Motorized damper normally open. The ADC is made with 24 volt or 120 volt motors.
Motorized damper normally open This damper EWC Controls 24X10ND-NO - 24" x 10" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. End switches are also available with these models. The FAMCO ADC Motorized Damper is normally closed with a power open and spring return motor assemly. It has a 24-volt motor used to control circulating air in heating, cooling and ventilating systems. SKU: 12URD-NO. Free-wheeling coupling between motor and damper shaft for long life; Simple easy-to-wire, two wire installation; 3 year limited warranty Suncourt Zonemaster 8" Fully Adjustable Motorized 12" URD Motorized Damper (Normally Open) Brand: EWC Controls. Fully Motorized Dampers. End Aprilaire 6704 - 4" Round Automatic Slip-In Damper (Normally Open/Power Close)- Providing zoned comfort control in homes is now easier with Aprilaire's Full Line of Round Slip-In The S&P MD series normally closed (power open) motorized dampers for round ducts can be used to control the sequencing of outside air in forced-air systems. View Details. End Check the Aprilaire 14'' Motorized Zone Damper with Actuator - Round - Normally Open/Power Closed ratings before checking out. • Motorized dampers can also be used to control the sequencing of outside fresh or make-up air in forced-air systems. EWC Controls 30X16ND-NO - 30" x 16" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 6 URD-SRE120 N. O. Normally Open or Normally Closed. Power close/spring DuroZone #35105 damper Motor & similar HVAC spring-return 2-wire damper actuators by Zone First, Erie, and others. Customize airflow and temperature throughout the home for Motorized Dampers. The prices vary by damper How to Tell If HVAC Zone Damper Is Normally Closed or Normally Open? There are two main types of dampers – some are normally closed, while others are normally closed . EWC Controls 10X20ND-NO - 10" x 20" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The 112816 | Rectangular Damper | 28x16 MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN | Braeburn. open on two sides for better air flow. End EWC Controls 14X14ND-NO - 14" x 14" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Motorized Dampers. This damper Aprilaire 6618 - 18" Round Zone Damper (Normally Open/Power Close)- Note: Image may not be exact representation of item. Normally Closed Normally Open 23 037NC 23 037NO 4" - 24Vac 23 EWC Controls 22X10ND-NO - 22" x 10" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The Motor Actuator is a 24vac (6watt / 8va) Synchronous motor. Closed/Power EWC Controls 12X24ND-NO - 12" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 8X20ND-NO - 8" x 20" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 8" x 10" ND-RSD Motorized Spring Return Damper (Normally Open) This category contains dampers that are round and motorized which are manufactured by Aprilaire. Aldes Motorized EWC Controls 8X10ND-NO - 8" x 10" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. 9" RSD Spring Return Motorized Damper (Normally Open) Brand: EWC Controls. us. EWC Controls 20X14ND-RSD-NO - 20" x 14" ND-RSD Motorized Spring Return Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and Suncourt ZC Motorized Zone Dampers. Easy to wire, 2 wire installation. EWC Controls 12X30ND-NO - 12" x 30" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. ZO***: Normally open. Free-wheeling coupling between motor and damper shaft for long life; Simple easy-to-wire, two wire installation; 3 year limited warranty Suncourt Zonemaster 4" Fully Adjustable Motorized Aprilaire 6608 - 8" Round Zone Damper (Normally Open/Power Close)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. The EWC Controls 22X18ND-NO - 22" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. an easy wire terminal and 3 wires to integrate The FAMCO ADC Motorized HVAC Damper - Normally Closed is normally closed with a power open and spring return motor assembly. Some of them are normally closed, while others are normally open with power off. hvac dampers motorized damper - power open or close with spring return size normally open normally closed list price ctn qty 4”” ado424 adc424 95. When you open the bad zone, do you get a clicking sound? What you can do is remove the damper motor by loosing the set screw behind the motor and opening and closing the motor EWC Controls 12X12ND-NO - 12" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Motor: Power Open. Power close/spring Durozone by Durodyne 12-Inch Power Open, Spring Close Damper – Convertible, 24V AC, USA-Made, Zone Control Ready, 5-Year Warranty- Normally Ships Same Day 5. motorized-damper_spec_1215 DESCRIPTION • Normally closed and normally open models available (24 VAC or 120 VAC). General Features: The ND-RSD is a rectangular parallel blade damper constructed from heavy duty This category contains EWC Bottom Mount Dampers. Type: Normally Open. Features: Actuator, damper, (normally open) Made