The Science of Comfort

Your Premier Source for All Things HVAC

What Is a Horizontal Fan Coil?

Posted by Bushra Rizvi on August 12, 2025 at 9:00 AM

Where Comfort Control Meets Quiet Efficiency

When it comes to maintaining occupant comfort in buildings with many individual rooms – such as hotels, healthcare buildings, dormitories and office spaces – horizontal fan coil units are behind-the-scenes heroes. They deliver individualized temperature control while staying out of sight and out of mind. Compact and quiet, these units are usually installed above ceilings, making them ideal for spaces where floor area is limited but where comfort can’t be compromised.

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Topics: Fan Coils, Condensate, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering

What Is a Fan Trench Heater?

Posted by Chris Burroughs on July 8, 2025 at 9:00 AM

Heat Smart, Save Energy

Fan trench heaters are specialized heating devices that are embedded within a trench in the floor or mounted in a low-profile enclosure at floor level, typically along the perimeter of a room or under windows. This type of heater combines a heating element, such as a multipass water coil or electric resistance heater, with a fan to enhance air circulation and heat distribution.

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Topics: Underfloor, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering

What Is an Application-Specific Controller?

Posted by Brad Cole on June 3, 2025 at 9:00 AM

A Range of Devices for Precise Control and Simplified Installation

In the HVAC industry, an application-specific controller is a device that comes preprogrammed with a sequence of operations for the equipment it’s intended to control. This could be anything from a boiler or air handler to a rooftop unit or terminal unit.

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Topics: Terminals, Controls, HVAC Fundamentals, HVAC, Engineering

How Do Fan Coil Units Work?

Posted by Braydon Whittington on April 2, 2025 at 9:00 AM

The Energy-Efficient Workhorse of Your HVAC System

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.

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Topics: Fan Coils, Controls, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering, Filtration

Space Requirements for Fan Coil Installations

Posted by Mark Mahon on March 25, 2025 at 9:00 AM

Best Practices for a Successful Mechanical System Design

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.

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Topics: Fan Coils, HVAC Fundamentals, HVAC, Engineering, Design Engineering

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