Hot/Chilled Water Coil is 3 row coil with 12 fins per inch and 1" copper sweat headers. This Hot and Chilled Water Coil has 3/8 high grade smooth 3/8" copper tubing with 0.006" corrugated aluminum fins and 20 gauge steel casing. Can be used with Hydronic Air Handlers, High Efficiency Gas Boilers, Cast Iron Boilers, Wood Burning Boilers( High Supply Temperature), High Velocity Air Conditioning Systems (SpacePak, Unico).
A Hot and Chilled Water Coil is a heat exchanger. It transfers heat energy between water and another medium (usually air) as quickly and efficiently as possible. Heating coils transmit energy from hot water to a stream of air, cooling coils extract energy from an air stream and add it to cold water.The coils themselves consist of a matrix of copper tubes through which the water flows. The tubes run back and forth between two end-plates in an arrangement that lets the air flow perpendicular to the tubes. The tubes pass through - and are attached to - a layered array of thin metal plates known as fins. The fins are also perpendicular to the tubes, which means they lie parallel to the direction of air flow. The air flows between them. Energy either passes from the water via the tubes and fins to the air, or from the air via the fins and tubes to the water.
The efficiency of this arrangement depends on the types and thickness of metal used, the integrity of the bond between tubes and fins, the number and the layout of the tubes and fins, the air flow, and the water flow. Our skill lies in pulling all those elements together to make a coil that's right for your application.
Types of Water Coil - Water to Air Heat Exchangers:
Low-Grade Hot Water Coil (LGHW)
Typically below 140 F. LGHW is associated with condensing boilers or waste water that has already lost much of its heat.
Low-Pressure Hot Water Coil (LPHW)
Typically between 140 F and 230 F. LPHW is the most common medium for coil heat exchangers.
Medium-Temperature Hot Water Coil (MTHW)
typically between 230 F and 260 F. To keep water liquid above 210 F requires additional pressure. 245 F requires a pressure of 30 PSi.
High-Temperature Hot Water Coil (HTHW)
Typically above 260 F. The most demanding condition for coil design. 285 F requires a pressure of 50 PSi.
When discussing heating coils, the terms "low", "medium", and "high-temperature" are interchangeable with "low", "medium", and "high-pressure".
Cooling (Chilled Water) Coils are characterised by the amount and type of Anti-Freeze (Glycol) used:
Pure water is the most common medium. It's used in applications that do not require the water temperature to fall below 30 F, or where there's no risk of freezing.
The introduction of anti-freeze (glycol) adversely affects the heat transferring properties of water. The increased viscosity slows flow rates through the coil. Anti-freeze concentrations above 30% require specialist pump equipment. They are not recommended.
Ethylene glycol solution (EGS) is the more efficient and the most widely-used of the two anti-freeze solutions.
Propylene glycol solution (PGS) is always used in the food industry because it is less toxic.
20 Gauge Steel Casing.
3 Row of High Grade Soft Smooth Copper.
1" Sweat Copper Headers.
12 Fins per Inch.
0.006" Corrugated Aluminum Fins.
Factory Tested
Hot Water Coil Warranty
10 years heat exchanger
Water is the most abundant medium for heating and cooling applications. Luckily there's a water coil from WSD for just about any hot or cold water application. We have over 30 years' experience in the design and manufacture of coils. There are few, if any, design and specification issues that we have not addressed before. When you specify a coil from WSD, you're sourcing it from the coil experts.