Suncourt Duct Booster Fans & DS100 Thermostat

DB fans: These fans install into home or office ductwork for out-of-view, year-round comfort. Operate by wiring directly to the main blower of your heating/cooling system, an on/off switch, VS200 speed controller, or Suncourt's DuctStat® Plug-In Thermostat™. With balanced Valox, aluminum or polycarbonate (Lexan) blades they are ideal for boosting supply air, return air, or venting. DS100 or other controls not included.

DS100: A solid-state, user-adjustable thermostat for general use with Suncourt, or other products to turn loads up to 5 Amp On/Off automatically at a selected temperature. Control both temperature rise (heat) and temperature drop (cool). Installs on the outside of the duct downstream of the duct booster. Temperature adjustable between approximately 40°F and 110°F. Must be manually switched between heat/cool modes in the winter and in the summer. 120 VAC.

VS200: Variable speed controller compatible with Suncourt duct booster fans. 120 VAC, 2.5 Amp max.  Plugs into outlet.

model description usually ships price QTY
DB204C Suncourt in-line duct booster fan. 4 inch round ducts. Balanced Polycarbonate fan blades. 65 CFM free air. 0.30 Amps. With power cord. 1 Day. In-stock $33.99
DB205C Suncourt in-line duct booster fan. 5 inch round ducts. Balanced Polycarbonate fan blades. 140 CFM free air. 0.35 Amps. With power cord. 1 Day. In-stock $34.99
DB206C Suncourt in-line duct booster fan. 6 inch round ducts. Balanced Polycarbonate fan blades. 160 CFM free air. 0.35 Amps. Six inch long housing. With power cord. 1 Day. In-stock $37.99
DB208C Suncourt in-line duct booster fan. 8 inch round ducts. Balanced Polycarbonate fan blades. 210 CFM free air. 0.75 Amps. With power cord. 1 Day. In-stock $46.99
DB210C Suncourt in-line duct booster fan. 10 inch round ducts. Balanced Aluminum fan blades. 300 CFM free air. 1.5 Amps. With power cord. 1 Day. In-stock $59.99
DB212C Suncourt in-line duct booster fan. 12 inch round ducts. Balanced polycarbonate fan blades. 650 CFM free air. With power cord. 1 Day. In-stock $69.99
DS100 Suncourt DuctStat plug-in thermostat. Works with any 110-120 VAC product up to 5 Amps. 1 Day. In-stock $29.99
VS200 Suncourt variable speed fan controller. Plug-in receptacle for easy installation. 120 VAC. 2.5 Amp max load. 1 Day. In-stock $30.99
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suncourt db200 fan

suncourt db booster fans



suncourt ds100 controller


suncourt vs200 speed controller

Do you have questions about the products on this page?

Click on the ? image on the left or this link to ask us your questions!
#1 Q:   With the DB206C and DS100 installed into a 6 inch duct, can you recommend a powered damper that could open and close automatically? Open only when the blower is on? I have a garage that is not always heated or cooled. Thanks.
A:   You can use the Suncourt ZC206 normally closed 6 inch damper. Power applied to open the damper, spring close when power off:

       Asked on 2024-01-22 by Mike
#2 Q:   Can you use the DS100 with the VS200? Or do you just need one or the other?
A:   Yes you can. The DS100 would switch the fan on/off and the VS200 would control the speed of the fan once switched on. We normally see the fans used with just the DS100 in duct boosting applications.

       Asked on 2023-12-05 by C H
#3 Q:   Do the fans come with the DS100, or are they to be purchased separately.
A:   The DS100 is purchased separately.

       Asked on 2022-10-10 by Bill
#4 Q:   Can these be used to vent my dryer exhaust ? I will be stacking my dryer, is their a specified Distance the motor should be from the dryer. Where motor will mount its about 20 to outside.
A:   No. These are not rated for dryer exhaust. Take a look at our dryer boosters category. You will typically need a lint trap if the fan is closer than 15 feet from the dryer:

       Asked on 2021-10-11 by Rick
#5 Q:   what is the decibals of the 5 DB fan? Thank you
A:   51 dBA. More info on the Specs tab.

       Asked on 2021-01-06 by Shivani
#6 Q:   What is the warranty on the booster fans?
A:   1 year manufacturers warranty.

       Asked on 2020-10-11 by DANNY
#7 Q:   Can these booster fans be installed on a flexible duct? Is it better to install closer to the AC unit, the room or in the middle?
A:   Yes, you can install them on flex duct. Install them closer to the AC unit to keep any fan noise away from the rooms.

       Asked on 2020-05-19 by Ken
#8 Q:   how Loud is the 12fan
A:   The 12 inch fan is listed at 55 decibels.

       Asked on 2020-01-16 by Verne
#9 Q:   Does the DS 100 plug in to a wall outlet and the booster fan plug in to the DS 100?
A:   Yes, that is correct.

       Asked on 2019-12-07 by Tom
#10 Q:   Where do I find the wiring diagram for a DB204
A:   The DB series fans now come complete with power cords so you can plug the fan in. No wiring required.

       Asked on 2018-11-09 by BOB
#11 Q:   Can the DS100 be installed on flex duct?
A:   No, you would not have any support for the stat. It needs to be screwed to a rigid structure and a hole made for air sensing.

       Asked on 2016-07-15 by Jerry
#12 Q:   When these are off do they substantially block the regular blowers airflow?
A:   Not substantially, but they are an impediment.

       Asked on 2014-07-02 by Chuck
#13 Q:   What is the Max operating temp?
A:   As with the fans they are coupled with, the max temp it can be exposed to is 140 degrees.

       Asked on 2013-10-25 by rgk
#14 Q:   Does the fan have a plug in or does it need to be wired to furnace blower switch?
A:   There is a pigtail to wire to, some folks wire to the blower if near enough, others will use the DS100 or a localized pressure switch if the fan is far from the air handler.

       Asked on 2013-10-16 by Kevin B
#15 Q:   What is the voltage for the 10 inch Suncourt Duct Booster Fan
A:   It takes 110v and 1.5 amps.

       Asked on 2013-07-01 by Hal
#16 Q:   how does duct booster fan work with the blower when the blower shuts off ?
A:   It will also turn off if hooked up to the DS100 or wired to the air handler. Otherwise so long as there is power it will run.

       Asked on 2013-06-21 by Terry

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