The Science of Comfort

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Mitigating the Risks of Close-Coupled Silencers

Posted by Mauricio Salinas on April 15, 2025 at 9:00 AM

System Testing to Optimize Terminal Unit Acoustics

In many commercial HVAC systems, engineers pair VAV boxes, fan-powered boxes and fan coils with duct silencers to meet the acoustical requirements of a space. While all the components are tested to industry standards – AHRI 880 and AHRI 260 for terminal units and fan coils and ASTM E477-20 for silencers – the combination of these two categories in real-world installations isn’t always straightforward.

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Topics: Noise Control, HVAC Silencers, Pressure Drop, Velocity Profile, Terminals, HVAC, Engineering, Design Engineering

Water Coils for Air-to-Water Heat Pump Systems

Posted by Mark Mahon on March 11, 2025 at 9:20 AM

Choosing the Right Coil to Optimize Your System’s Performance

Air-to-water heat pump systems are highly efficient HVAC solutions, but optimizing their performance depends on addressing key factors – most notably, the hot water supply temperature (HWST). And when these heat pumps are paired with a VAV distribution system, it’s especially critical to select the correct coil configuration.

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Topics: Pressure Drop, Terminals, System Efficiency, HVAC Fundamentals, HVAC, Engineering, Design Engineering

How to Improve the Efficiency of Hydronic Reheat Systems

Posted by Mark Mahon on February 18, 2025 at 9:00 AM

Strategies to Save Energy and Reduce Costs

In the HVAC industry, we’re seeing the trend toward decarbonization and electrification affect the built environment more and more every year. It is therefore critical to improve HVAC system performance through better design, selection and control.

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Topics: GRD, Diffusers, Pressure Drop, Terminals, HVAC Fundamentals, HVAC, Engineering, Design Engineering

What Is a Single-Duct Hydronic Reheat System?

Posted by Mark Mahon on February 4, 2025 at 9:00 AM

Where Zone Control Meets Design Flexibility

As we discussed in our last blog post, single-duct VAV systems with hydronic reheat are one of the most popular commercial HVAC air distribution systems in North America. These systems provide heating, cooling and ventilation by regulating airflow and hot water.

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Topics: Terminals, HVAC Fundamentals, HVAC, Engineering, Design Engineering

What Is a Low Water Temperature Coil?

Posted by Mark Mahon on January 21, 2025 at 9:00 AM

How Choosing the Right Coil Can Optimize Single-Duct VAV Systems

When it comes to commercial HVAC air distribution systems, single-duct VAV systems with hydronic reheat are one of the most popular in North America. As decarbonization and electrification efforts continue to impact the built environment, it is critical to maximize the efficiency of these systems and reduce their natural gas usage.

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Topics: Pressure Drop, Terminals, HVAC Fundamentals, HVAC, Engineering, Design Engineering

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