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Posiciones de función del interruptor:

OFF: para desactivar el dispositivo.

ON: para activar el dispostivo.

HEAT: para activar automática con elevación de la temperature.

COOL: para activar automática con desciende de la temperature.

El perilla rotatorio controla la automática encendido y apagado para 

enfriamiento y calefacción.

El “DIFFERENTIAL” controla la frecuencia del dispositivo de encendido 

y apagado.

Commutateur de function positionne:

OFF: Arret du dispositive.

ON: Fonctionnement continu du dispositive.

HEAT: Pour le démarrage automatique lorsque la température s'élève

COOL: Pour le démarrage automatique lorsque la temperature descend. 

Le bouton rotatif fixe la marche / arrêt automatique pour chauffage ou 

refroidissement.

Le “Differential” permet un contrôle pour marche / arrêt  le cyclisme.

Function switch selections:

OFF: to stop operation of the device.

ON: for continuous running of device.

HEAT: for automatic on with temperature rise.

COOL: for automatic on with temperature drop.

The rotary knob selects the automatic on/off 

temperature setting for heating or cooling.

The Differential switch provides control over on/off 

cycling.

GARANTIE LIMITÉE D’UN AN

 Sous réserve des limites suivantes, Suncourt Inc. (fabricant) garantit que le thermostat enfichable 

DuctStat® (Temperature Sensitive Switchtm) sera, pendant 1 (un) an à compter de la date d’achat 

d’origine, exempt de vice de matériau ou de main-d’œuvre. Cette garantie est assujettie aux limites 

suivantes :

(this is a numbered list)

1. La responsabilité du fabricant se limite au remplacement ou à la réparation du DuctStat®, à sa 

convenance.

2. Un DuctStat® défaillant doit être retourné, accompagné de la preuve d’achat et bien emballé 

pour éviter des dommages durant le transport.

3. Cette garantie ne s’applique pas aux défauts résultant de l’altération, d’un abus, d’un dommage 

accidentel, d’une réparation non autorisée ou d’une mauvaise utilisation du DuctStat®. Cette 

garantie remplace toute autre garantie et conditions de la part du fabricant, et le fabricant ne pourra 

avoir d’autres responsabilités, de nature délictuelle ou autre, à l’égard du thermostat enfichable 

DuctStat® (Temperature Sensitive Switchtm).

REMARQUE : Le produit réel peut différer de celui présenté dans les illustrations.

Suncourt se réserve le droit de modifier un ou plusieurs des caractéristiques, des styles, des 

SUNCOURT INC.

P.O. Box 40

Durant, IA 52747-0040

1.800.999.FANS (3267)

www.suncourt.com

WNT860-0711-C01

IMPRIMÉ EN CHINE

TEMPERA

TURE SENSITIVE SWITCH

Install screws here for round ducts.

Instalar tornillos a aquí para conductos redondos.

Installez les vis ici pour les conduits ronds.

Air Intake Hole

Install screws here for square or rectangular ducts.

Instalar tornillos a aquí para conductos cuadrados ó rectangulares.

Installez les vis ici pour les conduits carrés ou rectangulaires.

PLANTILLA

TEMPLA

TE

GABARIT

Orificio de Acceso de Aire

Trou D'arrivée D'air

If you want the DuctStat® to turn a device on when the temperature rises above your set point you 

put it on HEAT. If you want the DuctStat® to turn a device on when the temperature drops below 

your set point you put it on COOL. The DuctStat® will deactivate when the temperature returns to 

your set point.

If you have questions or comments, please call us at 1-800-999-3267 or send an email to 

info@suncourt.com. 

 

HEAT-COOL SETTING LOGIC

In order to prevent excessive stress on the mounting screws, support the DuctStat® when 

unplugging connected devices. 

Do NOT use the DuctStat® outdoors or in damp locations. The DuctStat® must remain 

accessible.

The DuctStat® is intended to control the automatic On/Off operation of In-Line Duct Fans™ 

installed in the ductwork of forced air distribution systems.

The DuctStat® can also control the line voltage to any electrical device with a maximum current 

draw of 5 Amperes.

The DuctStat® is equipped with an external, replaceable 5 AMP fuse to protect the electronic 

circuitry from overload or short circuits.

