As you can see in the image above, if you found an unusual temperature or pressure reading at a point in the system, you could check the various gauges around the system to troubleshoot where the issue is coming from.

Waiting for hot water is tolerable in some circumstances, but a single dead-leg system in a large building is not fit for purpose.

Where minimising cost is a big factor in the project design, which it normally is, then a recirculation pump in a closed-loop system is the best way to proceed.

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A recirculation pump is a type of pump that is used to circulate water, usually in a closed-loop system like a 'hot water recirculation system'.

"The software offers precision through detailed result outputs and advanced options for efficient pipe sizing, allowing heating engineers to optimise based on parameters like maximum velocity and pressure drop."

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Whilst the recirculation pump is part of the plumbing system, it requires various members of the design team to allow for it in their own design.

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A complete guide to sizing Recirculation Pumps. Learn the calculations, know when they are required, and ensure they are installed correctly.

The BMS monitoring will inform the maintenance team of any issues with the pump by providing warnings to a central location.

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Have you ever waited a long time for hot water to come out of the tap? It is likely that the long wait is because the building has a dead-leg hot water system instead of a recirculation system.

CASE STUDIES Greengate, UK "I would estimate over the length of this project, I have spent 50% less time designing than I would on our previous software. The ability to output the design straight into Revit assisted clash detection and coordination." Read the full case study

A hot water recirculation system (with hot water recirculating pumps) prevents this long wait by constantly circulating hot water and minimises the length of the dead leg.

The pressure gauges provide you with the ability to check the temperature and pressure in various locations around the building.

The strategic placement of heat pumps and careful sizing of pipework were crucial in maintaining minimal pressure drops over an 18-metre distance."

"I would estimate over the length of this project, I have spent 50% less time designing than I would on our previous software.

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Because the recirculation pump's flow rate is usually lower than the system's peak flow rate, if it was on the flow pipework and a fixture was being used, the fixture would take the water.

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This level of detail ensured that the heating load accurately matched each space's requirements, minimising energy waste and maximising comfort.

Alternatively, insulation manufacturers usually have simpler heat loss data which you can use for your flow rate calculations.

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Providing multiple dead-leg systems is another common way to provide hot water in a high-rise building. They are especially common in apartment buildings, where every apartment has its own hot water plant.

Simply draw the layout of the hot water system, set your design parameters, and all of the hot water recirculation calculations will be undertaken.

If you do not communicate the various requirements to the rest of the team, they will not provide their services to it. This means there will be issues that need to be resolved later in the design stage, which will have significant consequences.

CASE STUDIES Salon Republic, USA "The quality of the designs saw significant improvement with the adoption of h2x." "The software offers precision through detailed result outputs and advanced options for efficient pipe sizing, allowing heating engineers to optimise based on parameters like maximum velocity and pressure drop." Read the full case study

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CASE STUDIES Award-Winning Heating Design "Using h2x was pivotal, allowing for precise heat loss calculations, pipe sizing and flow rates for each room. This level of detail ensured that the heating load accurately matched each space's requirements, minimising energy waste and maximising comfort. The strategic placement of heat pumps and careful sizing of pipework were crucial in maintaining minimal pressure drops over an 18-metre distance." Read the full case study

To undertake detailed calculations on the pressure loss through the system's pipes, valves and fittings, learn the process in our pressure loss blog post.