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NAVIGATOR LAUNCHES NEW ANTIFREEZE VALVE


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eading heating and plumbing distributor Navigator has launched its new antifreeze valve onto the market, a part of Navigator's


Midbrass Renewable Range. This antifreeze valve is designed to work seamlessly with heat pumps and other renewable energy systems, providing reliable protection and enhancing system efficiency. It’s easy to install and prevents systems freezing


by detecting when the fluid in the system reaches below 3°C. The new valve features Automatic Temperature


Regulation. The valve automatically opens at 3°C to release water and prevent freezing and closes at 4°C to stop the discharge, ensuring seamless operation without manual intervention. By releasing water that would otherwise freeze and


expand, the valve protects the closed circuit heating system and connected components - pumps, valves and pipework - from potential damage. For absolute peace of mind, it is recommended


to install these valves on both the flow and return pipes, accommodating different operating pressures and enhancing system protection. The valve operates effectively within a wide temperature range (-30°C to 60°C) and can handle a maximum working pressure of 10 Bar, making it suitable for various environments and conditions. Constructed from durable materials – DRZ solid brass material - the valve is designed to withstand


harsh conditions and provide reliable performance over time. With a sensitivity of ±1°C, the valve ensures accurate temperature control, enhancing the safety and efficiency of the heating system. The valve must be installed vertically on horizontal pipework, ensuring proper drainage and


preventing freezing of the outlet port. It should be placed where the pipework is most liable to freeze, away from heat sources to maintain accurate readings. The valve is compatible with closed circuit systems and helps maintain system pressure, ensuring normal operation even in severe cold conditions. Recharging the system and resetting the pump can resume normal operation if the valve causes a shutdown due to pressure loss. For more information please contact Navigator on 01234 781234, email sales@navigatormsl.com or head for our website.


www.navigatormsl.com www.unicrimp.com


A UK first: Nuaire is the first UK ventilation manufacturer to use low carbon-emissions recycled & renewably produced steel


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ndoor air quality and ventilation manufacturing specialist Nuaire has announced that its Magnelis® steel based ventilations systems are now being made


from XCarb® recycled and renewably produced steel. Leading the way in sustainability, Nuaire is the first UK ventilation manufacturer to switch to this innovative steel, which will result in a 64% reduction in CO2 emissions on these products within the first year alone, compared with the same steel manufactured via the conventional steelmaking route. Products to benefit from the transition to XCarb® steel include Nuaire’s industry leading BPS air handling units and XBOXER XBC packaged heat recovery systems. For customers, this transition to a lower carbon- emissions steel has only positive benefits; the quality of Nuaire’s products will remain as before, with the additional benefit of helping to reduce embodied carbon within buildings. Embodied carbon - the carbon emissions associated with the material extraction and manufacture, construction, maintenance, refurbishment, and demolition of a building - makes up 20% of the UK built environment’s emissions. To reduce this, we need to use less materials in building design, and those materials that are required should be low carbon wherever possible. Magnelis made with XCarb® recycled and renewably produced steel has an embodied carbon footprint of just 0.898 tCO2e/t of material, which is considerably lower than the 2.51tCO2e/t of material of the steel previously used, meaning Nuaire’s ventilation systems manufactured with this innovative steel help reduce a building’s embodied carbon. “Mechanical, electrical and plumbing products are


typically 23% of the embodied carbon of a building” states Alun Thomas, Engineering Director of Nuaire. “This is a significant figure, so focussing on reducing it will make an important contribution to reducing a building’s overall embodied carbon. We understand customers are under pressure to reduce carbon and, like ourselves, have their own Science Based Targets they are trying to meet. We recognise the role Nuaire has to play in helping customers meet their targets, and transitioning to XCarb® low carbon- emissions steel is one of a raft of measures we are taking to support customers and, ultimately, the


planet. Being the first UK ventilation manufacturer to use XCarb® is a clear statement of our intent to drive sustainability throughout our product ranges and our manufacturing processes.” As part of this support and to assist consultants


and developers in measuring embodied carbon in their projects, Nuaire now provides detailed TM65 datasheets on the majority of its products to show the embodied carbon of individual products, including a breakdown of the calculation from material extraction through to end of life disposal. XCarb® recycled and renewably produced steel


has been developed by ArcelorMittal, Europe’s largest steelmaker, as a part of their decarbonisation strategy. Made in an electric arc furnace in Spain with guaranteed high scrap content and 100% renewable electricity, the steel has a third-party verified Environmental Product Declaration (EPD). Nuaire was introduced to XCarb® through Steelco.


The two companies have worked together for over 25-years, exploring new advancements in steelmaking with a lower environmental impact. Commenting on the relationship, Stuart Harper, Commercial Manager at Steelco, said: "Steelco is a proud partner to Nuaire and, with technical support provided by Arcelor Mittal, is excited to support their commitment to a more sustainable future, just one of many shared values between our companies. Now, as we look to the future, we have confidence that XCarb® plays a significant part in maintaining Nuaire's market-leading position while safeguarding the planet for future generations." As part of the Genuit Group, which has pledged to be


net zero by 2050 and has set rigorous carbon reduction targets, Nuaire has already made significant changes to


its operations which have resulted in tangible reductions to its carbon emissions. In 2024 alone, Nuaire removed 2,000 tons of carbon from its product portfolio by, for example, implementing careful material reduction and material substitution, such as changing to recycled plastic for its ducting. 2025 will see further progressive changes in Nuaire’s drive to reduce carbon, improve sustainability, and continue to provide customers with quality, reliable ventilation solutions.


www.nuaire.co.uk/about/xcarb Read the latest at: www.bsee.co.uk BUILDING SERVICES & ENVIRONMENTAL ENGINEER JUNE 2025 35 U


Unicrimp introduces Pink PVC Sleeving Reels


nicrimp continues to expand its comprehensive range of Q-Crimp cable management accessories, and its most recent development sees the launch of Pink PVC Sleeving. Cable sleeving is used to insulate and protect wiring, keeping it safe from abrasion and


temperature damages, to name a couple of functions. Unicrimp’s new Pink PVC Sleeving is designed for use in applications where ‘functional’ and ‘protective’ earthing need to be distinctive – a crucial element in order to comply with BS 7671 regulations. The standard BS 7671:2018+A2 identifies that functional earthing conductors must be identifiable to avoid confusion with other earthing systems. Specifically, it specifies that functional earth conductors should be marked with pink sleeving. The pink-coloured sleeving should be applied to the conductor’s insulation, making it visibly


distinctive from other conductors within the system. This is particularly important in complex systems that incorporate multiple types of earthing, as it helps electricians and engineers quickly identify and correctly handle the functional earth conductors, ensuring safety and efficiency in the installation process. It can be used in, but is not limited to, a range of applications including telecommunications, fire


detection, medical devices and industrial control systems. The new sleeving is available in three sizes - 100M X 2MM, 100M X 3MM and 100M X 4MM. Unicrimp offers a full range of colour coded PVC sleeving and heat shrink options, including black,


grey, brown, blue, and mixed reels. They are available in a variety of lengths and can be cut to size to suit the task at hand. The full range is available to view on the Unicrimp website.


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