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Home » Topics » MRO/Retrofit

MRO/Retrofit
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Feature

Retrofitting Backflow Preventers Without Undercutting Sprinkler Performance

Adding a new backflow preventer to an older system may negatively impact fire protection system performance. Here are some best practices to ensure existing sprinkler systems operate as intended when adding backflow preventers.
July 1, 2026
Christopher Culp, PE, CET

Some existing systems were never hydraulically calculated. Some were designed around pipe schedules. Some have little or no remaining safety margin. Add a backflow preventer without understanding the available water supply, system demand and device pressure loss, and a system that once appeared adequate may fail to deliver.


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Feature

Working in Existing Buildings

To address aging hospital systems, design teams are using facility condition assessments and carefully phased upgrades to improve reliability while keeping operations running.
July 1, 2026

In a 2025 article in Health Facilities Management titled “Deferred maintenance and master planning,” author Mike Mochel discusses the growing need for organizations to prioritize infrastructure renewal due to building age and systems that are beyond their serviceable life.


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Feature

Eastern State Hospital Completes Extensive Hydronic Retrofit

Mental health facility replaces a century-old deteriorating steam plant with a state-of-the-art hydronic system, improving comfort, efficiency and care across three campus facilities.
May 4, 2026
John Vastyan

Discover how Eastern State Hospital transformed its century-old infrastructure with a state-of-the-art hydronic retrofit, significantly improving patient comfort and operational efficiency.


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Feature

Commercial Cooling Flexibility Through Collaboration

Contractor Warren Systems worked with a team of pros to provide retrofit at a much lower upfront cost than a conventional VRF installation.
May 1, 2025
Dan Vastyan

Contractor Warren Systems worked with a team of pros to provide retrofit at a much lower upfront cost than a conventional VRF installation.


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Feature

A California Resort in Dire Need of a New Hot Water System

Omni La Costa Resort & Spa switched to tankless water heaters, saving space, time, and money.
December 4, 2023

This resort property case study demonstrates that condensing tankless water heaters can be used in commercial buildings with high water demand.


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Feature

Back To The Future Hydronics

Commercial retrofit leads to a 40% savings in fuel costs, not too mention a huge percentage increase in comfort.
January 6, 2023
John Vastyan

Commercial retrofit leads to a 40 percent savings in fuel costs.


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Feature

Nova Scotia Hockey Arena Retrofits Heating System

Canada is considered the birthplace of ice hockey, so it comes as no surprise that it’s also the national winter sport. 
August 5, 2022
Dan Vastyan
Community finds efficient, comfortable alternative to electric resistance fan coils that had always been used to heat various portions of popular facility.
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Feature

Bayview Tower Retrofits to Ultra Efficient Heat Pump Water Heating System

National engineering effort provides practical, climate-friendly solutions for commercial buildings to support plumbing professionals.
May 6, 2022

The Advanced Water Heating Initiative is a coalition of utilities, engineers, federal agencies, state and local governments, manufacturers and others working to scale heat pump water heater installations across the U.S.


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Feature

‘Three-quarters of our work is steam. We never leave Brooklyn.’

Steam systems may have evolved over the years, but Big Apple Installations knows the work still requires an old school skillset.
May 6, 2022
Dan Vastyan

Steam boiler systems may have evolved over the years, but Big Apple Installations in Brooklyn knows it’s still a niche that requires a specific skillset.


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Feature

Restoring the Corcoran

Modern technology aids renovation efforts for historic building.
February 7, 2022

Significant renovation was needed to meet modern code, ADA and educational programming requirements at the 125-year-old Corcoran School of the Arts & Design. Modern technologies aided in designing the new and upgraded building systems.


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