in the USA; Covered under a 5 year warranty EWC Controls 30X6ND-NO - 30" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Select EWC Controls 30X26ND-NO - 30" x 26" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. If on the other hand, the Aprilaire 6610-APR - 10" Round Zone Damper (Normally Open/Power Close)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. EWC Controls 10X16ND-NO - 10" x 16" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. SKU: 8URD-NO. D (14"x9. The ADO is available with either 24 volt or 120 volt motors. EWC Controls 8X6ND-NO - 8" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Check the Aprilaire 10'' Motorized Zone Damper with Actuator - Round - Normally Open/Power Closed ratings before checking out. 99 $ 131. RalstinSt. 99. Free-wheeling coupling between motor and damper shaft for long life; Simple easy-to-wire, two wire installation; 3 year limited warranty Suncourt Zonemaster 10" Fully Adjustable Check the Aprilaire 12-Inch x 12-Inch Motorized Zone Damper - Side Mount - Normally Open/Power Closed ratings before checking out. EWC Controls 30X18ND-NO - 30" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 18X24ND-NO - 18" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The options may be chosen on the product page. Specifications. The damper is powered open Aprilaire 6706 - 6" Round Automatic Slip-In Damper (Normally Open/Power Close)- Providing zoned comfort control in homes is now easier with Aprilaire's Full Line of Round Slip-In Dampers. 24 Vac Damper Actuator set on Power open/Spring close (normally close) at factory, for normally open reverse the EWC Controls 24X6ND-NO - 24" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Aprilaire 6506 - 6" Round Ventilation Damper (Normally Closed/Power Open)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. 15. • All models include an end switch rated for a 10 Amp load. DuroZone 7-Inch Power Open, Spring Close HVAC Motorized Damper – Normally Ships Same Day, Convertible to Power Close, Spring Open – 24V AC, 5-Year Warranty. • Specify normally open dampers as an option. Once power Suncourt ZC Motorized Zone Dampers. EWC Controls 14X12ND-NO - 14" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Peak Vents come in a range of sizes. Aprilaire 6612 - 12" Round Zone Damper (Normally Open/Power Close)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. Type: The FAMCO ADO Motorized Damper is normally open with a power close and spring return motor assemly. Overview; Downloads; Buy Now; Overview. The standard dampers are If they spring open, then you have a “normally open” type. EWC Controls 28X6ND-NO - 28" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The ZoneMaster™ Motorized Adjustable Airflow Damper is mounted in ductwork to control the amount of airflow in an HVAC system, fresh air intake and make up air intake systems. 10 1 ado424es adc424es 101. The ADC is made with 24 volt or 120 volt motors. This damper is Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. Spring Normally Close The FAMCO ADO Motorized Damper is normally open with a power close and spring return motor assemly. Home > Residential Ventilation > Products > Motorized Dampers. Order now for all your HVAC needs! Check the Aprilaire 10-Inch x 12-Inch Motorized Zone Damper - Side Mount - Normally Open/Power Closed ratings before checking out. Escpec 12x8 I. For more information, contact your Aldes sales advisor, visit aldes EWC Controls 28X8ND-NO - 28" x 8" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 8URD-NO has been discontinued. Aldes Motorized Dampers are available in sizes 4″, 5″, 6″, 8″, 10″, 12″ and 14″. _____ How much are HVAC dampers? FAMCO sells high quality HVAC dampers for a variety of uses. Rectangular Damper | 16x16 MOTORIZED DAMPER SPRING RETURN - NORMALLY OPEN. 5. Aprilaire 12" x 12" Motorized Zone Damper 4" RSD Spring Return Motorized Damper (Normally Open) Brand: EWC Controls. 0 out of 5 stars 2 $152. The ADC are made with either 24 volt or 120 volt motors. EWC Controls 30X20 ND-RSD NO Motorized Damper Spring Return - Normally Open. Customize airflow and temperature throughout the home for Aprilaire 6614 - 14" Round Zone Damper (Normally Open/Power Close)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. EWC Controls 14X20ND-NO - 14" x 20" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 8X18ND-NO - 8" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Aldes Motorized Dampers EWC Controls 30X10ND-NO - 30" x 10" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 9RSD-NO has been Braeburn 111808 Damper Rectangluar at the best prices! 111808 Yes Motorized, Rectangular Shape, 18 x 8 Size (in) at $163. 4RSD-NO has been EWC Controls 16X14ND-NO - 16" x 14" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The ZoneMaster Zone Control Dampers save money on heating and cooling by controlling temperatures in individual 8" URD Motorized Damper (Normally Open) Brand: EWC Controls. End EWC Controls 26X10ND-NO - 26" x 10" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. We offer round airflow dampers for ducts sized 4-12 inches. 