What is Cooling and Heating Coils in AHU?

Cooling and heating coils in AHUs are Key AHU parts provided by AHU manufacturer firms, for indoor climate control, ensuring comfort by adjusting air temperature as needed. Here, we’ll delve into the functions, types, and significance of cooling and heating coils in AHUs.

Functions of Cooling and Heating Coils:

Cooling Coils:

Air temperature reduction occurs as a result of heat being removed from it by cooling coils. They are essential to the process of air cooling, especially in warm or hot weather.

Here’s how cooling coils function:

Air Cooling:

Warm or ambient air is drawn into the AHU and passes over the cooling coils. Inside the Coils, a refrigerant, often a chilled liquid, circulates. The refrigerant absorbs heat, lowering the incoming air’s temperature.


Cooling coils aid dehumidification by condensing and removing moisture from the cooled air. This procedure reduces interior humidity levels, making the atmosphere more pleasant and reducing difficulties like mold growth and moisture damage.

Heating Coils:

Heating coils, on the other hand, serve the opposite function of cooling coils. They are responsible for warming the air when needed, typically during colder seasons.

Here’s how heating coils function:

Air Heating:

A heat source, such as electric resistance coils or hot water, is used in heating coils to raise the temperature of the air. The heat source warms the chilly air brought in from the building as it passes over the heating coils. This process ensures that the supplied air is at a comfortable and desirable temperature for occupants.

Maintaining Comfort:

Heating coils are essential for maintaining indoor comfort in cold climates. They help prevent discomfort due to cold drafts and ensure that the indoor environment remains warm and habitable.

Types of Cooling and Heating Coils:

There are different types of cooling and heating coils, each intended for specific purposes and efficiency levels. Some common types include:

Chilled Water Coils:

These cooling coils use chilled water as the heat exchange medium. Cooled water circulates through the coils, absorbing heat from the passing air. These systems conserve energy & found in large-scale HVAC systems.

Direct Expansion (DX) Coils:

DX coils use a refrigerant directly for cooling. They are more compact and efficient than chilled water coils, making them suitable for smaller HVAC systems.

Hot Water Coils:

For heating purposes, hot water coils use heated water to warm the air. They are energy-efficient and can quickly raise the temperature of the supplied air.

Electric Coils:

Electrical resistance is used by electric heating coils to produce heat.

They are straightforward to control, making them suitable for smaller spaces or as supplementary heating.

Steam Coils:

Steam coils use steam as the heat source for heating applications. They effectively provide rapid heating and are often employed in industrial settings.

Significance of Cooling and Heating Coils in AHUs:

The cooling and heating coils in AHUs are vital for several reasons:

Temperature Control:

They allow precise control over indoor temperatures, ensuring that the air supplied to building spaces is at the desired temperature range for occupant comfort.

Energy Efficiency:

Properly functioning coils contribute to the overall energy efficiency of an HVAC system. They help regulate temperature without excessive energy consumption, reducing operational costs.

Humidity Control:

Dehumidifying the air with the use of cooling coils helps to avoid excess moisture that can cause mold development and discomfort. By preventing excessive air drying, heating coils assist in maintaining interior humidity levels.

Year-Round Comfort:

Cooling and heating coils make it possible to maintain comfortable indoor conditions throughout the year, regardless of external weather conditions.

Climate Grip transforms essential HVAC system components, including AHU parts, especially the critical cooling and heating coils within Air Handling Units (AHUs). By integrating advanced temperature control and refrigerant management technologies, Climate Grip enhances cooling coils, optimizing efficiency, reducing energy consumption, and minimizing environmental impact. Cutting-edge heating coil technology provides precise temperature control, energy efficiency, and dynamic responsiveness. Climate Grip’s innovations significantly contribute to AHUs, promoting indoor space efficiency and sustainability, aligning seamlessly with global climate change initiatives, all while ensuring year-round comfort.


AHU cooling and heating coils are crucial HVAC parts that ensure year-round interior comfort. They provide Effective temperature control and energy-saving options for a variety of applications. These same parameters raise comfort levels and enhance HVAC performance as a whole. These coils are further optimized by an AHU manufacturer firm for greater effectiveness and environmental friendliness, ideally coinciding with efforts to combat global warming.

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