The Everflo System Fit cylinders are Factory assembled and both pre-plumbed and pre-wired for ease of installation. Everflo Indirect cylinders are designed to heat up quickly and to retain their heat for long periods. From single shower water heating to meeting hot water demands for sports pavilions – we have the hot water solution for your needs. Indirect cylinders are designed for use with traditional boiler (gas, oil or electric). They have also immersion heater fitted for a back-up heating.