all the advantages of our indirect cylinders, built to work in conjunction with any indirect thermostatically controlled heat source such as a gas boiler. The internal corrugated coil provides excellent reheat performance and sacrifices nothing to achieve its horizontal orientation.

  • Indirect Prostel Cylinder

    The Prostel Indirect is the most popular unvented cylinder, built to work in conjunction with any indirect thermostatically controlled heat source such as a gas boiler. The exceptional value presented by our range of Prostel cylinders is unparalleled in the market place.

  • Indirect Slimline Cylinder

    The Slimline Indirect gives homes the power they need without compromising on space, built to work in conjunction with any indirect thermostatically controlled heat source such as a gas boiler. The performance from our top of the range high efficiency coil in coil inside our Slimline Indirect cannot be replicated by any other method.

  • Indirect Stelflow Cylinder

    The Stelflow Indirect is the most popular unvented cylinder, built to work in conjunction with any indirect thermostatically controlled heat source such as a gas boiler. The performance from our top of the range high efficiency coil in coil inside our indirect Stelflow's cannot be replicated by any other method.

  • Solar Direct Slimline Cylinder

    The Slimline Solar Direct gives those without any form of backup heating the chance to capitalise on the benefits of solar thermal without compromising on floor space, by providing 2 immersion heaters to back the solar thermal up and provide pacification everyone has the ability to take advantage of the suns energy.  Even at only 475mm in diameter the unit still features our high efficiency coil in coil heat exchanger for best in class performance.