Valad has manufactured Vent Duct Heaters for 25 years. Our specialty is marine and customized commercial applications. Valad uses the highest grade materials to assure our customers of the finest quality product. We carry a large inventory of Vent Duct Heaters in order to keep lead time to a minimum. Valad manufactures custom sizes to meet individual applications and our engineering staff will assist in your needs, regardless of quantity.

Vent Duct Heaters are manufactured per USCG, IEEE 45 Navy and UL guidelines. Valad’s Vent Duct Heaters are aboard the USS New Jersey and other naval vessels.

Valad has manufactured Vent Duct Heaters for 25 years. Our specialty is marine and customized commercial applications. Valad uses the highest grade materials to assure our customers of the finest quality product. We carry a large inventory of Vent Duct Heaters in order to keep lead time to a minimum. Valad manufactures custom sizes to meet individual applications and our engineering staff will assist in your needs, regardless of quantity.

Vent Duct Heaters are manufactured per USCG, IEEE 45 Navy and UL guidelines. Valad’s Vent Duct Heaters are aboard the USS New Jersey and other naval vessels.

Valad has manufactured Vent Duct Heaters for 25 years. Our specialty is marine and customized commercial applications. Valad uses the highest grade materials to assure our customers of the finest quality product. We carry a large inventory of Vent Duct Heaters in order to keep lead time to a minimum. Valad manufactures custom sizes to meet individual applications and our engineering staff will assist in your needs, regardless of quantity.

Vent Duct Heaters are manufactured per USCG, IEEE 45 Navy and UL guidelines. Valad’s Vent Duct Heaters are aboard the USS New Jersey and other naval vessels.

Unit is manufactured I/A/W USCG, IEEE45 and ETL-ANSI/UL 1996 approved.

Valad has manufactured Vent Duct Heaters for 25 years. Our specialty is marine and customized commercial applications. Valad uses the highest grade materials to assure our customers of the finest quality product. We carry a large inventory of Vent Duct Heaters in order to keep lead time to a minimum. Valad manufactures custom sizes to meet individual applications and our engineering staff will assist in your needs, regardless of quantity.

Vent Duct Heaters are manufactured per USCG, IEEE 45 Navy and UL guidelines. Valad’s Vent Duct Heaters are aboard the USS New Jersey and other naval vessels.

Units have been shock tested to MIL-S-901C and vibration tested to MIL-STD 167.

Sizing I/A/W MIL-H-22594A

All units are supplied with a manual hi-limit (capillary type) safety overload.

Units manufactured I/A/W USCG, Navy UL and IEEE 45 guidelines.

Please click on Request Information button for custom specification.

Units are manufactured I/A/W USCG, IEEE 45 Navy, and UL guidelines.

All contactors below are supplied in a NEMA 1 or NEMA 4 enclosure. Water proof enclosures are also available. Consult factory, if required.

All contactors are available with holding coils of 24, 120, 208, 240, 277, 380 and 440 volts.

Box Dimensions: 3.75H x 7.0L x 5.625W - 302/304 stainless steel.

These duct thermostats are used on rooftops with make-up heaters, duct heaters and air-venting systems of all types. They have SPDT snap-acting contact units and are unaffected by barometric pressure or cross temperatures. Flat flange mounting with a special coil element permits positioning the sensing bulb in the appropriate position in the air stream.

For control of residential, commercial or industrial heating or year round air conditioning, heat or cold anticipators are not required. Liquid charged temperature sensing elements, highly efficient diaphragms and leverage assures close control of temperature.

This control detects air flow on the absence of air flow in ducts, responding only to velocity of air movement. The one piece stainless steel paddle may be trimmed, if needed. The control is supplied with mounting plate gasket. Range adjusting screw permits field adjustment of flow rate setting.

The new style AFS-100 Sail Switch has a spring return arrangement that permits use of the switch in horizontal, up flow or down flow applications. The return spring may be readily disconnected for those applications requiring low velocity "on" operation. It is recommended in these cases that the sail switch be mounted with the sail hanging down into the air stream or in a horizontal position. Internal switch is UL and CSA approved for 5 Amp 125 VAC or 3 Amp 250 VAC.

Valad can supply four basic control panels:
(1) Remote Mechanical
(2) Integral Mechanical
(3) Remote Solid State
(4) Integral Solid State

Note: 100 kW heater requires 130 ampere load, will use 200 ampere disconnect.

On multi-stage control boxes, 3 or greater, a solid state staging controller should be used.

Control panel will have the following components:

1. Six staging contacts (primary)
2. Six staging contactors (secondary)
3. Control transformer 440/120
4. Transformer to be fused
5. Through cover disconnect
6. Terminal block for remote thermostats (six)
7. Terminal block for duct stat
8. Terminal block for sail switch
9. Terminal block for manual hi-limit thermostat/one per stage

Valad will assign a drawing number to each control box when order is placed. Prints of the control box and wiring diagram will be put on file and a copy sent to customer for future reference.

Customer to list all the components (See Example A).

Used in Valad's Integral or Remote Solid Staging Controller

Note: Total number of Heat and Cool steps can not exceed 10.

Valad SCR controls are of the zero voltage fired type (eliminate radio noise).

Vibration tested I/A/W MIL-STD-167-1.