Applications
Booster coils are ideal when fast delivery and straightforward installation take priority over customization. Available in flanged or slip-and-drive casing designs, they’re suitable for many applications.
Capabilities Overview
Coilmaster’s line of booster coils are designed for hot water or low-pressure steam heating. Available in 1- or 2-row configurations, these coils are pre-engineered to offer dependable performance and industry-leading lead times. Most orders can be shipped within one day to one week, making them a go-to option for fast-track projects.
Product Drawings
What Booster Coils Are and Why They Matter
Booster coils are supplemental heat-exchanger components that enhance temperature control and airflow performance in commercial and industrial HVAC applications. These booster coils are installed in series with other HVAC coils to add heating or cooling capacity where the primary coil alone cannot meet system demands. A booster coil is often used to overcome pressure losses, temperature drop, or limited heat transfer caused by long duct runs or high airflow requirements.
In a modern HVAC system, booster coils help fine-tune air temperatures without requiring a full system redesign. They are commonly applied alongside hot water coils, chilled water coils, heating coils, or even standard steam coils to improve downstream performance and maintain comfort or process conditions.
How Booster Coils Work
Booster coils work by increasing heat transfer between the air stream and the circulating fluid inside the coil. As air flows across the booster coils, additional thermal energy is absorbed or rejected, depending on whether the application is heating or cooling. Installing a booster coil in series with existing HVAC coils increases effective coil surface area, improving temperature control without significantly altering airflow paths.
These coils are typically placed after economizers, downstream of primary coils, or within long duct runs where air temperature loss occurs. Properly sized booster coils enhance heat transfer while maintaining balanced airflow and acceptable pressure drop. When applied correctly, a booster coil improves system output without adding unnecessary resistance to the duct system.
Key Benefits of Booster Coils
Booster coils provide a practical solution for HVAC systems experiencing uneven temperatures, insufficient capacity, or airflow challenges. They are commonly used in commercial rooftop units, large air handlers, series or parallel coil arrangements, and dedicated outdoor air systems.
Key benefits of booster coils include:
- Improved temperature control in long duct runs
- Enhanced heat transfer without replacing existing HVAC coils
- Added capacity for systems operating at higher airflow rates
- Increased flexibility for retrofits and system upgrades
- Better performance when space limits larger primary coils
By addressing performance gaps, booster coils help systems operate more efficiently while reducing comfort complaints and operational strain.
Selecting the Right Booster Coil
Selecting the right booster coil starts with understanding system airflow, temperature requirements, and available space. Key factors include CFM range, coil face area, and fin density, all of which affect heat transfer and pressure drop. Fluid type also plays a role, whether the booster coil is paired with water, glycol, or steam applications.
Material selection, connection styles, and coil orientation should align with existing piping and ductwork. Pressure drop must be carefully evaluated to avoid restricting airflow or increasing fan energy use. Proper booster coil selection ensures seamless integration with existing HVAC coils while delivering reliable performance.
Installation and Best Practices
Booster coils should be installed where they can improve performance without disrupting airflow. Common installation points include mechanical rooms, duct sections downstream of primary coils, or near terminal equipment. Adequate clearance around the coil helps ensure even airflow distribution and supports long-term serviceability.
Matching the booster coils with existing coil arrangements is critical. Airflow direction, piping layout, and coil spacing should be coordinated to prevent performance losses. Proper installation helps the booster coil deliver consistent results while maintaining system efficiency.
Get a Quote from Coilmaster
Booster coils offer a flexible way to improve HVAC performance when existing coils are not enough. Whether supporting new designs or system upgrades, booster coils help deliver better temperature control and system reliability. Coilmaster designs and manufactures custom booster coils to meet specific application needs. Contact us today to request a quote or technical consultation for your next booster coil project.