The Science of ComfortTM
As HVAC professionals, one of our primary goals is to promote healthy indoor air quality in all spaces, and there are fewer applications where this is more important than in classrooms. It is estimated that approximately half of public school districts need to update or replace the HVAC systems in their schools.1
Topics: Displacement, HVAC, Engineering, Design Engineering, Tech Tip, ASHRAE 62, Filtration
Back in 2022, a mixed-use building in the Downtown East Village neighborhood of Calgary, AB, managed by the Calgary Housing Corporation, was identified as violating the city’s noise bylaws due to excessive noise emitted by its air-conditioning condensers. To address the issue, the city had initially planned to purchase and relocate new low-noise variable refrigerant flow (VRF) condensers.
Topics: Acoustics, Noise Control, Acoustic Louvers, Acoustic Panels, Engineering, Design Engineering
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.
Topics: Noise Control, HVAC Silencers, Pressure Drop, Velocity Profile, Terminals, HVAC, Engineering, Design Engineering
Fan coil units, or FCUs, are a quiet but crucial part of many HVAC systems, helping to maintain comfortable temperatures in buildings of all sizes.
Topics: Fan Coils, Controls, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering, Filtration
Understanding how much space a fan coil unit needs is imperative for mechanical system design. Incorrect assumptions can create deviations between contract documents and finished buildings, which can lead to change orders and increased project costs for building owners. The type of fan coil unit, the options it is configured with and the overall design of the building’s HVAC system all influence the final installation requirements.
Topics: Fan Coils, HVAC Fundamentals, HVAC, Engineering, Design Engineering
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