Challenges? No Problem

Construction constraints just mean creative approaches for Johnson Controls team

Contractors and solutions providers are constantly bombarded with challenges. Make it faster. Work cheaper. Give more.
But how’s this for challenging? Try installing HVAC and control systems in a three tower building complex that doesn’t have a dedicated facilities plant. And do it in 15 months. And make it more environmentally friendly. With the largest variable refrigerant volume system ever designed. And do it all while it’s occupied with tenants, going about their business day in a normal fashion. That means no disruptions, jerry-rigged construction entrances, dust piles and hardhat zones.
Looks like a job for Johnson Controls.

Energy, Environment and Solutions

Like many office buildings in Paris’ business district, Les Miroirs relied on an off-site power plant for its heating and air conditioning. Problem was, after two decades of use, the facilities plant was outdated and inefficient. What’s more, renovation and upgrades could be costly.
But the building’s owners decided to take control of their predicament, opting to explore the possibility of bringing plant services on-site. That meant attempting to retrofit HVAC systems into a building that was already up and running—with minimal disruptions. The owners also were keen on boosting the more than 20-year-old building’s environmental friendliness. To that end, Johnson Controls’ Energy, Environment and Solutions (EES) Team advocated using more environmentally conscious coolants, like Freon R410a, in the HVAC system. In addition, the EES Team sought to recycle all packaging and waste generated during installation.

Making It Fit

One of the largest concerns was housing the HVAC system, since the building previously relied on off-site plant services. That meant there were no accommodations built in for on-site services. Johnson Controls overcame the problem by installing more than 100 condenser units of the roofs of the complex’s towers, and adding 2,000 interior units. The system employs variable refrigerant technology, which uses heat pumps to heat in the winter and cool in the summer. And, the retrofit allows for fresh air ducts in every building office, ensuring that workers are afforded a healthier environment.

Make No Small Plans

Perhaps what makes the Johnson Controls solution so unique is the approach to construction. Since the building’s owners wanted minimal disruptions, intense planning and scheduling had to be undertaken. Because of Johnson Control’s efforts, €6 million was saved—workers didn’t have to be temporarily relocated and there was no resultant downtime. And the savings continue: The owners of Les Miroirs will enjoy guaranteed annual energy savings worth more than €200,000 for the seven-year period of the contract.
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