Advantages of Open Coil Heating Elements :

In case you’re looking for a product that suits your simple space heating application, you’d better consider an open coil duct heater, since it provides lower kW output.
available in small size compared to a finned tubular heating element
Releases heat directly into the air stream, which makes it run cooler that the finned tubular element
Has a lower drop in pressure
Provides a large electrical clearance
Using correct heating elements on heating applications can help minimize your manufacturing costs. If you need a reliable partner for your industrial application needs, contact us today. One of our customer support specialists will be waiting to assist you.

The selection of the correct wire gauge, wire type and coil diameter requires quite some experience. There are standard elements available on the market, but quit often they need to be custom built. Open coil air heaters work best below air velocities of 80 FPM. Higher air velocities could cause the coils to touch each other and short out. For higher velocities, select a tubular air heater or strip heater.

The big advantage of open coil heating elements is the very quick response time.

National heaters open coil electric duct heaters are available in any size from 6” x 6” up to 144” x 96” and up to 1000 KW in one section. Single heater units are rated to produce up to 22.5 KW per square foot of duct area. Multiple heaters can be made and field installed together to accommodate large duct sizes or KW’s. All voltages to 600-volt single and three phase are available.

Applications :

Air Duct heating
Furnace heating
Tank heating
Pipe heating
Metal tubing
Ovens