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Holiday Inn London, measures to prevent red rust and water leakage in air conditioning piping.

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Holiday Inn London, measures to prevent red rust and water leakage in air conditioning piping.

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Case study of the introduction of NMR pipe protectors in hotel air conditioning piping.

The Holiday Inn London Heathrow, built in the 1970s, is one of the largest hotels in the UK with a total of 617 rooms, located near Heathrow International Airport. The hotel faced serious leakage issues throughout its air conditioning piping due to extensive red rust corrosion, resulting in numerous holes in the pipes and water flooding in guest rooms and hallways. To address this, a red rust prevention extension device called the "NMR Pipe Protector" was installed on February 12, 2008. Seven days after the installation of the NMR Pipe Protector, the iron content in the chilled water of the air conditioning system, caused by red rust, significantly decreased from 0.669 mg/l before installation to 0.017 mg/l, confirming the rust prevention effect of the NMR Pipe Protector. One year after installation, the iron content in the chilled water dropped to nearly zero at 0.007 mg/l, completely eliminating new leaks, and the red rust in the air conditioning piping transformed to almost 100% black rust, proving that the piping could be extended in lifespan until the building's end of life.

Holiday Inn London, Heathrow: Measures for Preventing Red Rust and Leakage in Air Conditioning Piping | Japan System Planning Co., Ltd.

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~Extending the lifespan of old piping~ "NMR Pipe Protector" Cumulative installation record surpasses 4,400 buildings! (As of July 2025) Among them, over 3,100 buildings are condominiums. = Domestic Achievements = New Chitose Airport Domestic Terminal, JR Sapporo Station (JR Tower Building), Imperial Theatre Building (Tokyo Marunouchi), Yaesu Exit Hall, Famous Bookstore Building (Shinjuku), Hotel Toyokaku (Kyoto), Hotel Serve Shibuya, Shirakagi Care House (Saitama), Kawanishi Private Kushi Elementary School, Food Processing Factory, Major Automobile Manufacturer Factory (Fukuoka Prefecture), Kumamoto Red Cross Hospital, etc. = International Achievements = Buckingham Palace, London City Hall, British Museum, BBC, Christ's College, University of Cambridge, Royal Bank of Scotland, Harrods Department Store, Royal Garden Hotel London, UK Parliament, etc. ★ Featured in the Media "NMR Pipe Protector" ★ Selected as one of the top 10 rust prevention technologies in the world in 2020 and introduced in a U.S. magazine! Case studies and customer testimonials have been featured in many media outlets, including TV Tokyo's "World Business Satellite (WBS)", TOKYO MX's "Corporate Spirit", and specialized newspapers "Condominium Management News" and "Air Conditioning Times".

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