Hot Water Coils

Hot Water Coils

         
Hot water coil structure


Hot Water Coil
Hot water coils are used to heat air streams. Air moves through the fin contact area, and hot water (usually around 180 degrees Fahrenheit) moves through the tubes.
Some typical applications for hot water coils:
·         Comfort Heating
·         Preheat
·         Reheat After Dehumidification
·         Boosting Air Temperature in Long Duct Systems
·         Fluid Process Heat
Hot Water Coils come in a variety of shapes and sizes, but there are some properties that are common in most hot water coils:
·         Rows
With hot water coils operating at high temperatures (typically 120-180 degrees Fahrenheit), we commonly see 1 or 2 row hot water coils.
·         Tube Diameter
5/8 inch tube diameter is the most common selection for hot water coils. This tube size is perfect for minimizing fluid pressure drop while maintaining heat transfer. 5/8 inch tubes also offer many wall thickness options, which can increase the coils’ lifespan before tube erosion becomes a problem.
·         Connections
Connections for hot water coils are typically MPT (Male Pipe Thread) and made of copper. Smaller coils may use copper sweat connections. Grooved connection types are becoming increasingly popular, and are available upon special request.

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