What is the difference between a direct and an indirect hot water cylinder?

Hear this out loudPauseA ‘direct’ cylinder is heated via an electric immersion and does not work with gas, oil or heat pump systems. An ‘indirect’ cylinder has coil running through the cylinder. ‘Primary’ heating water (not fresh water) passes through the coil and is heated by the boiler to around 70 degrees C.

What is the difference between a direct and indirect hot water cylinder?

Hear this out loudPauseDirect heating – the water is heated directly from the heat source either by an immersion heater or by the boiler. Indirect heating – the central heating and the hot water are separate. The water is heated via a coil (heat exchanger) from a boiler. water in the cylinder and heat it up.

What makes an indirect hot water cylinder indirect?

INDIRECT HOT WATER CYLINDER A cylinder is deemed ‘indirect’ whenever a heat exchanger is fitted within. This is to say, whenever a heat source is external to the cylinder and utilises a heat exchanger to impart heat to the contents of the cylinder the cylinder is deemed to be ‘indirect’.

How does an indirect unvented cylinder work?

Meanwhile, an indirect unvented cylinder makes use of hot water supplied by an external source such as a traditional home boiler. In such cases, a coil within the cylinder maintains the temperature of the hot water so that it stays at the temperature set by the cylinder’s thermostat.

What is the circulator on an indirect water heater?

The circulator is used to circulate hot water to and from the indirect fired water heater but the control at above left is an aquastat and is not the control that maintains hot water in the separate indirect hot water tank.

Do you have a direct or indirect hot water tank?

The indirect tank next to me here has usually an immersion heater in the top or the bottom, or if it’s an Economy one or if they’ve got some sort of photovoltaic solar panel system set up, they might have two. You might have a top one and a bottom one, but for the indirect hot water cylinders, that doesn’t matter.

Which is better direct or indirect hot water cylinder?

A direct cylinder is more easily fitted, taking about 4 to 5-hours to fit, where an indirect cylinder will most likely take 5 to 8-hours. Please visit how to check an immersion heater is working on the cylinder.

Where are indirect fired hot water heaters located?

Indirect fired water heater tanks for domestic hot water, such as the SuperStor TM are usually located close to the heating boiler and will have both cold and hot water lines leaving the tank to supply the building with domestic hot water and a loop of piping that runs between the [usually the] bottom of the tank and a nearby heating boiler.

Is it easy to replace a hot water cylinder?

Replacing a hot water cylinder is not a particularly common DIY task, however if yours has sprung a leak or if you need a larger one for whatever reason, then it can be as straightforward as removing one and inserting another.