Hot Water Coil / Steam Coil
Engineered for air heating, reheating, humidity control and industrial process heating using hot water or steam as the heating medium.
🔥 Efficient Air Heating & Reheating
Hot Water Coil and Steam Coil are finned-tube heat exchangers designed to transfer thermal energy from hot water or steam to an air stream.
The heating medium flows through the coil tubes while air passes across the extended fin surface. Heat is transferred from the fluid through the tubes and fins into the air, providing effective heating for HVAC, AHU and industrial process applications.
♨️ Hot Water Coil vs Steam Coil
Hot Water Coil
Uses circulating hot water as the heating medium. Commonly applied for AHU reheating, supply-air temperature control, humidity control and industrial heating processes.
Steam Coil
Uses steam supplied from a boiler for higher-temperature air heating. Proper steam distribution and rapid condensate drainage are important considerations in steam-coil system design.
⚙️ How the Heating Coil Works
📐 Custom Coil Specifications
🔧 Available Construction Options
| Component | Available Specification |
|---|---|
| Coil Type | Hot Water Coil / Steam Coil |
| Heating Medium | Hot Water / Steam |
| Tube Material | Seamless Drawn Copper Tube |
| Tube Diameter | 3/8" Ø / 1/2" Ø / 5/8" Ø |
| Fin Material | Aluminium / Copper |
| Fin Spacing | 3 – 20 FPI (Fin Per Inch) |
| Fin Surface | Corrugated / Sine Wave / Enhanced |
| Standard Casing | Galvanized Steel |
| Optional Casing | Stainless Steel 304 (2B) / 316L (2B) |
| Header Material | Copper / Galvanized Steel / Schedule 40 Steam Pipe |
| Special Protection | Marine / Corrosion-Protection Coating Available |
💧 Hot Water Coil
Hot Water Coil operates similarly to a chilled-water coil, but uses hot water as the heating medium. Typical hot-water temperatures can range from approximately 40°C to 80°C.
In AHU applications, a hot-water coil may be installed downstream of the cooling coil for air reheating and relative-humidity (RH) control. Hot-water coils are also suitable for food-processing, timber-drying and other industrial heating applications.
♨️ Steam Coil
Steam Coil is designed for high-temperature air-heating applications. Steam supplied from a boiler transfers heat through the coil tubes and fins to the passing air stream.
Steam temperature is normally above 100°C. Proper system design is important to allow condensate to leave the coil efficiently and prevent condensate accumulation inside the coil.
🛠️ Custom-Made to Your Heating Requirements
Each heating coil can be designed according to the required heating capacity, airflow, operating medium, installation dimensions and application conditions.
🏭 Typical Applications
🧪 Pressure & Leakage Testing
Coils are 100% leak tested under water using high-pressure dry air at 350–400 PSIG to verify coil integrity before delivery.
📋 Need a Replacement or Custom-Made Heating Coil?
For accurate selection, please provide the coil dimensions, airflow, entering and leaving air temperatures, heating capacity, hot-water inlet/outlet temperature or steam pressure/temperature, tube rows, fin spacing and connection sizes whenever available.
Need a Custom-Made Hot Water or Steam Coil?
Contact RNA Engineering & Trading Sdn Bhd for custom-made Hot Water Coils, Steam Coils, replacement heating coils and HVAC/R heat exchangers in Kuala Lumpur (KL), Selangor and Malaysia.
Inquiry - Hot Water Coil / Steam Coil