This device is designed to turn on and off from temperature rise and fall. The DuctStat® 

will turn on in HEAT mode when it senses temperature rise. The DuctStat® will turn on in 

COOL mode when it senses temperature fall.

 

INSTALLATION NOTES

INSTALLATION INSTRUCTIONS

OPERATION SETTINGS

FOR HEATING

STEP 8

Turn counterclockwise

until the device turns on.

Turn clockwise until the

device turns off.

STEP 9

Position the Function switch

to HEAT.

(Turns "ON" on temperature rise)

STEP 8

Turn clockwise until

the device turns on.

Turn counterclockwise until

the device turns off.

STEP 9

Position the Function switch

to COOL.

(Turns "ON" on temperature drop)

FOR COOLING

IMPORTANT NOTE

OPERATION INSTRUCTIONS FOR THE 

DUCTSTAT

®

 TEMPERATURE SENSITIVE SWITCH

MODEL: DS100

READ AND SAVE THESE INSTRUCTIONS 

IMPORTANT NOTICE

With the use of any electrical appliance, it is important to observe all basic precautions to 

minimize the risk associated with use, such as electrical shock, fire, or injury to persons.

Read these instructions before using your DuctStat® Temperature Sensitive Switch™.

If you have doubts or are unfamiliar with this type of installation work, seek the services of 

a qualified electrician.

Suncourt Inc. assumes no responsibility for installation of the DuctStat®.

For your safety and protection, follow all instructions and adhere to applicable building 

and/or electrical codes.

This unit is equipped with a three prong grounded plug. Do NOT attempt to defeat this 

feature of this plug. Defeating this will void the warranty.

Do not use in an attic or crawlspace.

4. Drill holes in the air duct to line up with the appropriate holes located on the template. On 

round ducts, two screws placed through the slots in the DuctStat®’s base will be adequate 

(placement shown on template). On square or rectangular ducts use four screws, one at each 

corner of the DuctStat® (placement shown on template).

5. Tighten the supplied screws snugly in the appropriate placement for your ductwork. DO 

NOT OVER TIGHTEN

6. Plug the device into the outlet on the face of the DuctStat®.

7. Plug the DuctStat® power cord into a 120 VAC grounded household outlet.

8. Follow Operation Settings to adjust the DuctStat®.

When switch is on “HEAT” the DuctStat® will turn ON as the temperature rises.

1. Perform Operation Settings in the environment in which the DuctStat® is being used. For 

use with forced air systems, make sure the blower is not running. 

2. Plug in the DuctStat® and set the switch to OFF.

3. Set the Differential to 3°.

4. Plug the device you want to control into the DuctStat®.

5. Turn the knob clockwise until it stops. DO NOT FORCE.

6. Move the switch to ON. You should see/hear the device that is plugged into the DuctStat® 

turn on.

7. Turn the switch to HEAT. At this point the device plugged into the DuctStat® will turn off. 

8. Slowly turn the knob counterclockwise, just until the device plugged into the DuctStat® turns 

ON.

9. Slowly turn the knob clockwise, just until the device plugged into the DuctStat® turns OFF.

10. The DuctStat® is now set to turn on when the temperature rises. If you would like the 

DuctStat® to have a wider range, simply switch the Differential to 7°. This will turn the device 

on and off with a larger on/off differential.

When the switch is on “COOL” the DuctStat® will turn ON as it senses cooler air 

(temperature drop).

1. Perform Operation Settings in the environment in which the DuctStat® is being used. For use 

with forced air systems, make sure the blower is not running. 

2. Plug in the DuctStat® and set the switch to OFF.

3. Set the Differential to 3°.

4. Plug the device you want to control into the DuctStat®.

5. Turn the knob counterclockwise until it stops. DO NOT FORCE.

6. Move the switch to ON. You should see/hear the device that is plugged into the DuctStat® turn 

on.

7. Turn the switch to COOL. At this point the device plugged into the DuctStat® will turn off. 

8. Slowly turn the knob clockwise, until the device plugged into the DuctStat® turns ON.

9. Slowly turn the knob counterclockwise, until the device plugged into the DuctStat® turns OFF.

10. The DuctStat® is now set to turn on when the temperature drops. If you would like the 

DuctStat® to have a wider range, simply switch the Differential to 7°. This will turn the device on 

and off with a larger on/off differential. 