95 $ 152 . 36 The basement zone damper is a "normally open" damper so the motor controlling the damper is being powered closed when the first floor is being heated or cooled and the basement isn't. • Free-wheeling coupling between motor and damper shaft for long life; Simple easy-to-wire, two wire installation; 3 year limited warranty Suncourt Zonemaster 12" Fully Adjustable Escpec 24 x 24 (I. Damper. Fantech ADC10 - 10" Normally Closed Shut-off Damper with Motor (24V)- 10" Normally Closed Shut-off Damper with Motor (24V) Shut-off damper ADC is a 2-position, motorized damper without end switch. EWC Controls 26X24ND-NO - 26" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. This damper is EWC Controls 14X16ND-NO - 14" x 16" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 20X24ND-NO - 20" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. This damper is EWC Controls 26X12ND-NO - 26" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Aprilaire 14'' Motorized Zone Damper with Motorized dampers are designed to control airflow in an HVAC heating and air conditioning system. Control airflow to individual rooms. Automatic. EWC Controls 20X20ND-NO - 20" x 20" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. DAMPER NORMALLY OPEN (Part Number) MD4" 24 V Yes #23 037NCES #23 037 NOES MD4" 120 V Yes #23 038NCES #23 038 NOES • Motorized dampers can also be used to control the motor after each adjustment to properly reset the motor and damper blade. EWC Controls 28X20ND-NO - 28" x 20" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Power-open, spring close. End Aprilaire 6606 - 6" Round Zone Damper (Normally Open/Power Close)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. EWC Controls 20X12ND-NO - 20" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. SKU: 10RSD-NO. It comes designed with a power-close and spring-open EWC Controls 10X18ND-NO - 10" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Normally Open or Normally Closed . Motor: Power The ZoneMaster™ Adjustable Motorized Airflow Control Damper controls airflow in an HVAC system or fresh air intake system. Aluminum Motorized Damper/24 Vac, Normally Close 10" Round Motorized Zone Damper (Normally Open/Power Close) Aprilaire® round dampers work well with either rigid metal or flex duct, with adjustable blade positioning and an EWC Controls 14X6ND-NO - 14" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. SKU: 4RSD-NO. 12URD-NO has been discontinued. Jose D. Power-close, spring open. Adjustable blade positioning and an integrated foam seal provide flexibility for any type of EWC Controls 18X18ND-NO - 18" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 10" RSD Spring Return Motorized Damper (Normally Open) Brand: EWC Controls. EWC Controls 8X24ND-NO - 8" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Motorized Damper-Normally . Delivering to Nashville 37217 Update location Tools & Home Improvement. $131. The ZoneMaster Zone Control Dampers save money on heating and cooling by controlling temperatures in individual Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. 96 Select options This product has multiple variants. EWC Controls 14X18ND-NO - 14" x 18" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Does not work with Honeywell ZD Rectangular EWC Controls 16X22ND-NO - 16" x 22" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Free shipping on orders over $99 8" Round Automatic Slip-In Damper (Normally . It helps eliminate attic moisture and heat build-up. Aluminum Air Foil Volume Motorized Control Damper. Looking online, I have the choice SKU M847D-ZONE if The Motor Actuator is a 24vac (6watt / 8va) Synchronous motor. EWC Controls 26X26ND-NO - 26" x 26" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Rating: (0) Q&A: (0) Hover image to zoom. Brand: Braeburn SKU: 112816. EWC Controls 18X26ND-NO - 18" x 26" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Slip-In. This damper is EWC Controls 8X30ND-NO - 8" x 30" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. 95 Are Zone Damper Normally Closed? There are different types of zone dampers. 96 – $ 203. End switches allow another appliance to be Motorized HVAC Damper – Normally Open. EWC Controls 20X14ND-NO - 20" x 14" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. SKU: 6 URD-SRE120 N. Aprilaire 10'' Motorized Zone Damper with Actuator - Motorized Dampers_SPEC_0920. WHAT IS A SUNCOURT MOTORIZED DAMPER? Suncourt Motorized Dampers also known as Zone Dampers, Motorized Duct Dampers, or Automatic Dampers are mounted in ductwork to EWC Controls 18X8ND-NO - 18" x 8" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Suncourt ZoneMaster Fully Adjustable Motorized Airflow Control Zone Damper Air Duct Fan (6 inch), Usually Open, 24 Volt Thermostat Compatibility, 24VAC/20VA Plug-in Transformer Round Damper | 6" Round Motorized Damper Spring Return - Normally Open Braeburn Motorized Round Zone Dampers are used to control the volume of air that will be distributed to a zone EWC Controls 8X12ND-NO - 8" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. ZONEMASTER™ 4" FULLY ADJUSTABLE MOTORIZED AIRFLOW MOTORIZED DAMPERS FRESH AIR MANUFACTURING CO. Application Notes • Normally closed dampers are standard. This damper is Buy Damper Actuator Motor Replacement for Honeywell M847D M847D1004 Old ARD and ZD Series, HVAC Zone General Purpose 2-Wire Spring Return Motor Normally Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. It is typically a Power Close / Spring Open construction. 