Vent Duct Heaters
As long time leaders in this field, we fabricate all essential components …right through to final assembly and testing. We make our own finned tubular elements, weld and fabricate the sheet metal frames, and manufacture the electronic controls.
MIL-SPEC Duct Heaters
Fully qualified per MIL-H-22594 and MIL-PRF- 22594 (all sizes), these heaters are made with Monel 400 finned tubular elements with hermetic terminal end seals and stainless steel frames, qualifying them for standard or nonmagnetic installations and making them impervious to salt water corrosion. They have been shock tested per MIL-S-901 and vibration tested per MIL-STD-167-1. Where required, they may be qualified for low magnetic permeability per MIL-I-17214. (See heater specification listings).
Marine Duct Heaters
Used on commercial and non-combat Naval vessels, these heaters are available with either side or bottom mounted terminal boxes housing control and safety components. They meet U.S. Coast Guard requirements per 46CFR111.87, are listed by UL per Standard 1996, File #E23192, and are ABS (American Bureau of Shipping) approved. Captive nuts may be furnished in factory-provided mounting holes to simplify installation. Built-in thermal cutouts, magnetic contactors, airflow switch, and control transformer are standard. Our wide range of optional controls includes pilot lights, SCR's, and electronic step controls.