To shorten the length of time that your device continues to run after the warming or cooling air has 

shut off, rotate the knob control slightly further, as in Step 9.

Should you experience frequent On/Off cycling, move the Differential switch to the 7° position.

1. Locate the position between the In-Line Duct Fan™ and the register where you wish to 

mount the DuctStat®. Mount between 1 and 10 feet downstream from the In-Line Duct Fan™.

2. Tape the template supplied with the DuctStat® to the air duct to mark the mounting holes to 

be drilled.

3. Drill a hole in the air duct for the Air Intake Hole shown on the template. This hole should 

be 1/2" in diameter.

Posiciones de función del interruptor:

OFF: para desactivar el dispositivo.

ON: para activar el dispostivo.

HEAT: para activar automática con elevación de la temperature.

COOL: para activar automática con desciende de la temperature.

El perilla rotatorio controla la automática encendido y apagado para 

enfriamiento y calefacción.

El “DIFFERENTIAL” controla la frecuencia del dispositivo de encendido 

y apagado.

Commutateur de function positionne:

OFF: Arret du dispositive.

ON: Fonctionnement continu du dispositive.

HEAT: Pour le démarrage automatique lorsque la température s'élève

COOL: Pour le démarrage automatique lorsque la temperature descend. 

Le bouton rotatif fixe la marche / arrêt automatique pour chauffage ou 

refroidissement.

Le “Differential” permet un contrôle pour marche / arrêt  le cyclisme.

NEVER EXPOSE YOUR DUCTSTAT TO TEMPERATURES OVER 140°F (60°C)

Function switch selections:

OFF to stop operation of the device.

ON for continuous running of device.

HEAT for automatic on with temperature rise.

COOL for automatic on with temperature drop.

The rotary knob selects the automatic on/off temperature setting 

for heating or cooling.

The Differential switch provides control over on/off cycling.

Function switch selections:

OFF: to stop operation of the device.

ON: for continuous running of device.

HEAT: for automatic on with temperature rise.

COOL: for automatic on with temperature drop.

The rotary knob selects the automatic on/off 

temperature setting for heating or cooling.

The Differential switch provides control over on/off 

cycling.

ONE YEAR LIMITED WARRANTY

Subject to the following limitations, Suncourt Inc. (manufacturer) warrants that the DuctStat

®

 

Temperature Sensitive Switch™ will, for 1 (one) year from date of original retail purchase, but not 

exceeding 2 (two) years from date of manufacture, remain free from appearance of defects in 

workmanship or materials. This warranty is subject to the following limitations: (a) manufacturer’s 

liability is limited to the replacement or repair of the DuctStat®, as decided by the manufacturer; (b) 

a defective DuctStat® must be returned, prepaid, with proof of purchase, well packaged to avoid 

damage in transit; and (c) this warranty does not apply to defects resulting from the alteration, 

abuse, accidental damage, unauthorized repair, or misuse of the DuctStat®. This warranty is given 

in lieu of all other warranties, guarantees, and conditions on manufacturer’s part, and the manufac-

turer shall have no tortious or other liability in respect to this DuctStat

®

 Temperature Sensitive 

Switch™. Ship unit to Suncourt Inc. only after obtaining a Return Goods Authorization (RGA) 

number. Returns without this RGA number will not be accepted.

Actual product appearance may differ from illustrations.

Suncourt reserves the right to modify any or all of its products' features, designs, components and 

specifications without notice.

SUNCOURT INC.

P.O. Box 40

Durant, IA 52747-0040

1.800.999.FANS (3267)

www.suncourt.com

WNT860-0711-C01

PRINTED IN CHINA

TEMPERA

TURE SENSITIVE SWITCH

Install screws here for round ducts.

Instalar tornillos a aquí para conductos redondos.

Installez les vis ici pour les conduits ronds.

Air Intake Hole

Install screws here for square or rectangular ducts.

Instalar tornillos a aquí para conductos cuadrados ó rectangulares.

Installez les vis ici pour les conduits carrés ou rectangulaires.

PLANTILLA

TEMPLA

TE

GABARIT

Orificio de Acceso de Aire

Trou D'arrivée D'air

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