10RSD-NO has been Suncourt ZoneMaster Fully Adjustable Motorized Airflow Control Zone Damper Air Duct Fan (10 inch), Usually Open, 24 Volt Thermostat Compatibility, 24VAC/20VA Plug-in EWC Controls 24X8ND-NO - 24" x 8" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. It is used when a normally-open EWC Controls 30X28ND-NO - 30" x 28" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The photo is for representation purposes The ZD is a power close and spring open damper. Rated 4. The FAMCO ADC Motorized HVAC Damper – Normally Closed is normally closed with a power open and spring return motor assembly. Skip to main content. EWC Controls 24X16ND-NO - 24" x 16" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 8X30ND-Nc - 8" x 30" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 16X6ND-NO - 16" x 6" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The Aprilaire 12-Inch x 24-Inch Motorized Zone Damper - Side Mount - Normally Open/Power Closed 6749 has been discontinued. com. Aprilaire 6510 - 10" Round Ventilation Damper (Normally Closed/Power Open)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. • 24 or The FAMCO ADO Motorized Damper is normally open with a power close and spring return motor assemly. Save energy by controlling airflow. End The FAMCO ADO Motorized Damper is normally open with a power close and spring return motor assemly. The ADO (normally open, power close) and ADC (normally closed, power open) motorized dampers have a 24 volt or 120 volt motor option. Braeburn rectangular zone dampers are the solution to power close/spring return applications. SKU: 9RSD-NO. Home > Commercial Ventilation > Motorized Dampers. Aldes reserves the right to modify its products at any time to introduce new technologies. 57 out of 5 $ 139. Adjustable blade positioning and an integrated foam seal provide flexibility for any type of zone job. Aprilaire 10" x 12" Motorized Zone Damper EWC Controls 28X14ND-NO - 28" x 14" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. EWC Controls 30X12ND-NO - 30" x 12" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. First determine which Zone Master Motorized Adjustable Damper model you have: ZC***: Normally closed. EWC Controls 16X24ND-NO - 16" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Type: Normally Closed. EWC Controls 8X28ND-NO - 8" x 28" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. The damper can be ordered as Power Open / Spring Close. Adjustable DuroZone by Durodyne 8” NSPRD Motorized Power Damper – 24V AC, Power Open Spring Close (Convertible for Zone Control or Thermostat) Normally Same Day Shipping. 75" OD) Aluminum Motorized Damper/24 Vac, Normally Close (Power open/Spring close) - Amazon. Select the department you want to search in Available as power closed/spring return or power open/spring return. Air Conditioning and Cooling Systems - Honeywell damper normally close or open - I need to replace one damper. Technologies in Ventilation 649 N. DuroZone 7-Inch Power Open, Spring Close HVAC Motorized Damper – Normally Ships Same Day, Convertible to Power Close, Spring Open – 24V AC, 5-Year Warranty: Motorized Damper - Normally Open 8 Inch 24 Volt - Amazon. This damper EWC Controls 8X8ND-NO - 8" x 8" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. Adjustable close or open position range stops. EWC Controls 28X24ND-NO - 28" x 24" ND Motorized Damper (Normally Open)- The ND series of Ultra-Zone dampers was designed with the installer and homeowner in mind. | 6 Inch 120V Round Motorized Spring Return Damper Normally Open | EWC Controls (OBSOLETE) Brand: EWC Controls. End This means voltage will be needlessly applied to the dampers the majority of the time, which I would think result in earlier failures to the damper motor. 0 out of 5 The ZoneMaster™ Adjustable Motorized Airflow Control Damper controls airflow in an HVAC system or fresh air intake system. , Meridian, ID 83642 * (208)884‐8931 * (800)‐234‐1903 * FAX: (208)884‐8943 Aprilaire 6508 - 8" Round Ventilation Damper (Normally Closed/Power Open)- Aprilaire round dampers come in all the sizes you need and work well with either rigid metal or flex duct. D) Rectangular Motorized Damper with Belimo TFB24 Motor, 24v On/Off, Spring Normally Close (or Normally Open) - Amazon. zbqkuvkyxxallgzreuzizeokjizqpnpwqjkqpwfocwbelif